Internal energies and specific heats of condensed neon and argon system
We report results from molecular dynamic computations for internal energy and specific heat of condensed neon and argon systems in the temperature range 9-85 K modeled by Lennard Jones and Aziz potentials. Our motivation lies in the availability of direct experimental measurements of kinetic energie...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
1999
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| Online Access: | http://psasir.upm.edu.my/id/eprint/114102/ http://psasir.upm.edu.my/id/eprint/114102/1/114102.pdf |
| _version_ | 1848866406424117248 |
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| author | Asger, Mohammed Usmani, Q.N. |
| author_facet | Asger, Mohammed Usmani, Q.N. |
| author_sort | Asger, Mohammed |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | We report results from molecular dynamic computations for internal energy and specific heat of condensed neon and argon systems in the temperature range 9-85 K modeled by Lennard Jones and Aziz potentials. Our motivation lies in the availability of direct experimental measurements of kinetic energies of these systems by deep inelastic neutron scattering experiments at various densities. The measured kinetic energies, specific heats and other thermodynamic quantities are calculated using Wigner Kirkwood expansion with terms of the O(Latin small letter h with stroke)6) in the expansion. We take advantage in using more realistic Aziz potential in our calculation. Neon results are in agreement with experiments at 18 K and above. Results are consistent with path integral Monte Carlo calculations over the entire temperature range considered and slightly higher than the effective potential Monte Carlo results. The kinetic energy results of solid argon are also consistent with self-consistent average phonon model calculations. The results are in quantitative agreement with experiment. © 1999 Elsevier Science B.V. All rights reserved. |
| first_indexed | 2025-11-15T14:20:06Z |
| format | Article |
| id | upm-114102 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T14:20:06Z |
| publishDate | 1999 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1141022024-12-10T01:46:20Z http://psasir.upm.edu.my/id/eprint/114102/ Internal energies and specific heats of condensed neon and argon system Asger, Mohammed Usmani, Q.N. We report results from molecular dynamic computations for internal energy and specific heat of condensed neon and argon systems in the temperature range 9-85 K modeled by Lennard Jones and Aziz potentials. Our motivation lies in the availability of direct experimental measurements of kinetic energies of these systems by deep inelastic neutron scattering experiments at various densities. The measured kinetic energies, specific heats and other thermodynamic quantities are calculated using Wigner Kirkwood expansion with terms of the O(Latin small letter h with stroke)6) in the expansion. We take advantage in using more realistic Aziz potential in our calculation. Neon results are in agreement with experiments at 18 K and above. Results are consistent with path integral Monte Carlo calculations over the entire temperature range considered and slightly higher than the effective potential Monte Carlo results. The kinetic energy results of solid argon are also consistent with self-consistent average phonon model calculations. The results are in quantitative agreement with experiment. © 1999 Elsevier Science B.V. All rights reserved. Elsevier 1999 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/114102/1/114102.pdf Asger, Mohammed and Usmani, Q.N. (1999) Internal energies and specific heats of condensed neon and argon system. Physica B: Condensed Matter, 271 (1-4). pp. 104-115. ISSN 0921-4526; eISSN: 0921-4526 https://linkinghub.elsevier.com/retrieve/pii/S0921452699002306 10.1016/s0921-4526(99)00230-6 |
| spellingShingle | Asger, Mohammed Usmani, Q.N. Internal energies and specific heats of condensed neon and argon system |
| title | Internal energies and specific heats of condensed neon and argon system |
| title_full | Internal energies and specific heats of condensed neon and argon system |
| title_fullStr | Internal energies and specific heats of condensed neon and argon system |
| title_full_unstemmed | Internal energies and specific heats of condensed neon and argon system |
| title_short | Internal energies and specific heats of condensed neon and argon system |
| title_sort | internal energies and specific heats of condensed neon and argon system |
| url | http://psasir.upm.edu.my/id/eprint/114102/ http://psasir.upm.edu.my/id/eprint/114102/ http://psasir.upm.edu.my/id/eprint/114102/ http://psasir.upm.edu.my/id/eprint/114102/1/114102.pdf |