Extraction of the density of phonon states in LiH and NaH

被引：12

作者：

Colognesi, D. ^{[1
]}

Ramirez-Cuesta, A. J. ^{[2
]}

Zoppi, M. ^{[1
]}

Senesi, R. ^{[3
]}

Abdul-Redah, T. ^{[2
,4
]}

机构：

[1] CNR IFAC, I-50019 Sesto Fiorentino, FI, Italy

[2] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[3] UdR Tor Vergata, INFM, I-00133 Rome, Italy

[4] Univ Kent, Phys Lab, Canterbury CT2 7NR, Kent, England

来源：

PHYSICA B-CONDENSED MATTER | 2004年 / 350卷 / 1-3期

关键词：

Alkali hydrides; Density of phonon states; Inelastic neutron scattering;

D O I：

10.1016/j.physb.2004.03.271

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The inelastic neutron scattering spectra of LiH and NaH have been measured at low temperature. After an accurate evaluation of multiple scattering and multiphonon contributions, the proton-projected density of phonon states has been extracted for both samples. The NaH spectrum was previously totally unknown, while, as far as LiH is concerned, the present result substantially improves old neutron measurements, showing a better agreement with the existing lattice dynamics calculations. The proton mean kinetic energy in LiH, derived from the density of phonon states, is compared to new deep inelastic neutron scattering results. (C) 2004 Elsevier B.V. All rights reserved.

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收藏

页码：E983 / E986

页数：4

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