Measured total cross sections of slow neutrons scattered by solid deuterium and implications for ultracold neutron sources.
Measured total cross sections of slow neutrons scattered by solid deuterium and implications for ultracold neutron sources.
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测量的固体氘散射慢中子的总横截面及其对超冷中子源的影响。
DOI：
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发表时间：
2005
影响因子：
8.6
通讯作者：
J. Zmeskal
中科院分区：
文献类型：
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作者：
F. Atchison;B. Blau;B. van den Brandt;T. Bryś;M. Daum;P. Fierlinger;P. Hautle;R. Henneck;S. Heule;K. Kirch;J. Kohlbrecher;G. Kühne;J. A. Konter;A. Pichlmaier;A. Wokaun;K. Bodek;M. Kasprzak;M. Kuźniak;P. Geltenbort;J. Zmeskal
测量了18和5 K时，从液体中冻结的固体邻-2 H2的能量在100 neV至3 meV范围内的慢中子的总散射截面。18 K截面被发现是在极好的协议与理论预期和超冷中子为主的热向上散射。在5 K时，总散射截面被发现是占主导地位的晶体缺陷起源于温度诱导的应力，但不恶化的温度循环之间的5和10 K。
The total scattering cross sections for slow neutrons with energies in the range 100 neV to 3 meV for solid ortho-2H2 at 18 and 5 K, frozen from the liquid, have been measured. The 18 K cross sections are found to be in excellent agreement with theoretical expectations and for ultracold neutrons dominated by thermal up scattering. At 5 K the total scattering cross sections are found to be dominated by the crystal defects originating in temperature induced stress but not deteriorated by temperature cycles between 5 and 10 K.