DOI: 10.1063/1.445878. Structure and intermolecular excitations of β-N2 at 400 MPa and 55 K

Structure and intermolecular excitations of β-N2 at 400 MPa and 55 K

10.1063/1.445878

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

Elastic and inelastic neutron scattering measurements have been made on a single crystal of β-N2 at 55 K and a pressure of 400 MPa. The integrated intensities of 34 Bragg reflections were measured and analyzed in terms of symmetry-adapted harmonics. None of the coefficients of the higher-order harmonics could be determined and, within experimental error, the N2 molecule is randomly oriented. No well-defined librational modes were observed and even translational acoustic phonons are broad. The line shapes of translational acoustic phonons propagating along the hexagonal axis are analyzed in terms of both Gaussian and Lorentzian line shapes and in terms of the Michel–Naudts theory of rotation–translation interactions. In terms of the latter theory, β-N2 is in the slow relaxation regime and has a strong rotation–translation interaction. The temperature dependence observed for four of these line shapes suggests that the librational excitations are no longer overdamped at 46 K. Values for three of the elastic constants were determined and are (in units of 109 N m−2): C11=4.43±0.14, C33=5.92±0.14, and C44=0.61±0.02.

Bibliography

Powell, B. M., Dolling, G., & Nieman, H. F. (1983). Structure and intermolecular excitations of Î²-N2 at 400 MPa and 55 K. The Journal of Chemical Physics, 79(2), 982â991.

Authors 3

B. M. Powell (first)
G. Dolling (additional)
H. F. Nieman (additional)

References 37 Referenced 38

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Dates

Type	When
Created	22 years, 6 months ago (Feb. 28, 2003, 12:03 p.m.)
Deposited	1 year, 6 months ago (Feb. 7, 2024, 5:03 p.m.)
Indexed	2 months ago (July 1, 2025, 8:47 a.m.)
Issued	42 years, 1 month ago (July 15, 1983)
Published	42 years, 1 month ago (July 15, 1983)
Published Print	42 years, 1 month ago (July 15, 1983)

Funders 0

None

BibTeX

@article{Powell_1983, title={Structure and intermolecular excitations of β-N2 at 400 MPa and 55 K}, volume={79}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.445878}, DOI={10.1063/1.445878}, number={2}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Powell, B. M. and Dolling, G. and Nieman, H. F.}, year={1983}, month=jul, pages={982–991} }

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