On the microscopic structure of liquid hydrogens
Among the quantum liquids, the hydrogens cover an interesting position between liquid helium, where quantum exchange gives rise to the macroscopic phenomenon of superfluidity, and neon, where quantum effects are relatively small, so that its features can be evaluated by perturbation methods with...
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| Datum: | 2001 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Інститут фізики конденсованих систем НАН України
2001
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| Schriftenreihe: | Condensed Matter Physics |
| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/120434 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | On the microscopic structure of liquid hydrogens / M. Zoppi, M. Celli, U. Bafile, E. Guarini, M. Neumann // Condensed Matter Physics. — 2001. — Т. 4, № 2(26). — С. 283-297. — Бібліогр.: 26 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | Among the quantum liquids, the hydrogens cover an interesting position
between liquid helium, where quantum exchange gives rise to the macroscopic
phenomenon of superfluidity, and neon, where quantum effects are
relatively small, so that its features can be evaluated by perturbation methods
with reference to a classical system. Nonetheless, the experimental
access to the microscopic structure of the hydrogens is not an easy task
both because of their intra-molecular structure and the small molecular
mass that is comparable with that of the neutron probe. In this paper we
discuss the state of the art and summarise the available experimental information
on the microscopic structure of the hydrogens. The experimental
data for the two systems are compared among them and with the results
of quantum Path Integral Monte Carlo simulations. It is found that similar
quantities, measured in corresponding thermodynamic points, are rather
different for the two systems due to the different weight of quantum effects.
Moreover, the comparison with the simulation results shows that, for deuterium,
there is a substantial agreement, both at the level of the structure
factor and its thermodynamic derivatives. The agreement is less satisfactory
for liquid hydrogen. |
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