ku_1986
=======

J\. K\. Ku and D\. W\. Setser, "Collisional deactivation of Xe\(5p56p\) states in Xe and Ar", J\. Chem\. Phys\. 84, 4304\-4316 \(1986\)

`Source record <https://github.com/LupoLab/optmat/blob/main/src/optmat/data/sources/ku_1986.toml>`__ · :doc:`Catalogue </the-data/sources>` · :doc:`Review register </register>`

DOI: `10\.1063/1\.450825 <https://doi.org/10.1063/1.450825>`__

**Source kind:** measurement

**Recorded technique:** Laser\-induced fluorescence in a static Pyrex cell at 300 K\: two\-photon excitation of Xe 2p5, 2p6 and 2p9 \(6p\[1/2\]0, 6p\[3/2\]2, 6p\[5/2\]2\) from the ground state by a frequency\-doubled \(LFM crystal\) Nd\:YAG\-pumped dye laser \(Coumarin 500, about 10 ns, about 2 MW/cm2 in the loose focus, low enough to avoid multiphoton ionisation and stimulated emission\); one\-photon excitation of 2p7, 2p8 and 2p10 from Xe\(1s5\) made in the afterglow of a pulsed discharge \(Raman\-shifted dye laser\)\. 6p \-\> 6s fluorescence through a 1 m monochromator onto a cooled Hamamatsu R632\-01, digitised and averaged \(about 3000 shots\); detectivity calibrated with a tungsten\-iodine lamp and for polarisation\. Stern\-Volmer plots of the single\-exponential decay constants \(intercept 1/tau, slope k\_Q\) in xenon and, at 3\.0 Torr xenon, in argon; state\-to\-state rates from kinetic simulations of the product time profiles with Aymar and Coulombe's branching fractions \(velocity form\); fluorescence polarisation after two\-photon excitation with a Glan polariser\.

**Materials in structured entries:** Xe

**Dataset quantities:** collisional\_quenching\_rate\_coefficient, radiative\_lifetime

**Contents:** 20 datasets; 0 formulas.

Curation notes
--------------

J\. Chem\. Phys\. 84\(8\), 4304\-4316 \(15 April 1986\) = PDF pages 2\-14 \(PDF page 1 is the AIP download cover; journal page = PDF page \+ 4302\); a scanned \(raster\) PDF with an OCR text layer\. Identity checked on the first page of the article \(PDF p\. 2\: title 'Collisional deactivation of Xe\(5p56p\) states in Xe and Ar', J\. K\. Ku and D\. W\. Setser, Kansas State University, received 30 December 1985, accepted 10 January 1986, footer J\. Chem\. Phys\. 84 \(8\), 15 April 1986, 4304\) on 2026\-10\-09\. Tables I\-III checked cell by cell against the table images \(Table III also on the rendered page at 4x, for the stacked lines and the footnote marks\), the equations \(1a\)\-\(2d\) and \(4a\)\-\(5c\) on the rendered pages\.

LEVELS\. Paschen notation in the text and rows, Racah beside it in the tables and Fig\. 1\. NIST \(src/optmat/data/external/nist\_asd/Xe\_I\_levels\.tsv\)\: 2p5 = 6p\[1/2\]0 = 5p5\(2P\*3/2\)6p 2\[1/2\], J = 0 \(80118\.962 cm\-1\); 2p6 = 6p\[3/2\]2 = 2\[3/2\], J = 2 \(79212\.465\); 2p7 = 6p\[3/2\]1 = 2\[3/2\], J = 1 \(78956\.031\); 2p8 = 6p\[5/2\]3 = 2\[5/2\], J = 3 \(78403\.061\); 2p9 = 6p\[5/2\]2 = 2\[5/2\], J = 2 \(78119\.798\); 2p10 = 6p\[1/2\]1 = 2\[1/2\], J = 1 \(77269\.145\); 1s2 = 6s'\[1/2\]1 = 5p5\(2P\*1/2\)6s 2\[1/2\]\*, J = 1 \(77185\.041\); 1s3 = 6s'\[1/2\]0, J = 0 \(76196\.767\); 3d5 = 5d\[1/2\]1 = 5p5\(2P\*3/2\)5d 2\[1/2\]\*, J = 1 \(79986\.618; bruce\_1990's 5d\[1/2\]1\)\. Evidence\: Fig\. 1's twelve level energies \(80119\.47 for 2p5 \.\.\. 76197\.29 for 1s3, 79987\.16 for 3d5\) exceed NIST's by a uniform 0\.50\-0\.54 cm\-1 \(an older energy scale; script check\), and the gaps the text quotes, 2p7 \- 2p6 '256\.4 cm\-1' \(p\. 4312; NIST 256\.434\) and 3d5 '132 cm\-1 below Xe\(2p5\)' \(p\. 4308; NIST 132\.344\)\.

TAKEN \(radiative\_lifetime and collisional\_quenching\_rate\_coefficient, TC\-1011; extraction script tools/extract/ku\_1986\.py for the tables, inline points for the text\), 'This work' only, temperature 300 K \('at 300 K', abstract\)\: \- Table I \(p\. 4307\), in pure xenon\: radiative lifetimes \(ns\) 2p5 32\.6 \+\- 1\.0, 2p6 36\.0 \+\- 3\.0, 2p7 36\.7 \+\- 1\.0, 2p8 32\.3 \+\- 1\.0, 2p9 39\.3 \+\- 1\.0, 2p10 38\.2 \+\- 1\.0 \(tau\_Xe, primary\) and the total quenching rate constants k\_Q \(10^\-11 cm3 molecule\-1 s\-1\) 0\.58 \+\- 0\.05, 8\.2 \+\- 0\.5, 12\.8 \+\- 0\.4, 5\.3 \+\- 0\.3, 9\.6 \+\- 0\.3, 13\.3 \+\- 0\.5 \(kq\_self\_Xe, primary; 2p10 from the fast component\)\. The 'Slow component' after 2p10 excitation \(footnote g\), slope 3\.4 \+\- 0\.5 \(kq\_slow\_Xe, check\)\: the slope of the slow decay eigenvalue of the coupled 2p10 / 1s2 pair, not a level's removal coefficient \(the coupled\-pair caution of TC\-1016\); the text gives '3\.5 \+\- 0\.5 x 10^\-10' for the same slope \(p\. 4307\), a factor 10 and 0\.1 apart from the table \(doubt\)\. Uncertainty level not stated \('The statistical uncertainty \.\.\. was less than 10%', 'reliable, \+\-20%', pp\. 4307, 4313\)\. \- Table II \(p\. 4309\), in argon \(3\.0 Torr xenon\)\: k\_Ar 2p6 4\.7 \+\- 0\.5 and 2p9 8\.2 \+\- 0\.5 \(kq\_Ar\_Xe, primary\); 2p5's fast and slow components, 14\.0 \+\- 1\.0 \(footnote b\) and \(3\.0 \+\- 0\.5\) \(c\) \(kq\_Ar\_coupled\_Xe, check\: the slopes of the two decay eigenvalues of 2p5 coupled to 3d5, as bruce\_1990's kq\_Ar\_coupled\_Xe\); the radiative lifetimes from the argon intercepts less k\_Xe \[Xe\], 2p5 30 \+\- 2, 2p6 34 \+\- 2, 2p9 37 \+\- 2 \(tau\_Ar\_Xe, check\: the paper offers them as a consistency check of Table I, p\. 4308\)\. \- Text pp\. 4308\-4309, Eqs\. \(1a\)\-\(2c\), the rate assignments 'satisfactory for fitting the decay constants and the amplitude ratio for Xe\(2p5\) decay' in argon \(10^\-11 cm3 molecule\-1 s\-1\)\: 2p5 \+ Ar \-\> 3d5, 10\.0 \(k1a\_Ar, primary\) and \-\> other Xe\(6p\), 4\.0 \(k1b\_Ar, primary\), both 'reliable to \+\-20%'; 3d5 \+ Ar \-\> 2p5, 1\.8 \(k2a\_Ar, check\: from \(1a\) by detailed balance, script check\) and \-\> other Xe\(6p or 5d\), 2\.0 \(k2b\_Ar, check\: 'an unreliability \.\.\. of a factor of 2'\); 3d5 \+ Xe \-\> other Xe\(6p, 6s' or 6s\), 9\.5 \(k2c\_self, check\: tied to the assumed 2 us effective lifetime of the trapped 3d5; the conclusions call it 'the total quenching rate constant for Xe\(3d5\) \.\.\. inferred'\)\. Not taken\: tau\(2p5\) = 32 ns and tau\_eff\(3d5\) = 2 us \(model inputs\)\. \- Table III \(p\. 4310\), the state\-to\-state rate constants by xenon, one dataset per product \(channel\), the rows the reactants\: k\_2p6\_Xe \.\.\. k\_1s3\_6s\_Xe \(primary\), the upper limits 2p6 \-\> 2p10 and 2p9 \-\> 1s2, '\<0\.2', held as the interval 0\-0\.2 \(check\)\. Eqs\. \(4a\)\-\(5b\) repeat the 2p10 and 1s2 rows\.

NOT TAKEN\: Table I's 'Others' column and the parenthesised k\_Q \(Refs\. 7, 23\-28; reproduced\), the 1s3 row \(Ref\. 23\) and the slow component's intercept 330 \+\- 10 ns \(the coupled pair's, not a radiative lifetime\); Table II's previous values \(Refs\. 7, 8\); Table III's Gamma \(k\_ij / k\_Q, script check\) and tau columns \(the simulations' rounded inputs\); the figures \(their slopes and intercepts are the tables'\); the rate constants quoted for 6p' from Ref\. 25 \('26\-48 x 10^\-11', p\. 4307\)\. NOT TAKEN \(no quantity; collisional\_depolarization\_rate\_coefficient declined, TC\-1040\)\: the collisional depolarisation of two\-photon aligned 2p6 and 2p9 by xenon, from the decay of the degree of fluorescence polarisation, 5\.7 \+\- 0\.6 x 10^\-10 cm3 molecule\-1 s\-1 \(p\. 4306, Fig\. 2b, both levels together; abstract '~6 x 10^\-10'\), and from the polarisation index \(the alignment\), 9\.2 \+\- 2\.5 x 10^\-10 cm3 molecule\-1 s\-1, '\(290 \+\- 80 A2\)' \(p\. 4312\); the zero\-pressure degree of polarisation, \-0\.60 \(p\. 4306\) or \-0\.62 \+\- 0\.02 \(p\. 4312\), against \-1\.0 without hyperfine structure \(a hyperfine depolarisation; declined, TC\-1011, as hyperfine constants and anisotropy parameters\)\.

FINDING \(lifetimes, ns; NIST 1/sum A over Xe\_I\_lines\_nir\.tsv, TC\-985; bruce\_1990 and bowering\_1986b in brackets\)\. 2p5 32\.6 \+\- 1\.0 \(Ar intercept 30 \+\- 2\), NIST 27\.1 \(one line, 828\.24 nm, A = 3\.69e7, B; \[26\.8 \+\- 0\.8; 28 \+\- 1\]\)\: here 20 % longer than NIST and the other two\. 2p6 36\.0 \+\- 3\.0 \(Ar 34 \+\- 2\), NIST 27\.2 \(\[31\.3 \+\- 1\.8; 35 \+\- 3\]\)\: all experiments 15\-32 % above NIST\. 2p7 36\.7 \+\- 1\.0, NIST 37\.0\. 2p8 32\.3 \+\- 1\.0, NIST 33\.3 \(882\.18 nm, A\+\)\. 2p9 39\.3 \+\- 1\.0 \(Ar 37 \+\- 2\), NIST 39\.4 \(\[36\.0 \+\- 2\.8; 30 \+\- 4\]\)\. 2p10 38\.2 \+\- 1\.0, NIST 30\.4 \(bowering\_1986b 43\.8 \+\- 8\.0\)\. No 6p' or 7p level is measured, so the paper does not bear on bruce\_1990's 6p' disagreement with NIST \(TC\-1003, TC\-1010\); where it overlaps, NIST's 1/sum A is too short by 25 % for 2p6 and 2p10 and agrees for 2p7, 2p8 and 2p9\.

FINDING \(quenching, against bruce\_1990 and bowering\_1986b, 10^\-12 cm3/s\)\. By xenon\: 2p5 5\.8 \+\- 0\.5 \(5\.9 \+\- 0\.5; 5\.9 \+\- 3\.3\); 2p6 82 \+\- 5 \(101 \+\- 3; 92\.2 \+\- 4\.7\); 2p9 96 \+\- 3 \(116 \+\- 3; 86\.8 \+\- 5\.9\); 2p7 128 \+\- 4 \(89 \+\- 26\); 2p8 53 \+\- 3 \(39\.2 \+\- 4\.4\); 2p10 133 \+\- 5 \(295 \+\- 48\)\. By argon\: 2p6 47 \+\- 5 \(bruce 40 \+\- 2\.0\), 2p9 82 \+\- 5 \(82 \+\- 4\); 2p5's fast component 140 \+\- 10 against bruce\_1990's 200 \+\- 4\.0 and the slow 30 \+\- 5 against 5\.9 \+\- 0\.4, and the state\-to\-state 2p5 \-\> 3d5 100 \(\+\-20 %\) against k12 = 170 \+\- 3, 2p5 \-\> other 40 against k10 = 13 \+\- 6, 3d5 \-\> 2p5 18 against k21 = 30 \+\- 1, 3d5 \-\> other 20 against k20 = 4\.6 \+\- 1\.6\: Ku and Setser's 2p5/3d5 scheme rests on 3\-10\.6 Torr argon, an assumed 2 us 3d5 lifetime and a large 3d5 \+ Xe rate \(95, against bruce\_1990's measured 197 \+\- 26\); bruce\_1990's covers up to 400 Torr and supersedes it\. Detailed balance\: 3d5 \-\> 2p5 = \(1/3\) exp\(\-132\.34 cm\-1 / kT\) \(2p5 \-\> 3d5\) gives 1\.77, printed 1\.8 \(script check\)\.

BEARING ON OEP 8 \(scale only\)\: the depolarisation rate constants, 5\.7\-9\.2 x 10^\-10 cm3/s, are about 60\-110 times 2p5's quenching by xenon and 6\-10 times the other 6p levels'; elastic collisions dominate the 6p levels' collisional relaxation, as bowering\_1986b says for the linewidths\. Neither paper measures the pressure broadening of the two\-photon line \(gornik\_1981's 25 \+\- 15 MHz/Torr for 2p5, from Hawkins et al\., is 2\.4e\-9 cm3/s as a 1/T2 rate at 296 K, for scale\)\.

TWO\-PHOTON DATA CITED, NOT IN THE LIBRARY\: G\. Inoue, J\. K\. Ku and D\. W\. Setser, J\. Chem\. Phys\. 81, 5760 \(1984\) \(Ref\. 7; lifetimes of 22 Xe 6p, 6p', 7p and 6d levels in Ne and Ar\: the independent 6p' and 7p lifetimes to test bruce\_1990 against NIST\); H\. Horiguchi, R\. S\. F\. Chang and D\. W\. Setser, J\. Chem\. Phys\. 75, 1207 \(1981\) \(Ref\. 8; printed '15, 1207'\); R\. T\. Hawkins, H\. Egger, J\. Bokor and C\. K\. Rhodes, Appl\. Phys\. Lett\. 36, 391 \(1980\) \(Ref\. 13, the first two\-photon excitation of 2p5\); X\. Husson and J\. Margerie, Opt\. Commun\. 5, 139 \(1972\) \(Ref\. 27/33, zero\-field level\-crossing dealignment\); T\. Suzuki and K\. Shimoda, J\. Phys\. Soc\. Jpn\. 43, 233 \(1977\) \(Ref\. 28\)\. Held\: gornik\_1981 \(Ref\. 14\), raymond\_1984 \(Ref\. 15\), mccown\_1982 \(Ref\. 24\)\.

**Recorded bibliographic identity status:** VALIDATED\_WITH\_WARNINGS. This concerns identification of the source; it does not establish the scientific correctness of its contents.

Datasets
--------

ku\_1986/tau\_Xe
~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "tau_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__tau_Xe.csv",
     "table": "tbl_e76f9b89f7ed",
     "quantity": "radiative_lifetime",
     "unit": "ns",
     "abscissa": "label",
     "use": "primary",
     "parameters": {
       "method": "laser excitation (two-photon from the ground state, or one-photon from 1s5 in a discharge afterglow), time-resolved fluorescence, zero-pressure intercept of the Stern-Volmer plot in xenon"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table I \(p\. 4307\), 'Radiative lifetime \(ns\)', 'This work'\: the six 6p levels in pure xenon, 32\.3 \(2p8\) to 39\.3 ns \(2p9\); 2p5, 2p6, 2p9 two\-photon excited, 2p7, 2p8, 2p10 one\-photon excited from 1s5\. Uncertainty level not stated\. NIST 1/sum A\: 27\.1, 27\.2, 37\.0, 33\.3, 39\.4, 30\.4 ns \(record notes\)\.

ku\_1986/tau\_Ar\_Xe
~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "tau_Ar_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__tau_Ar_Xe.csv",
     "table": "tbl_c5ee4460f517",
     "quantity": "radiative_lifetime",
     "unit": "ns",
     "abscissa": "label",
     "use": "check",
     "parameters": {
       "method": "two-photon laser excitation in 3.0 Torr xenon with argon, zero-argon-pressure intercept less k_Xe [Xe]"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table II \(p\. 4309\), 'Radiative lifetime \(ns\)'\: 2p5 30 \+\- 2, 2p6 34 \+\- 2, 2p9 37 \+\- 2, 'obtained from the zero pressure intercepts shown in Fig\. 4 and subtraction of the k\_Xe \[Xe\] contribution using the Xe quenching rate constant in Table I' \(footnote a\)\. The paper offers them as a consistency check of Table I \(p\. 4308\)\.

ku\_1986/kq\_self\_Xe
~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "kq_self_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__kq_self_Xe.csv",
     "table": "tbl_e76f9b89f7ed",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "primary",
     "parameters": {
       "perturber": "self",
       "order": 2,
       "channel": "total",
       "temperature_k": 300,
       "method": "laser excitation, time-resolved fluorescence, slope of the Stern-Volmer plot in xenon (Fig. 3; 2p5 up to high pressure)"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table I \(p\. 4307\), k\_Q \(10^\-11 cm3 molecule\-1 s\-1\), 'This work' \(the parenthesised values are Refs\. 24 and 7\)\: total quenching of the six 6p levels by xenon, 0\.58 \(2p5\) to 13\.3 \(2p10, the fast component\)\. Uncertainty level not stated; 'reliable, \+\-20%' \(p\. 4313\)\.

ku\_1986/kq\_slow\_Xe
~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "kq_slow_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__kq_slow_Xe.csv",
     "table": "tbl_e76f9b89f7ed",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "check",
     "parameters": {
       "perturber": "self",
       "order": 2,
       "channel": "total",
       "temperature_k": 300,
       "method": "slope of the slow component's decay constant against xenon pressure after one-photon excitation of 2p10, the coupled 2p10 / 6s'[1/2]1 pair"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table I \(p\. 4307\), row 'Slow component' \(footnote g, 'Intercept and slope of the slow decay component from Xe\(2p10\) excitation'\)\: slope 3\.4 \+\- 0\.5 x 10^\-11, the slow decay eigenvalue of the coupled 2p10 / 1s2 pair \(Fig\. 3f, 2\.2\-3\.8 Torr and up\), not a level's removal coefficient; the text prints '3\.5 \+\- 0\.5 x 10^\-10' \(p\. 4307\)\. A check\.

ku\_1986/kq\_Ar\_Xe
~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "kq_Ar_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__kq_Ar_Xe.csv",
     "table": "tbl_c5ee4460f517",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "primary",
     "parameters": {
       "perturber": "Ar",
       "order": 2,
       "channel": "total",
       "temperature_k": 300,
       "method": "two-photon laser excitation in 3.0 Torr xenon, slope of the Stern-Volmer plot against argon pressure (Fig. 4)"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table II \(p\. 4309\), k\_Ar \(10^\-11 cm3 molecule\-1 s\-1\), 'This work'\: 2p6 4\.7 \+\- 0\.5 and 2p9 8\.2 \+\- 0\.5, single\-exponential decays up to 15 Torr argon in 3\.0 Torr xenon\. Uncertainty level not stated\.

ku\_1986/kq\_Ar\_coupled\_Xe
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "kq_Ar_coupled_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__kq_Ar_coupled_Xe.csv",
     "table": "tbl_c5ee4460f517",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "check",
     "parameters": {
       "perturber": "Ar",
       "order": 2,
       "channel": "total",
       "temperature_k": 300,
       "method": "two-photon excitation of 2p5 in 3.0 Torr xenon with 0-10.6 Torr argon, slopes of the fast and slow decay constants (Fig. 4c)"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table II \(p\. 4309\), 2p5 \(6p\[1/2\]0\) in argon\: rows '2p5 fast', 14\.0 \+\- 1\.0 \(footnote b, 'Obtained from the fast decay component'\), and '2p5 slow', \(3\.0 \+\- 0\.5\) \(c, the slow component, above 4 Torr argon\)\: the slopes of the two decay eigenvalues of 2p5 coupled to 3d5 \(5d\[1/2\]1\), not the levels' removal coefficients \(the coupled\-pair caution of TC\-1016\)\. bruce\_1990's kq\_Ar\_coupled\_Xe\: 20\.0 and 0\.59\. A check\.

ku\_1986/k1a\_Ar
~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k1a_Ar",
     "material": "Xe",
     "table": "text",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "primary",
     "parameters": {
       "perturber": "Ar",
       "order": 2,
       "channel": "3d5",
       "temperature_k": 300,
       "method": "rate scheme (Eqs. 1a-2d) fitted to the fast and slow decay constants and their amplitude ratio for 2p5 in 3.0 Torr xenon with up to 10.6 Torr argon"
     },
     "uncertainty": {
       "relative": 0.2,
       "level": "not stated"
     }
   }

1 inline points in the source record.

Eq\. \(1a\) \(p\. 4308, read on the rendered page\)\: Xe\(2p5\) \+ Ar \-\> Xe\(3d5\) \+ Ar, '10\.0 x 10^\-11'; 'k\(1a\) and k\(1b\) should be reliable to \+\-20%' \(p\. 4309\)\. bruce\_1990's k12\_Ar\: 17\.0 \+\- 0\.3 x 10^\-11\.

ku\_1986/k1b\_Ar
~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k1b_Ar",
     "material": "Xe",
     "table": "text",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "primary",
     "parameters": {
       "perturber": "Ar",
       "order": 2,
       "channel": "other Xe(6p) states",
       "temperature_k": 300,
       "method": "rate scheme (Eqs. 1a-2d) fitted to the fast and slow decay constants and their amplitude ratio for 2p5 in 3.0 Torr xenon with up to 10.6 Torr argon"
     },
     "uncertainty": {
       "relative": 0.2,
       "level": "not stated"
     }
   }

1 inline points in the source record.

Eq\. \(1b\) \(p\. 4308, read on the rendered page\)\: Xe\(2p5\) \+ Ar \-\> other Xe\(6p\) states \+ Ar, '4\.0 x 10^\-11'; reliable to \+\-20% \(p\. 4309\)\. bruce\_1990's k10\_Ar\: 1\.3 \+\- 0\.6 x 10^\-11\.

ku\_1986/k2a\_Ar
~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k2a_Ar",
     "material": "Xe",
     "table": "text",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "check",
     "parameters": {
       "perturber": "Ar",
       "order": 2,
       "channel": "2p5",
       "temperature_k": 300,
       "method": "detailed balance from Eq. (1a)"
     }
   }

1 inline points in the source record.

Eq\. \(2a\) \(p\. 4308, read on the rendered page\)\: Xe\(3d5\) \+ Ar \-\> Xe\(2p5\) \+ Ar, '1\.8 x 10^\-11', 'determined from Eq\. \(1a\) plus detailed balance' \(p\. 4309; script check\: 1\.77\)\. No uncertainty stated\. bruce\_1990's k21\_Ar\: 3\.0 \+\- 0\.1 x 10^\-11\.

ku\_1986/k2b\_Ar
~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k2b_Ar",
     "material": "Xe",
     "table": "text",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "check",
     "parameters": {
       "perturber": "Ar",
       "order": 2,
       "channel": "other Xe(6p or 5d) states",
       "temperature_k": 300,
       "method": "rate scheme (Eqs. 1a-2d) fitted to the 2p5 decay in argon, with tau_eff(3d5) = 2 us assumed"
     }
   }

1 inline points in the source record.

Eq\. \(2b\) \(p\. 4308, read on the rendered page\)\: Xe\(3d5\) \+ Ar \-\> other Xe\(6p or 5d\) states \+ Ar, '2\.0 x 10^\-11'; the uncertain 3d5 effective lifetime 'introduces an unreliability in k\(2b\) of a factor of 2' \(p\. 4309\)\. bruce\_1990's k20\_Ar\: 0\.46 \+\- 0\.16 x 10^\-11\.

ku\_1986/k2c\_self
~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k2c_self",
     "material": "Xe",
     "table": "text",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "check",
     "parameters": {
       "perturber": "self",
       "order": 2,
       "channel": "other Xe(6p, 6s' or 6s) states",
       "temperature_k": 300,
       "method": "rate scheme (Eqs. 1a-2d) fitted to the slow decay constant of 2p5 in 3.0 Torr xenon with argon, tau_eff(3d5) = 2 us assumed"
     }
   }

1 inline points in the source record.

Eq\. \(2c\) \(p\. 4309, read on the rendered page\)\: Xe\(3d5\) \+ Xe \-\> other Xe\(6p, 6s', or 6s\) states \+ Xe, '9\.5 x 10^\-11', needed 'to fit the magnitude of lambda\_\- given our choice of an effective lifetime for Xe\(3d5\) of about 2 us' and smaller if that lifetime is shorter \(p\. 4309\); the conclusions call it the total rate 'inferred' \(p\. 4316\)\. No uncertainty stated\. bruce\_1990's measured 5d\[1/2\]1 \+ Xe\: 19\.7 \+\- 2\.6 x 10^\-11\.

ku\_1986/k\_2p6\_Xe
~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_2p6_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__k_2p6_Xe.csv",
     "table": "tbl_0fc2938f26a2",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "primary",
     "parameters": {
       "perturber": "self",
       "order": 2,
       "channel": "2p6",
       "temperature_k": 300,
       "method": "one- or two-photon laser excitation, time profiles of the excited and product 6p -> 6s fluorescence at 0.5-10 Torr, rate constants adjusted in a kinetic simulation (Eqs. 3a-3c) to match the profiles and integrated intensities"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table III \(p\. 4310\), k\_ij \(10^\-11 cm3 molecule\-1 s\-1\) by xenon into 6p\[3/2\]2 \(2p6\)\: from 2p7, 0\.6 \+\- 0\.2\. Rows are the reactants \(Paschen\)\. 'Assigned from computer simulations of time profiles for initial and product states; the error limits were assigned by considering the sensitivity of the calculated results to the best determined aspects of the data' \(footnote b\); level not stated\.

ku\_1986/k\_2p7\_Xe
~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_2p7_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__k_2p7_Xe.csv",
     "table": "tbl_0fc2938f26a2",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "primary",
     "parameters": {
       "perturber": "self",
       "order": 2,
       "channel": "2p7",
       "temperature_k": 300,
       "method": "one- or two-photon laser excitation, time profiles of the excited and product 6p -> 6s fluorescence at 0.5-10 Torr, rate constants adjusted in a kinetic simulation (Eqs. 3a-3c) to match the profiles and integrated intensities"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table III \(p\. 4310\), k\_ij \(10^\-11 cm3 molecule\-1 s\-1\) by xenon into 6p\[3/2\]1 \(2p7\)\: from 2p6, 1\.3 \+\- 0\.2\. Rows are the reactants \(Paschen\)\. 'Assigned from computer simulations of time profiles for initial and product states; the error limits were assigned by considering the sensitivity of the calculated results to the best determined aspects of the data' \(footnote b\); level not stated\.

ku\_1986/k\_2p8\_Xe
~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_2p8_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__k_2p8_Xe.csv",
     "table": "tbl_0fc2938f26a2",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "primary",
     "parameters": {
       "perturber": "self",
       "order": 2,
       "channel": "2p8",
       "temperature_k": 300,
       "method": "one- or two-photon laser excitation, time profiles of the excited and product 6p -> 6s fluorescence at 0.5-10 Torr, rate constants adjusted in a kinetic simulation (Eqs. 3a-3c) to match the profiles and integrated intensities"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table III \(p\. 4310\), k\_ij \(10^\-11 cm3 molecule\-1 s\-1\) by xenon into 6p\[5/2\]3 \(2p8\)\: from 2p6, 2\.1 \+\- 0\.2; 2p7, 6\.0 \+\- 2\.0; 2p9, 1\.1 \+\- 0\.2\. Rows are the reactants \(Paschen\)\. 'Assigned from computer simulations of time profiles for initial and product states; the error limits were assigned by considering the sensitivity of the calculated results to the best determined aspects of the data' \(footnote b\); level not stated\.

ku\_1986/k\_2p9\_Xe
~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_2p9_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__k_2p9_Xe.csv",
     "table": "tbl_0fc2938f26a2",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "primary",
     "parameters": {
       "perturber": "self",
       "order": 2,
       "channel": "2p9",
       "temperature_k": 300,
       "method": "one- or two-photon laser excitation, time profiles of the excited and product 6p -> 6s fluorescence at 0.5-10 Torr, rate constants adjusted in a kinetic simulation (Eqs. 3a-3c) to match the profiles and integrated intensities"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table III \(p\. 4310\), k\_ij \(10^\-11 cm3 molecule\-1 s\-1\) by xenon into 6p\[5/2\]2 \(2p9\)\: from 2p6, 2\.8 \+\- 0\.2; 2p8, 3\.1 \+\- 0\.2\. Rows are the reactants \(Paschen\)\. 'Assigned from computer simulations of time profiles for initial and product states; the error limits were assigned by considering the sensitivity of the calculated results to the best determined aspects of the data' \(footnote b\); level not stated\.

ku\_1986/k\_2p10\_Xe
~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_2p10_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__k_2p10_Xe.csv",
     "table": "tbl_0fc2938f26a2",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "primary",
     "parameters": {
       "perturber": "self",
       "order": 2,
       "channel": "2p10",
       "temperature_k": 300,
       "method": "one- or two-photon laser excitation, time profiles of the excited and product 6p -> 6s fluorescence at 0.5-10 Torr, rate constants adjusted in a kinetic simulation (Eqs. 3a-3c) to match the profiles and integrated intensities"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table III \(p\. 4310\), k\_ij \(10^\-11 cm3 molecule\-1 s\-1\) by xenon into 6p\[1/2\]1 \(2p10\)\: from 2p8, 0\.4 \+\- 0\.2; 2p9, 4\.5 \+\- 0\.2; 1s2, 6\.7 \+\- 0\.7 \(footnote e, 'assigned from detailed balance' with 2p10 \-\> 1s2; script check\)\. Rows are the reactants \(Paschen\)\. 'Assigned from computer simulations of time profiles for initial and product states; the error limits were assigned by considering the sensitivity of the calculated results to the best determined aspects of the data' \(footnote b\); level not stated\.

ku\_1986/k\_1s2\_Xe
~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_1s2_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__k_1s2_Xe.csv",
     "table": "tbl_0fc2938f26a2",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "primary",
     "parameters": {
       "perturber": "self",
       "order": 2,
       "channel": "1s2",
       "temperature_k": 300,
       "method": "one- or two-photon laser excitation, time profiles of the excited and product 6p -> 6s fluorescence at 0.5-10 Torr, rate constants adjusted in a kinetic simulation (Eqs. 3a-3c) to match the profiles and integrated intensities"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table III \(p\. 4310\), k\_ij \(10^\-11 cm3 molecule\-1 s\-1\) by xenon into 6s'\[1/2\]1 \(1s2\)\: from 2p8, 0\.4 \+\- 0\.2; 2p10, 10\.0 \+\- 2\.0 \(from the amplitude ratio and pressure dependence of the 2p10 decay components, Eq\. 4a\)\. Rows are the reactants \(Paschen\)\. 'Assigned from computer simulations of time profiles for initial and product states; the error limits were assigned by considering the sensitivity of the calculated results to the best determined aspects of the data' \(footnote b\); level not stated\.

ku\_1986/k\_1s3\_6s\_Xe
~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_1s3_6s_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__k_1s3_6s_Xe.csv",
     "table": "tbl_0fc2938f26a2",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "primary",
     "parameters": {
       "perturber": "self",
       "order": 2,
       "channel": "1s3 or Xe(6s)",
       "temperature_k": 300,
       "method": "one- or two-photon laser excitation, time profiles of the excited and product 6p -> 6s fluorescence at 0.5-10 Torr, rate constants adjusted in a kinetic simulation (Eqs. 3a-3c) to match the profiles and integrated intensities"
     },
     "uncertainty": {
       "column": true,
       "level": "not stated"
     }
   }

Table III \(p\. 4310\), k\_ij \(10^\-11 cm3 molecule\-1 s\-1\) by xenon into '1s3 or Xe\(6s\)', 6s'\[1/2\]0 or the 6s levels, unresolved\: from 2p6, 1\.9 \+\- 0\.2; 2p7, 6\.2 \+\- 2\.0; 2p8, 1\.4 \+\- 0\.2; 2p9, 4\.0 \+\- 0\.2; 2p10, 3\.3 \+\- 2\.0; 1s2, 0\.70 \+\- 0\.3 \(footnote f, fitted to the slow component of 2p10\)\. Apart from 1s2's, each closes the reactant's sum to Table I's k\_Q \(footnote d, 'Assigned by difference', which no cell carries; script check\)\. Rows are the reactants \(Paschen\)\. 'Assigned from computer simulations of time profiles for initial and product states; the error limits were assigned by considering the sensitivity of the calculated results to the best determined aspects of the data' \(footnote b\); level not stated\.

ku\_1986/k\_2p10\_bound\_Xe
~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_2p10_bound_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__k_2p10_bound_Xe.csv",
     "table": "tbl_0fc2938f26a2",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "check",
     "parameters": {
       "perturber": "self",
       "order": 2,
       "channel": "2p10",
       "temperature_k": 300,
       "method": "kinetic simulation of the fluorescence time profiles (Eqs. 3a-3c); an upper limit"
     },
     "uncertainty": {
       "column": true,
       "level": "bound"
     }
   }

Table III \(p\. 4310\), 2p6 \-\> 2p10\: printed '\<0\.2' \(10^\-11 cm3 molecule\-1 s\-1\), an upper limit; held as the interval 0 to 0\.2, value 0\.1 with a bound half\-width 0\.1 \(printed keeps '\<0\.2'\)\.

ku\_1986/k\_1s2\_bound\_Xe
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_1s2_bound_Xe",
     "material": "Xe",
     "file": "Xe/ku_1986__k_1s2_bound_Xe.csv",
     "table": "tbl_0fc2938f26a2",
     "quantity": "collisional_quenching_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-11,
     "abscissa": "label",
     "use": "check",
     "parameters": {
       "perturber": "self",
       "order": 2,
       "channel": "1s2",
       "temperature_k": 300,
       "method": "kinetic simulation of the fluorescence time profiles (Eqs. 3a-3c); an upper limit"
     },
     "uncertainty": {
       "column": true,
       "level": "bound"
     }
   }

Table III \(p\. 4310\), 2p9 \-\> 1s2\: printed '\<0\.2' \(10^\-11 cm3 molecule\-1 s\-1\), an upper limit; held as the interval 0 to 0\.2, value 0\.1 with a bound half\-width 0\.1 \(printed keeps '\<0\.2'\)\.

Formulas
--------

No formulas are recorded.

Corrections
-----------

No dataset errata are recorded in this source record.

Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the :doc:`review register </register>` for the checks and decisions.