首页 | 本学科首页   官方微博 | 高级检索  
     


A search for anharmonic effects in NpO2 at low temperature by neutron diffraction
Affiliation:1. Department of Chemistry, Washington State University, Pullman, WA 99164, United States;2. Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, WA 99164, United States;3. Materials Science and Engineering Program, Washington State University, Pullman, WA 99164, United States;4. Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States;5. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States;6. X-Ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, United States;7. School of Molecular Sciences and Center for Materials of the Universe, Arizona State University, Tempe, AZ 85287, United States
Abstract:A single crystal neutron diffraction experiment has been performed on NpO2 to search for anomalies in the Debye-Waller factors associated with the as yet unexplained 25 K phase transition. Data were collected out to a maximum momentum transfer of 16 Å−1. A detailed analysis shows no significant changes of the thermal parameters when cooling below 25 K. This result effectively eliminates the most recent proposal that a dynamical distortion of the oxygen sublattice occurs.
Keywords:
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号