DOI: 10.1139/p52-008. ROTATIONAL WINGS OF RAMAN BANDS AND FREE ROTATION IN LIQUID OXYGEN, NITROGEN, AND METHANE

ROTATIONAL WINGS OF RAMAN BANDS AND FREE ROTATION IN LIQUID OXYGEN, NITROGEN, AND METHANE

10.1139/p52-008

Crossref journal-article

Canadian Science Publishing

Canadian Journal of Physics (155)

Abstract

Rotation-vibrational Raman bands have been observed in liquid oxygen, nitrogen, and methane, and in solid methane. In every case the Q branches associated with isotropic Raman scattering are sharp lines; but the Q branches and rotational wings associated with anisotropic scattering form broad continuous bands, with extent and intensity distribution consistent with free molecular rotation. The lack of discrete structure in the broad bands is attributed to a removal of the m degeneracy of the rotational energy levels in the intermolecular force fields. Removal of the m degeneracy broadens those transitions for which the transition probability depends on the anisotropic part of the rate of change of the polarizability, but not those for which J and m are unchanged and for which the transition probability depends only on the isotropic part. The Raman spectrum of liquid oxygen yields no evidence for O4 aggregates. The Raman spectrum of liquid methane displays all fundamental vibrations of the molecule and two overtones, with Raman shifts (in cm.−1): 1300, band (ν4); 1535, band (ν2); 2570, line, and 2600, band (2ν4); 2906, line (ν1); 3020, band (ν3); 3053, line (2ν2).

Bibliography

Crawford, M. F., Welsh, H. L., & Harrold, J. H. (1952). ROTATIONAL WINGS OF RAMAN BANDS AND FREE ROTATION IN LIQUID OXYGEN, NITROGEN, AND METHANE. Canadian Journal of Physics, 30(2), 81â98.

Authors 3

M. F. Crawford (first)
H. L. Welsh (additional)
J. H. Harrold (additional)

References 16 Referenced 81

BHAG.IVANTAM, S. and R.40, A. V. 1932.
Phys. Rcv. 47: $121. 1935. (10.1086/124573)
CABAXSES,J. and Roussrr,A. Compt. rend. 206: 185. 1938.
{'key': 'p_5/p_5_1', 'first-page': '583', 'volume': '31', 'author': 'ICIENSOX R. G.', 'journal-title': 'Rev.'} / Rev. by ICIENSOX R. G.
{'key': 'p_6/p_6_1', 'first-page': '1356', 'volume': '17', 'author': 'HOIDES K. B.', 'year': '1949', 'journal-title': 'Chcm. Phys.'} / Chcm. Phys. by HOIDES K. B. (1949)
{'key': 'p_7/p_7_1', 'first-page': '2027', 'volume': '46', 'author': 'LI YIS', 'journal-title': 'J. Am. Chern. Soc.'} / J. Am. Chern. Soc. by LI YIS
r\lIcLsx.ix,J . C. ancl NICLEOD,J . H. 1924.
{'key': 'p_14/p_14_1', 'first-page': '430', 'volume': '36', 'author': 'ICLISG L.', 'journal-title': 'Rev.'} / Rev. by ICLISG L.
PLICLEIC. G. and ?'ICLLER.E. 1938.
Z. Phvsilc. 81: 200. 1933.
{'key': 'p_17/p_17_1', 'first-page': '116', 'volume': '18', 'author': "D' H.", 'year': '1950', 'journal-title': 'Chem. Phys.'} / Chem. Phys. by D' H. (1950)
{'key': 'p_18/p_18_1', 'first-page': '123', 'volume': '14', 'author': 'SAIIA B', 'year': '1940', 'journal-title': 'India 11J . Phys.'} / India 11J . Phys. by SAIIA B (1940)
10.1063/1.1747522 / J. Chcm. Phys. by 'THOMAS J . (1950)
TRUMPY,B. Z. Physilc. 81: 282. 1933. (10.1007/BF01336987)
I!). VOLICRIXGITR, H., FRI.:YM.ISS,NI., and FREYMASN,R. Compt. rend. 208: 1005. 1939.
{'key': 'p_22/p_22_1', 'first-page': '87', 'volume': '16', 'author': 'VELSH H. L.', 'year': '1948', 'journal-title': 'Chem. Phys.'} / Chem. Phys. by VELSH H. L. (1948)

Dates

Type	When
Created	14 years, 4 months ago (April 23, 2011, 3:36 p.m.)
Deposited	1 month, 3 weeks ago (July 2, 2025, 10:29 a.m.)
Indexed	1 month, 3 weeks ago (July 3, 2025, 12:08 a.m.)
Issued	73 years, 5 months ago (March 1, 1952)
Published	73 years, 5 months ago (March 1, 1952)
Published Print	73 years, 5 months ago (March 1, 1952)

Funders 0

None

BibTeX

@article{Crawford_1952, title={ROTATIONAL WINGS OF RAMAN BANDS AND FREE ROTATION IN LIQUID OXYGEN, NITROGEN, AND METHANE}, volume={30}, ISSN={1208-6045}, url={http://dx.doi.org/10.1139/p52-008}, DOI={10.1139/p52-008}, number={2}, journal={Canadian Journal of Physics}, publisher={Canadian Science Publishing}, author={Crawford, M. F. and Welsh, H. L. and Harrold, J. H.}, year={1952}, month=mar, pages={81–98} }

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