balakrishnan_1994 ================= A\. Balakrishnan, V\. Smith and B\. P\. Stoicheff, "Dissociation energies of the hydrogen and deuterium molecules", Phys\. Rev\. A 49, 2460 \(1994\) `Source record `__ · :doc:`Catalogue ` · :doc:`Review register ` DOI: `10\.1103/PhysRevA\.49\.2460 `__ **Source kind:** measurement **Recorded technique:** Single\-photon fluorescence\-excitation spectroscopy of H2 and D2 near 84 nm \(Sec\. II\)\: tunable XUV at 2 nu1 \+ nu2 by four\-wave sum mixing in a pulsed effusive jet of krypton \(1 mm nozzle, about 2 atm backing\), nu1 \(about 212\.6 nm, about 15 kW, from a doubled grazing\-incidence dye laser, 0\.2 cm^\-1\) tuned to the two\-photon resonance 4p6 \-\> 4p5 5p\[1/2\]0 of Kr and nu2 \(400\-425 nm, a single\-mode dye laser, 0\.02 cm^\-1, about 55 kW\) scanned; both focused by a 25 cm lens, at about 8e8 and 2e9 W/cm2; XUV pulses of about 4 ns, bandwidth 0\.25 cm^\-1\. The XUV crossed a pulsed H2 or D2 jet 50 mm below its nozzle; the H\(2s\) or D\(2s\) atoms from photodissociation above the second dissociation limit, H2\(B' 1Sigma\_u\+\) \-\> H\(1s\) \+ H\(2s\), were quenched by a delayed electric field \(50\-150 V/cm\) and their Lyman\-alpha fluorescence detected, so that the onset of the continuum is free of molecular lines\. nu2 was calibrated on uranium optogalvanic lines \(\+\-0\.01 cm^\-1\); 2 nu1 in a separate experiment from the maximum of the Kr\-resonant third harmonic \(near 70\.9 nm\) with the single\-mode laser doubled to nu1 at the same intensity \(p\. 2464\)\. The limit D\_L was found by linear extrapolation of the onset; D0 = D\_L \- E\(2s \- 1s\)\. **Materials in structured entries:** D2, D2\+, H2, H2\+, Kr **Dataset quantities:** dissociation\_energy, level\_energy, light\_shift\_coefficient **Contents:** 24 datasets; 0 formulas. Curation notes -------------- Phys\. Rev\. A 49\(4\), 2460\-2469 \(April 1994\) = PDF pages 1\-10 \(journal page = PDF page \+ 2459\); a scan with a text layer\. Identity checked against the first page \(PHYSICAL REVIEW A VOLUME 49, NUMBER 4, APRIL 1994; received 30 September 1993; Balakrishnan, Smith and Stoicheff, Toronto\) on 2026\-10\-09\. brandi\_2002 \(TC\-1006, TC\-1017\) cites this paper as 'Phys\. Rev\. A 48, 2460 \(1994\)'\: the volume is 49\. Every number below was read on the rendered pages \(pp\. 2460, 2464, 2466\-2468\) and Table III's image\. WHAT IS TAKEN\. \(1\) Table III \(p\. 2468, tbl\_26f7348398d0; tools/extract/ balakrishnan\_1994\.py\), dissociation\_energy, cm^\-1, one file per row and molecule\: this paper's D0\(H2\) = 36 118\.11\+\-0\.08 and D0\(D2\) = 36 748\.38\+\-0\.07 \(primary; the 'Present \[4,10\]' row\) and D0\(H2\+\) = 21 379\.37\+\-0\.08 and D0\(D2\+\) = 21 711\.64\+\-0\.07 \(the 'Present \[10\]' row; check\: derived from D0 with other laboratories' ionisation energies, D0\(ion\) = D0 \+ I\(atom\) \- I\(molecule\), p\. 2468\); and the other rows, reproduced \(Herzberg 1970; Stwalley 1970; LeRoy and Barwell 1975; McCormack and Eyler 1991; Eyler and Melikechi 1993; the theories of Wolniewicz 1993, Kolos, Szalewicz and Monkhorst 1986, and Wolniewicz and Orlikowski 1991\)\. The uncertainties are printed '\+\-', with no stated level; Table II \(p\. 2467\) gives the budget\: extrapolation 0\.04, nu2 0\.01 \(D2 0\.015\), 2 nu1 0\.04, ac Stark 0\.03, Doppler 0\.01 \(D2 0\.008\), added in quadrature, plus the H\(1s\) hyperfine 0\.013 added linearly for H2 \(0\.024 in the 1992 Letter, halved here by a symmetry argument, p\. 2467\)\. \(2\) Text values, inline\: the second dissociation limits D\_L\(H2\) = 118 377\.06\+\-0\.04 and D\_L\(D2\) = 119 029\.72\+\-0\.04 cm^\-1 above X\(v = 0, J'' = 0\) \(abstract; pp\. 2465\-2466; products H\(1s\) \+ H\(2s\), the directly measured quantity, primary\); D\_L\(D2\) = 119 029\.71\+\-0\.09 from the J'' = 2 spectrum \(118 850\.68\+\-0\.09 \+ F''\(2\) = 179\.029, p\. 2466; a confirmation, check\); De\(H2\) = 38 297\.38\+\-0\.10 and De\(D2\) = 38 294\.87\+\-0\.09 \(pp\. 2465\-2466; D0 plus Huber and Herzberg's zero\-point energies 2179\.27 and 1546\.49\+\-0\.05, so check\)\. \(3\) Krypton, the calibration \(pp\. 2464, 2466\-2467\)\: the light shift of the two\-photon resonance 4p6 \-\> 5p\[1/2\]0, '\(8\.6\+\-3\.8\) x 10^\-11 cm\-1/W/cm2' from 'measurements at different power of nu1' \(light\_shift\_coefficient, primary, ls\_5p12\_0\); and the level energy extrapolated to zero intensity, '2 nu1 = 94 092\.93\+\-0\.05 cm\-1' \(level\_energy, check, level\_5p12\_0\)\. CHECKED \(the script\)\. D\_L\(H2\) = 118 258\.57 \(from J'' = 1, p\. 2465\) \+ F''\(1\) = 118\.49 = 118 377\.06; D0 = D\_L \- E\(2s \- 1s\) with 82 258\.954 \(H\) and 82 281\.336 \(D\) gives 36 118\.106 and 36 748\.384; De = D0 \+ zero\-point energy; D0\(H2\+\) = 36 118\.11 \+ 109 678\.764 \- 124 417\.500 = 21 379\.374 and D0\(D2\+\) = 36 748\.38 \+ 109 708\.617 \- 124 745\.353 = 21 711\.644; Table II's budget gives 0\.079 \(H2\) and 0\.066 \(D2\), printed 0\.08 and 0\.07; the 0\.07 cm^\-1 between 94 093\.00 \(at about 8e8 W/cm2\) and 94 092\.93 \(zero intensity\) over 8e8 W/cm2 is 8\.8e\-11 cm^\-1 per W/cm2, inside 8\.6\+\-3\.8\. All within the printed digits\. DOUBT\: the text calls 124 417\.500\+\-0\.01 'the average of' Gilligan and Eyler's 124 417\.507\+\-0\.018 and Jungen et al\.'s 124 417\.484\+\-0\.017 \(p\. 2468\); their mean is 124 417\.4955 \(the script allows 0\.005\)\. D0\(H2\+\) follows the printed 124 417\.500; with the mean it would be 21 379\.379, which rounds to 21 379\.38\. Not an erratum\: no value taken depends on it beyond the last digit of D0\(H2\+\)\. FINDINGS \(comparison with held records\)\. H2\: D0 = 36 118\.11\+\-0\.08 lies 0\.04 cm^\-1 above liu\_2009's 36 118\.069 62\(37\) and komasa\_2011's theory 36 118\.0696\(11\) \(both in those records' notes; no H2 dissociation\_energy dataset was held before this record\), inside the uncertainty; Eyler and Melikechi's 36 118\.06\+\-0\.04 \(reproduced here\) is 0\.01 below\. D2\: 36 748\.38\+\-0\.07 lies 0\.017 above liu\_2010's 36 748\.362 86\(68\)\. D0\(H2\+\) = 21 379\.37\+\-0\.08 against liu\_2009's 21 379\.350 \(notes\)\: 0\.02\. The ionisation energies the paper uses\: Gilligan and Eyler's I\(H2\) 124 417\.507\+\-0\.018 is liu\_2009's gilligan\_1992\_H2 \(124 417\.507\(18\)\); Jungen et al\.'s 124 417\.484\+\-0\.017 differs from liu\_2009's jungen\_1990\_H2 \(124 417\.501\(17\), the value the 1992 Letter used\) by \-0\.017 \('Both values rely on a measurement by the first group and incorporate a recent change reported by them', p\. 2468\); I\(D2\) = 124 745\.353\+\-0\.024, which the text gives with I\(D\) 'from Jungen et al\. \[28,30\]', is liu\_2010's gilligan\_1992\_D2 \(124 745\.353\(24\)\), not its jungen\_1990\_D2 \(124 745\.49\(11\)\)\: the attribution reads as I\(D\) only\. KRYPTON, FOR OEP 8 \(ls\_5p12\_0\)\. 8\.6e\-11 cm^\-1 per W/cm2 is 2\.58 Hz/\(W cm\-2\) \(times c = 2\.99792458e10 cm/s; the dataset's scale, 0\.299792458, does it\), and \+\-3\.8e\-11 is \+\-1\.14\: the '2\.6\(1\.1\) Hz \(W cm\-2\)\-1' that brandi\_2002 \(ls\_5p12\_0\_stoicheff, TC\-1017\) reproduces, to the digits printed\. It is the shift of 2 nu1 at the maximum of the resonance\-enhanced third harmonic \(the measured 2 nu1 at the experiments' intensity, 94 093\.00\+\-0\.04, lies above the zero\-intensity value, so a shift to the blue\), measured in natural krypton \('predominantly 84Kr', p\. 2467\) in the jet used for the mixing\. The intensity is that of nu1 at the focus; the paper states the value \(about 8e8 W/cm2, p\. 2462\) but not how it was obtained \(no spot size or pulse definition\), nor the intensities of the series, the number of points or the polarisation\. No Stark shift was detectable from nu2 up to 2\.6e9 W/cm2 \(p\. 2467\)\. Against brandi\_2002's 0\.75\(48\) Hz/\(W cm\-2\) \(84Kr, collision\-free beam, power density = pulse energy over 6 ns and the focal area, 50 % uncertainty\) the difference is 1\.8, 1\.5 times the combined uncertainty; brandi\_2002 calls them 'of the same order of magnitude'\. In OEP 8's convention brandi\_2002's record gives \-16\(10\) au for 0\.75; the same conversion of 2\.58 gives about \-55 au \(a derived number, not recorded as data\)\. The Stoicheff group's value is not in the 1992 Letter \(balakrishnan\_1992\), which brandi\_2002 also cites for it\. KRYPTON LEVEL \(level\_5p12\_0\)\. 94 092\.93\+\-0\.05 cm^\-1 \(natural Kr, extrapolated to zero nu1 intensity\) against brandi\_2002's 84Kr value 94 092\.8627 \(its 86Kr 94 092\.8673\(13\) plus its isotope shift\) and NIST's 94 092\.8626\: \+0\.067, 1\.3 times the uncertainty\. The paper's own comparison value, Trickl et al\.'s 94 092\.856\+\-0\.007 cm^\-1 for 86Kr \(\[23\]\: T\. Trickl \(private communication\); Phys\. Rev\. A 39, 2948 \(1989\)\), is 0\.011 below brandi\_2002's 86Kr value; not taken \(a private communication; the library's Trickl\_1989 is a different paper, on N2\)\. NOT TAKEN\: 2 nu1 = 94 093\.00\+\-0\.04 \(pp\. 2464, 2466; the 1992 Letter's value\), the level light shifted at about 8e8 W/cm2, not a level energy; nu1/2 = 23 523\.25\+\-0\.01 cm^\-1 \(p\. 2464\), its half\. NOT TAKEN \(inputs reproduced from others, held elsewhere or not a quantity of the gases\)\: F''\(1\) of H2 118\.49 \(Foltz et al\.\), F''\(2\) of D2 179\.029\+\-0\.004 \(Brannon et al\.\), the zero\-point energies \(Huber and Herzberg\), the 2s \- 1s intervals of H \(Andreae et al\. 1992\) and D \(Boshier et al\. 1987\), I\(H\) = 109 678\.764\+\-0\.01 \(Erickson 1977\), I\(D\) = 109 708\.617, I\(H2\) and I\(D2\) \(above; held by liu\_2009 and liu\_2010\); the D\_L\(H2\) above J'' = 1, 118 258\.57\+\-0\.04 \(p\. 2465; the limit from a level that is not the ground state\); the para\-H2 estimate 'about 118 377\.0' \(p\. 2465\); HD\: D0 = 36 405\.88\+\-0\.10 \(Eyler and Melikechi\) and 36 405\.83\+\-0\.10 \(Balakrishnan, Vallet and Stoicheff, J\. Mol\. Spectrosc\. 162, 168 \(1993\)\) against theory 36 405\.774\+\-0\.01 \(p\. 2468\)\: HD is not an optmat material; the H\(2s\) decay time in the H2 jet, 516\+\-10 ns at 50 mm from the nozzle \(collisional quenching by H2, p\. 2463; no density given, so no rate coefficient\), and the 2p lifetime '1\.6 ns' \(p\. 2463, uncited\); the Doppler shifts \(\+0\.008\+\-0\.01 and \+0\.006\+\-0\.008 cm^\-1\) and the beam velocity \(2\.1\+\-0\.3\) x 10^3 m/s \(p\. 2467\); Table I \(dyes\); the figures \(spectra; no numbers beyond those printed in the text\)\. FURTHER DATA CITED, NOT IN THE LIBRARY \(checked by folder name\)\: A\. Balakrishnan and B\. P\. Stoicheff, J\. Mol\. Spectrosc\. 156, 517 \(1992\) \(the D2 letter, \[10\]\); E\. E\. Eyler and N\. Melikechi, Phys\. Rev\. A 48, R18 \(1993\); T\. Trickl et al\., Phys\. Rev\. A 39, 2948 \(1989\) \(Kr 5p\[1/2\]0\); G\. Hilber, A\. Lago and R\. Wallenstein, J\. Opt\. Soc\. Am\. B 4, 1753 \(1987\) \(four\-wave mixing in a Kr jet near 80 nm\); L\. Wolniewicz, J\. Chem\. Phys\. 99, 1851 \(1993\)\. No two\-photon cross section, line width or pressure shift of the Kr line is given\. **Recorded bibliographic identity status:** VALIDATED\_WITH\_WARNINGS. This concerns identification of the source; it does not establish the scientific correctness of its contents. Datasets -------- balakrishnan\_1994/d0\_H2 ~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "d0_H2", "material": "H2", "file": "H2/balakrishnan_1994__d0_H2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "primary", "parameters": { "kind": "D0", "products": "H(1s) + H(1s)", "initial_state": "X 1Sigma_g+ (v = 0, J = 0), para-H2" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Experiment, 'Present \[4,10\]', H2\: '36 118\.11±0\.08'; also the abstract and p\. 2466\. D\_L\(H2\) = 118 377\.06\+\-0\.04 minus E\(2s\) \- E\(1s\) = 82 258\.954 \(Andreae et al\. 1992\)\. The uncertainty is Table II's budget \(record notes\), level not stated\. The 1992 Letter \(balakrishnan\_1992\) printed the same value from the same spectra with a hyperfine allowance of 0\.024 instead of 0\.013\. balakrishnan\_1994/d0\_D2 ~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "d0_D2", "material": "D2", "file": "D2/balakrishnan_1994__d0_D2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "primary", "parameters": { "kind": "D0", "products": "D(1s) + D(1s)", "initial_state": "X 1Sigma_g+ (v = 0, J = 0), ortho-D2" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Experiment, 'Present \[4,10\]', D2\: '36 748\.38±0\.07'; also the abstract and p\. 2466\. D\_L\(D2\) = 119 029\.72\+\-0\.04 \(ortho\-D2, J'' = 0\) minus the 2s \- 1s interval of D, 82 281\.336 \(Boshier et al\. 1987\)\. First reported in Balakrishnan and Stoicheff, J\. Mol\. Spectrosc\. 156, 517 \(1992\) \(not in the library\)\. Level not stated\. balakrishnan\_1994/d0\_H2\+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "d0_H2+", "material": "H2+", "file": "H2+/balakrishnan_1994__d0_H2+.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "check", "parameters": { "kind": "D0", "products": "H(1s) + H+", "initial_state": "X 2Sigma_g+ (v+ = 0, N+ = 0)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Experiment, 'Present \[10\]', H2\+\: '21 379\.37±0\.08'; p\. 2468\: D0\(H2\+\) = D0\(H2\) \+ I\(H\) \- I\(H2\) with I\(H\) = 109 678\.764 \(Erickson 1977\) and I\(H2\) = 124 417\.500 \(the paper's average of Gilligan and Eyler's and Jungen et al\.'s values; see the record's DOUBT\)\. Derived from other laboratories' ionisation energies, so check\. Level not stated\. balakrishnan\_1994/d0\_D2\+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "d0_D2+", "material": "D2+", "file": "D2+/balakrishnan_1994__d0_D2+.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "check", "parameters": { "kind": "D0", "products": "D(1s) + D+", "initial_state": "X 2Sigma_g+ (v+ = 0, N+ = 0)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Experiment, 'Present \[10\]', D2\+\: '21 711\.64±0\.07'; p\. 2468\: D0\(D2\) \+ I\(D\) \- I\(D2\) with I\(D2\) = 124 745\.353\+\-0\.024 and I\(D\) = 109 708\.617\. Derived, so check\. Level not stated\. balakrishnan\_1994/dl\_H2 ~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "dl_H2", "material": "H2", "table": "text", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "primary", "parameters": { "kind": "D0", "products": "H(1s) + H(2s)", "initial_state": "X 1Sigma_g+ (v = 0, J = 0)" }, "uncertainty": { "column": true, "level": "not stated" } } 1 inline points in the source record. Abstract and p\. 2466\: the second dissociation limit D\_L\(H2\) = 118 377\.06\+\-0\.04 cm^\-1 above X\(v = 0, J'' = 0\)\: measured from J'' = 1 \(ortho\-H2, Fig\. 6\) as 118 258\.57\+\-0\.04 \(p\. 2465; the weighted average of two runs of 10\-15 scans\) plus F''\(1\) = 118\.49 \(Foltz et al\.\)\. The \+\-0\.04 is the extrapolation error alone \(Table II\); the calibration of 2 nu1 and nu2, the ac Stark and Doppler terms enter D0's 0\.08\. The para\-H2 spectrum \(Fig\. 7\) gives about 118 377\.0\. Level not stated\. balakrishnan\_1994/dl\_D2 ~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "dl_D2", "material": "D2", "table": "text", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "primary", "parameters": { "kind": "D0", "products": "D(1s) + D(2s)", "initial_state": "X 1Sigma_g+ (v = 0, J = 0)" }, "uncertainty": { "column": true, "level": "not stated" } } 1 inline points in the source record. Abstract and p\. 2466\: D\_L\(D2\) = 119 029\.72\+\-0\.04 cm^\-1 from the ortho\-D2 \(J'' = 0\) spectrum \(Fig\. 8\), from a fit of a sloped step convolved with the 0\.25 cm^\-1 line shape\. The \+\-0\.04 is the extrapolation error \(Table II\)\. Level not stated\. balakrishnan\_1994/dl\_D2\_j2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "dl_D2_j2", "material": "D2", "table": "text", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "check", "parameters": { "kind": "D0", "products": "D(1s) + D(2s)", "initial_state": "X 1Sigma_g+ (v = 0, J = 0)" }, "uncertainty": { "column": true, "level": "not stated" } } 1 inline points in the source record. p\. 2466\: from the weak J'' = 2 spectrum \(Fig\. 9\), threshold 118 850\.68\+\-0\.09 plus F''\(2\) = 179\.029\+\-0\.004 \(Brannon et al\. 1968\), 'confirming the more precise value obtained from the ortho\-D2 \(J'' = 0\) spectrum' \(dl\_D2\)\. Level not stated\. balakrishnan\_1994/de\_H2 ~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "de_H2", "material": "H2", "table": "text", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "check", "parameters": { "kind": "De", "products": "H(1s) + H(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } 1 inline points in the source record. p\. 2466 \(displayed\)\: De\(H2\) = 38 297\.38\+\-0\.10 cm^\-1, D0 plus the zero\-point energy 2179\.27\+\-0\.05 of Huber and Herzberg \(1979\)\. Derived with another source's constant, so check\. Level not stated\. balakrishnan\_1994/de\_D2 ~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "de_D2", "material": "D2", "table": "text", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "check", "parameters": { "kind": "De", "products": "D(1s) + D(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } 1 inline points in the source record. p\. 2466 \(displayed\)\: De\(D2\) = 38 294\.87\+\-0\.09 cm^\-1, D0 plus the zero\-point energy 1546\.49\+\-0\.05 of Huber and Herzberg \(1979\)\. Derived, so check\. Level not stated\. balakrishnan\_1994/ls\_5p12\_0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "ls_5p12_0", "material": "Kr", "table": "text", "quantity": "light_shift_coefficient", "unit": "Hz/(W/cm2)", "scale": 0.299792458, "abscissa_unit": "nm", "wavelength_medium": "vacuum", "use": "primary", "parameters": { "final_level": "5p[1/2]0 = 4s2.4p5.(2P*<3/2>).5p 2[1/2] J = 0", "photons": 2, "intensity_definition": "the intensity of the nu1 beam (about 15 kW peak, 3 ns pulses at about 212.6 nm) at the focus of a 25 cm lens, about 8e8 W/cm2 in the dissociation experiments (p. 2462); how the intensity was obtained (spot size, pulse definition) is not stated", "method": "maximum of the Kr-resonant third harmonic (70.9 nm) against nu1, calibrated on uranium optogalvanic lines, at several powers of nu1 (pp. 2464, 2467)", "isotope": "natural Kr (predominantly 84Kr)", "polarization": "not stated" }, "uncertainty": { "column": true, "level": "not stated" } } 1 inline points in the source record. pp\. 2466\-2467\: 'Measurements at different power of nu1 confirmed that this difference was due to a Stark shift of \(8\.6\+\-3\.8\) x 10^\-11 cm\-1/W/cm2', the difference being that of the measured 2 nu1 = 94 093\.00\+\-0\.04 \(at about 8e8 W/cm2\) from Trickl et al\.'s low\-intensity 94 092\.856\+\-0\.007; extrapolated to zero intensity, 2 nu1 = 94 092\.93\+\-0\.05 \(level\_5p12\_0\)\. Printed in cm^\-1 per W/cm2 \(the points, in units of 1e\-11\); the scale, 1e\-11 x c \(c = 2\.99792458e10 cm/s\), gives 2\.58\+\-1\.14 Hz/\(W/cm2\)\: brandi\_2002's reproduced 2\.6\(1\.1\)\. Positive\: the shifted resonance lies above the zero\-intensity one, a blue shift of the transition \(2 nu1\) frequency\. The x is the nu1 photon, '~212\.6 nm' \(p\. 2461\); nu1/2 = 23 523\.25 cm^\-1 \(p\. 2464\) puts it at 212\.556 nm \(vacuum\)\. The \+\-3\.8 has no stated level\. balakrishnan\_1994/level\_5p12\_0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "level_5p12_0", "material": "Kr", "table": "text", "quantity": "level_energy", "unit": "cm-1", "abscissa": "label", "use": "check", "parameters": { "configuration": "4s2.4p5.(2P*<3/2>).5p", "term": "2[1/2]", "j": "0", "isotope": "natural Kr (predominantly 84Kr)" }, "uncertainty": { "column": true, "level": "not stated" } } 1 inline points in the source record. p\. 2467\: 'an extrapolation to zero intensity of nu1 gave a value of 2 nu1 = 94 092\.93\+\-0\.05 cm\-1, in essential agreement with the value of Ref\. \[23\]' \(Trickl et al\., 86Kr, 94 092\.856\+\-0\.007\), with the remark that natural Kr is predominantly 84Kr\. Check\: a natural\-isotope extrapolation, 40 times less precise than brandi\_2002's 86Kr level \(94 092\.8673\(13\)\); 0\.067 cm^\-1 above brandi\_2002's 84Kr value and NIST's 94 092\.8626\. Level of the uncertainty not stated\. balakrishnan\_1994/herzberg\_1970\_H2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "herzberg_1970_H2", "material": "H2", "file": "H2/balakrishnan_1994__herzberg_1970_H2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "G. Herzberg, J. Mol. Spectrosc. 33, 147 (1970)" ], "parameters": { "kind": "D0", "products": "H(1s) + H(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Experiment, Herzberg \[5\], H2\: '36 118\.3', no uncertainty printed\. From the upper bound of the second dissociation limit in absorption at 77 K, which Herzberg favoured \(p\. 2460\)\. balakrishnan\_1994/herzberg\_1970\_D2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "herzberg_1970_D2", "material": "D2", "file": "D2/balakrishnan_1994__herzberg_1970_D2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "G. Herzberg, J. Mol. Spectrosc. 33, 147 (1970)" ], "parameters": { "kind": "D0", "products": "D(1s) + D(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Experiment, Herzberg \[5\], D2\: '36 748\.9±0\.4' \(the D2 limit free of overlapping lines, p\. 2460\)\. balakrishnan\_1994/stwalley\_1970\_H2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "stwalley_1970_H2", "material": "H2", "file": "H2/balakrishnan_1994__stwalley_1970_H2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "W. C. Stwalley, Chem. Phys. Lett. 6, 241 (1970)" ], "parameters": { "kind": "D0", "products": "H(1s) + H(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Experiment, Stwalley \[6\], H2\: '36 118\.6±0\.5', from new vibrational assignments near the limit and long\-range extrapolation \(pp\. 2460\-2461\)\. balakrishnan\_1994/leroy\_1975\_D2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "leroy_1975_D2", "material": "D2", "file": "D2/balakrishnan_1994__leroy_1975_D2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "R. J. LeRoy and M. G. Barwell, Can. J. Phys. 53, 1983 (1975)" ], "parameters": { "kind": "D0", "products": "D(1s) + D(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Experiment, LeRoy and Barwell \[7\], D2\: '36 748\.88±0\.3', from the first rotational term value of the ground\-state v = 21 level \(p\. 2461\)\. balakrishnan\_1994/mccormack\_1991\_H2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "mccormack_1991_H2", "material": "H2", "file": "H2/balakrishnan_1994__mccormack_1991_H2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "E. F. McCormack and E. E. Eyler, Phys. Rev. Lett. 66, 1042 (1991)" ], "parameters": { "kind": "D0", "products": "H(1s) + H(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Experiment, McCormack and Eyler \[3\], H2\: '36 118\.26±0\.20', from the onset of the second dissociation continuum at 118 377\.23\+\-0\.20 cm^\-1 \(p\. 2461; the 1992 Letter prints 118 377\.2\)\. balakrishnan\_1994/eyler\_1993\_H2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "eyler_1993_H2", "material": "H2", "file": "H2/balakrishnan_1994__eyler_1993_H2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "E. E. Eyler and N. Melikechi, Phys. Rev. A 48, R18 (1993)" ], "parameters": { "kind": "D0", "products": "H(1s) + H(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Experiment, Eyler and Melikechi \[9\], H2\: '36 118\.06±0\.04', double\-resonance spectroscopy of the same limit \(pp\. 2461, 2467\)\. balakrishnan\_1994/eyler\_1993\_D2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "eyler_1993_D2", "material": "D2", "file": "D2/balakrishnan_1994__eyler_1993_D2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "E. E. Eyler and N. Melikechi, Phys. Rev. A 48, R18 (1993)" ], "parameters": { "kind": "D0", "products": "D(1s) + D(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Experiment, Eyler and Melikechi \[9\], D2\: '36 748\.32±0\.07' \(pp\. 2461, 2467\)\. balakrishnan\_1994/wolniewicz\_1993\_H2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "wolniewicz_1993_H2", "material": "H2", "file": "H2/balakrishnan_1994__wolniewicz_1993_H2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "L. Wolniewicz, J. Chem. Phys. 99, 1851 (1993)" ], "parameters": { "kind": "D0", "products": "H(1s) + H(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Theory, Wolniewicz \[2\], H2\: '36 118\.060±0\.01', ab initio with relativistic, radiative and nonadiabatic corrections, 'estimated to have an accuracy of \+\-0\.01 cm\-1' \(p\. 2460\)\. balakrishnan\_1994/wolniewicz\_1993\_D2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "wolniewicz_1993_D2", "material": "D2", "file": "D2/balakrishnan_1994__wolniewicz_1993_D2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "L. Wolniewicz, J. Chem. Phys. 99, 1851 (1993)" ], "parameters": { "kind": "D0", "products": "D(1s) + D(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Theory, Wolniewicz \[2\], D2\: '36 748\.355±0\.01' \(p\. 2460\)\. balakrishnan\_1994/kolos\_1986\_H2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "kolos_1986_H2", "material": "H2", "file": "H2/balakrishnan_1994__kolos_1986_H2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "W. Kolos, K. Szalewicz and H. J. Monkhorst, J. Chem. Phys. 84, 3278 (1986)" ], "parameters": { "kind": "D0", "products": "H(1s) + H(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Theory, 'Kolos, Szalewicz, and Monkhorst \[2\]', H2\: '36 118\.088±0\.1' \(\[2\] reads 'L\. Wolniewicz \.\.\.; see also W\. Kolos, K\. Szalewicz, and H\. J\. Monkhorst, ibid\. 84, 3278 \(1986\)'\)\. The 1992 Letter \(balakrishnan\_1992\) prints the same calculation as 36 118\.088 with an estimated accuracy of \+\-0\.10 from Dressler and Wolniewicz \(1986\)\. balakrishnan\_1994/kolos\_1986\_D2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "kolos_1986_D2", "material": "D2", "file": "D2/balakrishnan_1994__kolos_1986_D2.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "W. Kolos, K. Szalewicz and H. J. Monkhorst, J. Chem. Phys. 84, 3278 (1986)" ], "parameters": { "kind": "D0", "products": "D(1s) + D(1s)" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Theory, 'Kolos, Szalewicz, and Monkhorst \[2\]', D2\: '36 748\.347±0\.1'\. balakrishnan\_1994/wolniewicz\_1991\_H2\+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "wolniewicz_1991_H2+", "material": "H2+", "file": "H2+/balakrishnan_1994__wolniewicz_1991_H2+.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "L. Wolniewicz and T. Orlikowski, Mol. Phys. 74, 103 (1991)" ], "parameters": { "kind": "D0", "products": "H(1s) + H+" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Theory, Wolniewicz and Orlikowski \[31\], H2\+\: '21 379\.348', no uncertainty printed \(p\. 2468\: the ions' binding energies calculated 'to better than \+\-0\.01 cm\-1'\)\. balakrishnan\_1994/wolniewicz\_1991\_D2\+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "wolniewicz_1991_D2+", "material": "D2+", "file": "D2+/balakrishnan_1994__wolniewicz_1991_D2+.csv", "table": "tbl_26f7348398d0", "quantity": "dissociation_energy", "unit": "cm-1", "abscissa": "label", "use": "reproduced", "reproduced_from": [ "L. Wolniewicz and T. Orlikowski, Mol. Phys. 74, 103 (1991)" ], "parameters": { "kind": "D0", "products": "D(1s) + D+" }, "uncertainty": { "column": true, "level": "not stated" } } Table III \(p\. 2468\), Theory, Wolniewicz and Orlikowski \[31\], D2\+\: '21 711\.580', no uncertainty printed\. 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 ` for the checks and decisions.