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 · Catalogue · 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#
{
"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#
{
"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#
{
"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#
{
"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#
{
"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#
{
"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#
{
"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#
{
"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#
{
"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#
{
"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#
{
"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#
{
"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#
{
"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#
{
"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#
{
"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 review register for the checks and decisions.