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Isotopic and spin-nuclear effects in solid hydrogens (Review Article)

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dc.contributor.author Freiman, Y.A.
dc.contributor.author Crespo, Y.
dc.date.accessioned 2021-01-31T20:36:57Z
dc.date.available 2021-01-31T20:36:57Z
dc.date.issued 2017
dc.identifier.citation Isotopic and spin-nuclear effects in solid hydrogens (Review Article) / Y.A. Freiman, Y. Crespo // Физика низких температур. — 2017. — Т. 43, № 12. — С. 1687-1706. — Бібліогр.: 97 назв. — англ. uk_UA
dc.identifier.issn 0132-6414
dc.identifier.other PACS: 67.80.ff
dc.identifier.uri http://dspace.nbuv.gov.ua/handle/123456789/175360
dc.description.abstract The multiple isotopic family of hydrogens (H₂, HD, D₂, HT, DT, T₂) due to large differences in the de Boer quantum parameter and inertia moments displays a diversity of pronounced quantum isotopic solid-state effects. The homonuclear members of this family (H₂, D₂, T₂) due to the permutation symmetry are subjects of the constraints of quantum mechanics which link the possible rotational states of these molecules to their total nuclear spin giving rise to the existence of two spin-nuclear modifications, ortho- and parahydrogens, possessing substantially different properties. Consequently, hydrogen solids present an unique opportunity for studying both isotope and spin-nuclear effects. The rotational spectra of heteronuclear hydrogens (HD, HT, DT) are free from limitations imposed by the permutation symmetry. As a result, the ground state of these species in solid state is virtually degenerate. The most dramatic consequence of this fact is an effect similar to the Pomeranchuk effect in ³He which in the case of the solid heteronuclear hydrogens manifests itself as the reentrant broken symmetry phase transitions. In this review article we discuss thermodynamic and kinetic effects pertaining to different isotopic and spin-nuclear species, as well as problems that still remain to be solved. uk_UA
dc.description.sponsorship The authors are deeply indebted to Erio Tosatti and Mikhail Strzhemechny for numerous fruitful discussions. uk_UA
dc.language.iso en uk_UA
dc.publisher Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України uk_UA
dc.relation.ispartof Физика низких температур
dc.title Isotopic and spin-nuclear effects in solid hydrogens (Review Article) uk_UA
dc.type Article uk_UA
dc.status published earlier uk_UA


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