holzer_2021 =========== J\. I\. Hölzer, C\. Meißner and T\. Seeger, "Improvement of the coherent model function for S\-branch Raman linewidth determination in oxygen", Appl\. Opt\. 60, C76 \(2021\) `Source record `__ · :doc:`Catalogue ` · :doc:`Review register ` DOI: `10\.1364/AO\.419648 `__ **Source kind:** measurement **Recorded technique:** Picosecond time\-resolved dual\-broadband pure rotational CARS \(p\. 2\)\: a frequency\-doubled Nd\:YAG \(532 nm, 100 ps\) as the delayed narrowband probe and a DCM broadband dye laser \(630 nm, 469 cm\-1 FWHM\) as pump and Stokes, in BOXCARS geometry in an electrically heated furnace \(295\-1900 K\) at about 1 bar; the coherence decay of each S\(N''\) line fitted with Eq\. \(2\), three spin\-rotation \(S\-S\) beats times exp\(\-t/tau\) convolved with the Gaussian probe \(about 150 ps\), each point weighted by the inverse of its intensity \(the 'weighted model'\)\. **Materials in structured entries:** O2 **Dataset quantities:** raman\_linewidth **Contents:** 15 datasets; 0 formulas. Curation notes -------------- Identity checked against the first page \(version of record, Appl\. Opt\. 60\(15\), C76\-C83, 2021\)\. Page numbers are pdf pages 1\-8\. Material\: 16O2 \(X 3Sigma\_g\-\), S\-branch lines labelled by N'' of the lower level; the spin triplets are resolved in time as beats, the width being common to the triplet\. At 1400 K and above the v = 1 hot band \(about 5 % of the intensity\) overlaps the high\-N'' lines and is not separated \(p\. 4\)\. No isotopologue is measured\. WIDTH CONVENTION\. FULL widths\: Eq\. \(1\), p\. 1, 'Gamma\_N'' is the full width at half\-maximum S\-branch Raman linewidth', Gamma\_N'' = \(2 pi c tau\_coll,N''\)^\-1, tau the decay constant of the CARS INTENSITY \(Eq\. \(2\)\: I ~ \|rho\|^2 exp\(\-t/tau\)\); table heads 'Gamma\_N''\(FWHM\)/10^\-3 cm\-1 atm\-1'\. Per atm\: the measurements are at about 1 bar \(Fig\. 1 caption, p\. 2\) and the widths are divided by the pressure \(the Fig\. 6 and 9 captions quote widths 'without accounting for the actual pressure during the experiment'\); the exact pressure of each run is not stated\. Uncertainties\: 'the standard deviation of the fit' \(table notes\), a statistical 1 sigma only; the simulations \(p\. 3\) give the weighted model a mean bias of \-0\.1 % and a 95 % interval of 23 % for single unoptimised fits\. TABLE 2 is O2 in AIR, not O2\-N2\: 'Experimental S\-Branch Raman Linewidths of Oxygen in Air' \(caption\); the O2\-N2 widths by Eq\. \(3\), Gamma = x\_O2 Gamma\(O2\-O2\) \+ x\_N2 Gamma\(O2\-N2\), are left for 'a future work' \(p\. 6\)\. Recorded with perturber = "air" \(the paper's air\: its composition is not stated\)\. The weighted model changes the 295 K widths by 'about a factor of two' from the authors' earlier unaltered\-model values \(Hölzer et al\., J\. Raman Spectrosc\. 50, 1260 \(2019\), Ref\. 19; p\. 4\); those earlier values, and the literature in Figs\. 7 and 10 \(Bérard, Courtney, Jammu, Looney, Miller, Millot, Ouazzany\), are in figures only\. The text quotes single fitted widths \(Figs\. 6 and 9, not per atm\)\: N'' = 25 at 295 K, 0\.030 \(unaltered\) and 0\.049 cm\-1 \(weighted\); N'' = 21 at 1900 K, 0\.042 and 0\.025; in air, N'' = 21 at 295 K, 0\.035 and 0\.041; N'' = 47 at 1650 K, 0\.031 and 0\.014 \(not extracted\)\. B0 = 1\.438 cm\-1, B1 = 1\.422 cm\-1 are quoted from Ref\. 40 \(p\. 4; not extracted\)\. Thermometry \(p\. 5\)\: with these S\-branch widths a pure\-O2 spectrum at 870 K fits to 874 K; with Millot et al\.'s MEG Q\-branch widths \(millot\_1992\) to 895 K\. solprop\: its O2 rotational width, 2836257257\.78 Hz/amagat FWHM, is Table 1's N'' = 7 at 295 K, 87\.6 \+\- 3\.1 x 1e\-3 cm\-1/atm FWHM, converted with 1 atm = 0\.92593 amagat at 295 K \(ideal gas\)\: 87\.6e\-3 x 29\.9792458e9 / 0\.92593 = 2\.8363e9\. solprop applies it to all N; Table 1 runs from 98\.5 \(N'' = 3\) to 46\.4 \(N'' = 27\) at 295 K\. **Recorded bibliographic identity status:** VALIDATED. This concerns identification of the source; it does not establish the scientific correctness of its contents. Datasets -------- holzer\_2021/table1\_self\_295K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table1_self_295K", "material": "O2", "file": "O2/holzer_2021__table1_self_295K.csv", "table": "tbl_2ed5b19b32b8", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "self", "temperature_k": 295 } } Table 1 \(p\. 5\), 295 K\: S\-branch self\-broadened FWHM of pure O2, 1e\-3 cm\-1/atm \(measured near 1 bar\), weighted model; \+\- the fit's standard deviation\. solprop's O2 rotational width is the S\(7\) value\. holzer\_2021/table1\_self\_500K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table1_self_500K", "material": "O2", "file": "O2/holzer_2021__table1_self_500K.csv", "table": "tbl_2ed5b19b32b8", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "self", "temperature_k": 500 } } Table 1 \(p\. 5\), 500 K\: S\-branch self\-broadened FWHM of pure O2, 1e\-3 cm\-1/atm \(measured near 1 bar\), weighted model; \+\- the fit's standard deviation\. holzer\_2021/table1\_self\_870K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table1_self_870K", "material": "O2", "file": "O2/holzer_2021__table1_self_870K.csv", "table": "tbl_2ed5b19b32b8", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "self", "temperature_k": 870 } } Table 1 \(p\. 5\), 870 K\: S\-branch self\-broadened FWHM of pure O2, 1e\-3 cm\-1/atm \(measured near 1 bar\), weighted model; \+\- the fit's standard deviation\. holzer\_2021/table1\_self\_1000K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table1_self_1000K", "material": "O2", "file": "O2/holzer_2021__table1_self_1000K.csv", "table": "tbl_2ed5b19b32b8", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "self", "temperature_k": 1000 } } Table 1 \(p\. 5\), 1000 K\: S\-branch self\-broadened FWHM of pure O2, 1e\-3 cm\-1/atm \(measured near 1 bar\), weighted model; \+\- the fit's standard deviation\. holzer\_2021/table1\_self\_1200K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table1_self_1200K", "material": "O2", "file": "O2/holzer_2021__table1_self_1200K.csv", "table": "tbl_2ed5b19b32b8", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "self", "temperature_k": 1200 } } Table 1 \(p\. 5\), 1200 K\: S\-branch self\-broadened FWHM of pure O2, 1e\-3 cm\-1/atm \(measured near 1 bar\), weighted model; \+\- the fit's standard deviation\. holzer\_2021/table1\_self\_1400K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table1_self_1400K", "material": "O2", "file": "O2/holzer_2021__table1_self_1400K.csv", "table": "tbl_2ed5b19b32b8", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "self", "temperature_k": 1400 } } Table 1 \(p\. 5\), 1400 K\: S\-branch self\-broadened FWHM of pure O2, 1e\-3 cm\-1/atm \(measured near 1 bar\), weighted model; \+\- the fit's standard deviation\. holzer\_2021/table1\_self\_1650K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table1_self_1650K", "material": "O2", "file": "O2/holzer_2021__table1_self_1650K.csv", "table": "tbl_2ed5b19b32b8", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "self", "temperature_k": 1650 } } Table 1 \(p\. 5\), 1650 K\: S\-branch self\-broadened FWHM of pure O2, 1e\-3 cm\-1/atm \(measured near 1 bar\), weighted model; \+\- the fit's standard deviation\. holzer\_2021/table1\_self\_1750K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table1_self_1750K", "material": "O2", "file": "O2/holzer_2021__table1_self_1750K.csv", "table": "tbl_2ed5b19b32b8", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "self", "temperature_k": 1750 } } Table 1 \(p\. 5\), 1750 K\: S\-branch self\-broadened FWHM of pure O2, 1e\-3 cm\-1/atm \(measured near 1 bar\), weighted model; \+\- the fit's standard deviation\. holzer\_2021/table1\_self\_1900K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table1_self_1900K", "material": "O2", "file": "O2/holzer_2021__table1_self_1900K.csv", "table": "tbl_2ed5b19b32b8", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "self", "temperature_k": 1900 } } Table 1 \(p\. 5\), 1900 K\: S\-branch self\-broadened FWHM of pure O2, 1e\-3 cm\-1/atm \(measured near 1 bar\), weighted model; \+\- the fit's standard deviation\. holzer\_2021/table2\_air\_295K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table2_air_295K", "material": "O2", "file": "O2/holzer_2021__table2_air_295K.csv", "table": "tbl_2e8c929f073a", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "air", "temperature_k": 295 } } Table 2 \(p\. 7\), 295 K\: S\-branch FWHM of O2 in air \(broadened by the air mixture, predominantly N2\), 1e\-3 cm\-1/atm, weighted model; \+\- the fit's standard deviation\. Not the O2\-N2 coefficient\. holzer\_2021/table2\_air\_500K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table2_air_500K", "material": "O2", "file": "O2/holzer_2021__table2_air_500K.csv", "table": "tbl_2e8c929f073a", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "air", "temperature_k": 500 } } Table 2 \(p\. 7\), 500 K\: S\-branch FWHM of O2 in air \(broadened by the air mixture, predominantly N2\), 1e\-3 cm\-1/atm, weighted model; \+\- the fit's standard deviation\. Not the O2\-N2 coefficient\. holzer\_2021/table2\_air\_870K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table2_air_870K", "material": "O2", "file": "O2/holzer_2021__table2_air_870K.csv", "table": "tbl_2e8c929f073a", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "air", "temperature_k": 870 } } Table 2 \(p\. 7\), 870 K\: S\-branch FWHM of O2 in air \(broadened by the air mixture, predominantly N2\), 1e\-3 cm\-1/atm, weighted model; \+\- the fit's standard deviation\. Not the O2\-N2 coefficient\. holzer\_2021/table2\_air\_1400K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table2_air_1400K", "material": "O2", "file": "O2/holzer_2021__table2_air_1400K.csv", "table": "tbl_2e8c929f073a", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "air", "temperature_k": 1400 } } Table 2 \(p\. 7\), 1400 K\: S\-branch FWHM of O2 in air \(broadened by the air mixture, predominantly N2\), 1e\-3 cm\-1/atm, weighted model; \+\- the fit's standard deviation\. Not the O2\-N2 coefficient\. holzer\_2021/table2\_air\_1650K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table2_air_1650K", "material": "O2", "file": "O2/holzer_2021__table2_air_1650K.csv", "table": "tbl_2e8c929f073a", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "air", "temperature_k": 1650 } } Table 2 \(p\. 7\), 1650 K\: S\-branch FWHM of O2 in air \(broadened by the air mixture, predominantly N2\), 1e\-3 cm\-1/atm, weighted model; \+\- the fit's standard deviation\. Not the O2\-N2 coefficient\. holzer\_2021/table2\_air\_1900K ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "table2_air_1900K", "material": "O2", "file": "O2/holzer_2021__table2_air_1900K.csv", "table": "tbl_2e8c929f073a", "quantity": "raman_linewidth", "unit": "cm-1/atm", "scale": 0.001, "abscissa": "label", "use": "primary", "uncertainty": { "column": true, "level": "1 sigma" }, "parameters": { "transition": "S(N''), N'' the lower level, per row", "width": "fwhm", "perturber": "air", "temperature_k": 1900 } } Table 2 \(p\. 7\), 1900 K\: S\-branch FWHM of O2 in air \(broadened by the air mixture, predominantly N2\), 1e\-3 cm\-1/atm, weighted model; \+\- the fit's standard deviation\. Not the O2\-N2 coefficient\. 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.