NEUTRON SPIN-ECHO MEASUREMENTS ON DENSE HYDROGEN GAS

被引：2
|
作者：
VERKERK, P
BAFILE, U
FARAGO, B
MEZEI, F
机构：
[1] CNR,IST ELETTRON QUANTIST,I-50127 FLORENCE,ITALY
[2] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE
来源：
PHYSICA B | 1991年 / 168卷 / 01期
关键词：
D O I：
10.1016/0921-4526(91)90185-H
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We measured the coefficient of self-diffusion D in high-density hydrogen gas at 120 K and 75 MPa by means of the neutron spin-echo technique. Because of the relatively large value of D the energy window of the spectrometer IN11 of the ILL had to be enlarged by means of additional Larmor coils with a small field integral. We find D = 0.0543 nm2ps-1 with an accuracy of 4%. This result is not inconsistent with time-of-flight incoherent neutron scattering measurements performed previously in Delft, but disagrees with NMR spin-echo data. An explanation might be found in the different time and space scales of the various methods.
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页码：1 / 8
页数：8
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