jammu_1966#
K. S. Jammu, G. E. St. John and H. L. Welsh, “Pressure broadening of the rotational Raman lines of some simple gases”, Can. J. Phys. 44, 797 (1966)
Source record · Catalogue · Review register
DOI: 10.1139/p66-068
Source kind: measurement
Recorded technique: Spontaneous pure rotational Raman spectra excited by the Hg 2537 A line (Rayleigh line absorbed by mercury vapour in the spectrograph, Rasetti’s method), in a fused-quartz high-pressure tube (water-cooled at about 15 C, multiple-reflection mirrors) at 7-43 atm, photographed with a grating spectrograph of 11.2 cm-1/mm (practical resolution 0.6 cm-1, spectral slit 0.3 cm-1); photographic photometry. Line widths corrected for overlap of the four neighbouring Lorentzian lines (procedure (a), Eqs. (2)-(5); procedure (b), Eq. (6), for CO2); the corrected full width X plotted against pressure, X = 2 Delta nu_1/2, whose slope gives Delta nu_1/2/p (p. 10). Foreign-gas broadening: 3 atm of O2 or N2 with 15-42 atm of Ar or He added.
Materials in structured entries: CO, CO2, N2, O2
Dataset quantities: raman_linewidth
Contents: 22 datasets; 0 formulas.
Curation notes#
Identity checked against the first page (Can. J. Phys. 44, 797-814 (1966); the library copy is an NRC Research Press download). Page numbers are pdf pages (1-18). Materials: 16O2, 14N2, 12C16O2, 12C16O as the natural gases; no isotopologue is resolved.
WIDTH CONVENTION (the key hazard). Footnote, p. 2: ‘*Throughout this paper Delta nu_1/2 means one half of the width of the line at the point where the intensity is one half of the peak intensity.’ p. 10: ‘The slopes of the straight lines in Fig. 6 allow us to define a broadening coefficient, Delta nu_1/2/p, with X = 2 Delta nu_1/2’ (X the corrected full width). Every coefficient here is therefore a HALF width at half maximum (HWHM) per atm, in 10^-3 cm-1/atm. Pressure in atm, not density; the temperature is ‘room temperature’ (abstract), the tube being water-cooled at about 15 C (p. 4): the gas temperature is not stated. The widths extrapolate to X(p = 0) = 0.5 cm-1 (the apparatus function), which the slope excludes (p. 10). The widths assume no line mixing (‘statistically independent lines’, p. 5).
TABLES. Only O2 is tabulated line by line (Table I, K = 3-19, K the rotational quantum number of the initial level, N in modern notation; two exposure times, ‘the average difference is only 2 %’, p. 10; the K = 1 line, affected by the spin satellites and the Rayleigh wing, is only in Figs. 5-7). N2 (J = 2-16; no reliable J = 0, 1), CO (7-31 atm) and CO2 (5 and 9 atm, J >= 4; J = 4, 6 corrected for the Rayleigh wing) self-broadening, and the Ar and He broadening of O2 and N2, are in Figs. 9-13 only (not digitised); Table II gives, for each pair, only ‘the extreme values observed’ over the lines (note *), recorded as rows ‘largest’ (lowest J) and ‘smallest’ (highest J), the J of each not stated. For O2 the extremes are the mean of Table I’s K = 3 (46.5) and K = 19 (28.35 -> 28.4) values. No uncertainty is stated for any coefficient.
OTHER VALUES. Stoicheff (1950, Ph.D. thesis, Toronto), N2: ‘Delta nu_1/2/p = 0.043 cm-1/atm, as the average for several lines near the maximum of the rotational spectrum’ (p. 2; dataset text_stoicheff_N2). Van Kranendonk’s (1963) theory, revised by Gray (1965), is 18-30 % above the N2 data (Fig. 9, p. 17); not tabulated. Mikhailov ‘obtained two values ... for nitrogen, 47.5e-3 cm-1/atm up to 25 atm and 26.5e-3 for the higher pressures’ (p. 17): see mikhailov_1959, whose Table I does not give these slopes directly. The 1964 Opt. Spectrosc. N2 values of Table II are ‘some 15 % lower’ than these (p. 16).
herring_1986 Table II prints this paper’s N2 values (Ref. 3) as FWHM in MHz/amagat, S(2)-S(16) 3370 -> 2080, i.e. read from Fig. 9 and converted (x 2 x 29979 MHz / 0.926 amagat per atm at about 295 K: 3370 <-> 0.0521 cm-1/atm, 2080 <-> 0.0321; Table II here: 52.4 -> 31.3).
solprop: the ‘2.6e9 Hz/amagat’ N2 figure solprop mentions equals 2 x 0.043 cm-1/atm x 29.98 GHz = 2.58e9 Hz per atm (Stoicheff’s average HWHM made a FWHM, per atm not per amagat), or this paper’s mid-J N2 values (HWHM about 0.043-0.045 cm-1/atm near J = 6-8 in Fig. 9) likewise converted.
Recorded bibliographic identity status: VALIDATED_WITH_WARNINGS. This concerns identification of the source; it does not establish the scientific correctness of its contents.
Datasets#
jammu_1966/table1_20min#
{
"id": "table1_20min",
"material": "O2",
"file": "O2/jammu_1966__table1_20min.csv",
"table": "tbl_f9fde98532d6",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "primary",
"parameters": {
"transition": "S(K), K the initial level (N), per row",
"width": "hwhm",
"perturber": "self"
}
}
Table I (p. 11): HWHM self-broadening coefficient Delta nu_1/2/p of the O2 rotational Raman lines (Stokes and anti-Stokes averaged, Fig. 6), rows S(K) with K the initial rotational level (N), 20-minute exposures; 7-43 atm, room temperature. No uncertainty stated.
jammu_1966/table1_40min#
{
"id": "table1_40min",
"material": "O2",
"file": "O2/jammu_1966__table1_40min.csv",
"table": "tbl_f9fde98532d6",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "primary",
"parameters": {
"transition": "S(K), K the initial level (N), per row",
"width": "hwhm",
"perturber": "self"
}
}
Table I (p. 11): as table1_20min, from the 40-minute exposures (the two sets differ by 2 % on average, p. 10).
jammu_1966/table2_O2#
{
"id": "table2_O2",
"material": "O2",
"file": "O2/jammu_1966__table2_O2.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "check",
"parameters": {
"transition": "S(J): the largest and smallest over the lines measured",
"width": "hwhm",
"perturber": "self"
}
}
Table II (p. 17), ‘This investigation’ (7-42 atm): the O2-O2 HWHM broadening coefficients vary with J (Table I, Fig. 7); the table prints only ‘the extreme values observed’ (note *): rows largest (low J) and smallest (high J), their J not stated.
jammu_1966/table2_N2#
{
"id": "table2_N2",
"material": "N2",
"file": "N2/jammu_1966__table2_N2.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "check",
"parameters": {
"transition": "S(J): the largest and smallest over the lines measured",
"width": "hwhm",
"perturber": "self"
}
}
Table II (p. 17), ‘This investigation’ (7-42 atm): the N2-N2 HWHM broadening coefficients vary with J (Fig. 9); the table prints only ‘the extreme values observed’ (note *): rows largest (low J) and smallest (high J), their J not stated.
jammu_1966/table2_CO2#
{
"id": "table2_CO2",
"material": "CO2",
"file": "CO2/jammu_1966__table2_CO2.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "check",
"parameters": {
"transition": "S(J): the largest and smallest over the lines measured",
"width": "hwhm",
"perturber": "self"
}
}
Table II (p. 17), ‘This investigation’ (5 and 9 atm): the CO2-CO2 HWHM broadening coefficients vary with J (Fig. 11); the table prints only ‘the extreme values observed’ (note *): rows largest (low J) and smallest (high J), their J not stated.
jammu_1966/table2_CO#
{
"id": "table2_CO",
"material": "CO",
"file": "CO/jammu_1966__table2_CO.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "check",
"parameters": {
"transition": "S(J): the largest and smallest over the lines measured",
"width": "hwhm",
"perturber": "self"
}
}
Table II (p. 17), ‘This investigation’ (7-31 atm): the CO-CO HWHM broadening coefficients vary with J (Fig. 10); the table prints only ‘the extreme values observed’ (note *): rows largest (low J) and smallest (high J), their J not stated.
jammu_1966/table2_O2_Ar#
{
"id": "table2_O2_Ar",
"material": "O2",
"file": "O2/jammu_1966__table2_O2_Ar.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "check",
"parameters": {
"transition": "S(J): the largest and smallest over the lines measured",
"width": "hwhm",
"perturber": "Ar"
}
}
Table II (p. 17), ‘This investigation’ (7-42 atm): the O2-Ar HWHM broadening coefficients vary with J (Fig. 12); the table prints only ‘the extreme values observed’ (note *): rows largest (low J) and smallest (high J), their J not stated. Foreign gas: 3 atm of the active gas with 15-42 atm (O2) or 15-33 atm (N2) of the perturber; the coefficient is per atm of the foreign gas (the self part at the 3 atm being taken from the self-broadening data, p. 15).
jammu_1966/table2_N2_Ar#
{
"id": "table2_N2_Ar",
"material": "N2",
"file": "N2/jammu_1966__table2_N2_Ar.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "check",
"parameters": {
"transition": "S(J): the largest and smallest over the lines measured",
"width": "hwhm",
"perturber": "Ar"
}
}
Table II (p. 17), ‘This investigation’ (7-42 atm): the N2-Ar HWHM broadening coefficients vary with J (Fig. 12); the table prints only ‘the extreme values observed’ (note *): rows largest (low J) and smallest (high J), their J not stated. Foreign gas: 3 atm of the active gas with 15-42 atm (O2) or 15-33 atm (N2) of the perturber; the coefficient is per atm of the foreign gas (the self part at the 3 atm being taken from the self-broadening data, p. 15).
jammu_1966/table2_O2_He#
{
"id": "table2_O2_He",
"material": "O2",
"file": "O2/jammu_1966__table2_O2_He.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "check",
"parameters": {
"transition": "S(J): the largest and smallest over the lines measured",
"width": "hwhm",
"perturber": "He"
}
}
Table II (p. 17), ‘This investigation’ (7-42 atm): the O2-He HWHM broadening coefficients vary with J (Fig. 13); the table prints only ‘the extreme values observed’ (note *): rows largest (low J) and smallest (high J), their J not stated. Foreign gas: 3 atm of the active gas with 15-42 atm (O2) or 15-33 atm (N2) of the perturber; the coefficient is per atm of the foreign gas (the self part at the 3 atm being taken from the self-broadening data, p. 15).
jammu_1966/table2_N2_He#
{
"id": "table2_N2_He",
"material": "N2",
"file": "N2/jammu_1966__table2_N2_He.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "check",
"parameters": {
"transition": "S(J): the largest and smallest over the lines measured",
"width": "hwhm",
"perturber": "He"
}
}
Table II (p. 17), ‘This investigation’ (7-42 atm): the N2-He HWHM broadening coefficients vary with J (Fig. 13); the table prints only ‘the extreme values observed’ (note *): rows largest (low J) and smallest (high J), their J not stated. Foreign gas: 3 atm of the active gas with 15-42 atm (O2) or 15-33 atm (N2) of the perturber; the coefficient is per atm of the foreign gas (the self part at the 3 atm being taken from the self-broadening data, p. 15).
jammu_1966/table2_mikhailov_O2#
{
"id": "table2_mikhailov_O2",
"material": "O2",
"file": "O2/jammu_1966__table2_mikhailov_O2.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"mikhailov_1959",
"G. V. Mikhailov, Zh. Eksperim. i Teor. Fiz. 37, 1570 (1960); Soviet Phys. JETP 10, 1114"
],
"parameters": {
"transition": "rotational lines, no J dependence",
"width": "hwhm",
"perturber": "self"
}
}
Table II (p. 17), ‘Mikhailov (1959, 1960) (7-125 atm)’, O2-O2, one value (no J dependence found by Mikhailov). mikhailov_1959 is about N2 only: the O2 value is presumably from the 1960 paper (not in the library).
jammu_1966/table2_mikhailov_N2#
{
"id": "table2_mikhailov_N2",
"material": "N2",
"file": "N2/jammu_1966__table2_mikhailov_N2.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"mikhailov_1959",
"G. V. Mikhailov, Zh. Eksperim. i Teor. Fiz. 37, 1570 (1960); Soviet Phys. JETP 10, 1114"
],
"parameters": {
"transition": "rotational lines, average over J",
"width": "hwhm",
"perturber": "self"
}
}
Table II (p. 17), ‘Mikhailov (1959, 1960)’, N2-N2: ‘47.5 x 10^-3 cm-1/atm up to 25 atm and 26.5 x 10^-3 cm-1/atm for the higher pressures’ (p. 17). mikhailov_1959’s Table I (widths against pressure, averaged over J = 0-15) does not give these slopes directly (see its record). Recorded as HWHM as Jammu et al. tabulate it.
jammu_1966/table2_lazarev_O2#
{
"id": "table2_lazarev_O2",
"material": "O2",
"file": "O2/jammu_1966__table2_lazarev_O2.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"Yu. A. Lazarev, Optika i Spektroskopiya 13, 655 (1962); Opt. Spectry. 13, 373"
],
"parameters": {
"transition": "S(J) of the most populated levels",
"width": "hwhm",
"perturber": "self"
}
}
Table II (p. 17), ‘Lazarev (1962) (1-10 atm)’, O2-O2: ‘According to the author, these values refer to the transitions between the most highly populated levels’ (note dagger). As Jammu et al. tabulate it (HWHM per atm).
jammu_1966/table2_lazarev_N2#
{
"id": "table2_lazarev_N2",
"material": "N2",
"file": "N2/jammu_1966__table2_lazarev_N2.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"Yu. A. Lazarev, Optika i Spektroskopiya 13, 655 (1962); Opt. Spectry. 13, 373"
],
"parameters": {
"transition": "S(J) of the most populated levels",
"width": "hwhm",
"perturber": "self"
}
}
Table II (p. 17), ‘Lazarev (1962) (1-10 atm)’, N2-N2: ‘According to the author, these values refer to the transitions between the most highly populated levels’ (note dagger). As Jammu et al. tabulate it (HWHM per atm).
jammu_1966/table2_lazarev_CO2#
{
"id": "table2_lazarev_CO2",
"material": "CO2",
"file": "CO2/jammu_1966__table2_lazarev_CO2.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"Yu. A. Lazarev, Optika i Spektroskopiya 13, 655 (1962); Opt. Spectry. 13, 373"
],
"parameters": {
"transition": "S(J) of the most populated levels",
"width": "hwhm",
"perturber": "self"
}
}
Table II (p. 17), ‘Lazarev (1962) (1-10 atm)’, CO2-CO2: ‘According to the author, these values refer to the transitions between the most highly populated levels’ (note dagger). As Jammu et al. tabulate it (HWHM per atm).
jammu_1966/table2_lazarev_CO#
{
"id": "table2_lazarev_CO",
"material": "CO",
"file": "CO/jammu_1966__table2_lazarev_CO.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"Yu. A. Lazarev, Optika i Spektroskopiya 13, 655 (1962); Opt. Spectry. 13, 373"
],
"parameters": {
"transition": "S(J) of the most populated levels",
"width": "hwhm",
"perturber": "self"
}
}
Table II (p. 17), ‘Lazarev (1962) (1-10 atm)’, CO-CO: ‘According to the author, these values refer to the transitions between the most highly populated levels’ (note dagger). As Jammu et al. tabulate it (HWHM per atm).
jammu_1966/table2_lazarev_O2_Ar#
{
"id": "table2_lazarev_O2_Ar",
"material": "O2",
"file": "O2/jammu_1966__table2_lazarev_O2_Ar.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"Yu. A. Lazarev, Optika i Spektroskopiya 13, 655 (1962); Opt. Spectry. 13, 373"
],
"parameters": {
"transition": "S(J) of the most populated levels",
"width": "hwhm",
"perturber": "Ar"
}
}
Table II (p. 17), ‘Lazarev (1962) (1-10 atm)’, O2-Ar: ‘According to the author, these values refer to the transitions between the most highly populated levels’ (note dagger). As Jammu et al. tabulate it (HWHM per atm).
jammu_1966/table2_lazarev_N2_Ar#
{
"id": "table2_lazarev_N2_Ar",
"material": "N2",
"file": "N2/jammu_1966__table2_lazarev_N2_Ar.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"Yu. A. Lazarev, Optika i Spektroskopiya 13, 655 (1962); Opt. Spectry. 13, 373"
],
"parameters": {
"transition": "S(J) of the most populated levels",
"width": "hwhm",
"perturber": "Ar"
}
}
Table II (p. 17), ‘Lazarev (1962) (1-10 atm)’, N2-Ar: ‘According to the author, these values refer to the transitions between the most highly populated levels’ (note dagger). As Jammu et al. tabulate it (HWHM per atm).
jammu_1966/table2_lazarev_O2_He#
{
"id": "table2_lazarev_O2_He",
"material": "O2",
"file": "O2/jammu_1966__table2_lazarev_O2_He.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"Yu. A. Lazarev, Optika i Spektroskopiya 13, 655 (1962); Opt. Spectry. 13, 373"
],
"parameters": {
"transition": "S(J) of the most populated levels",
"width": "hwhm",
"perturber": "He"
}
}
Table II (p. 17), ‘Lazarev (1962) (1-10 atm)’, O2-He: ‘According to the author, these values refer to the transitions between the most highly populated levels’ (note dagger). As Jammu et al. tabulate it (HWHM per atm).
jammu_1966/table2_pinter_N2#
{
"id": "table2_pinter_N2",
"material": "N2",
"file": "N2/jammu_1966__table2_pinter_N2.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"F. Pinter, Optika i Spektroskopiya 17, 792 (1964); Opt. Spectry. 17, 428"
],
"parameters": {
"transition": "S(J), per row",
"width": "hwhm",
"perturber": "self"
}
}
Table II (p. 17), ‘Pinter (1964) (1-10 atm)’, N2-N2 for the J = 4, 8 and 12 lines (note double dagger); ‘some 15 % lower’ than this paper’s (p. 16).
jammu_1966/table2_pinter_CO2#
{
"id": "table2_pinter_CO2",
"material": "CO2",
"file": "CO2/jammu_1966__table2_pinter_CO2.csv",
"table": "tbl_9e05c97e2664",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"scale": 0.001,
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"F. Pinter, Optika i Spektroskopiya 17, 792 (1964); Opt. Spectry. 17, 428"
],
"parameters": {
"transition": "S(J), per row",
"width": "hwhm",
"perturber": "self"
}
}
Table II (p. 17), ‘Pinter (1964)’, CO2-CO2 for the J = 22, 26 and 32 lines (note section sign); ‘in good agreement with our data’ (p. 16).
jammu_1966/text_stoicheff_N2#
{
"id": "text_stoicheff_N2",
"material": "N2",
"table": "text",
"quantity": "raman_linewidth",
"unit": "cm-1/atm",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"B. P. Stoicheff, Ph.D. Thesis, University of Toronto (1950)"
],
"parameters": {
"transition": "S(J), average of several lines near the intensity maximum",
"width": "hwhm",
"perturber": "self"
}
}
1 inline points in the source record.
p. 2: Stoicheff ‘showed ... that up to 25 atm the broadening of the rotational lines of nitrogen is linear with pressure; he obtained a broadening coefficient, Delta nu_1/2/p = 0.043 cm-1/atm, as the average for several lines near the maximum of the rotational spectrum.’ HWHM per the paper’s footnote.
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.