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 `__ · :doc:`Catalogue ` · :doc:`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 ~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 :doc:`review register ` for the checks and decisions.