A possibility of parallel and anti-parallel diffraction measurements on neutron diffractometer employing bent perfect crystal monochromator at the monochromatic focusing condition

Pramana

Pivel Mikula2¹  Sung Baek Kim²  Sung Kyu Kim²  Yong Nam Choi²  Shin Ae Kim²  Chang-Hee Lee² 

[1] Nuclear Physics Institute, 25068 Rez, Czech Republic$$;HANARO Center, Korea Atomic Energy Research Institute, Yuseong, Daejeon 305-600, Korea$$

关键词: Neutron diffractometer;    bent crystal monochromator;    monochromatic focusing.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

In a conventional diffractometer having single monochromator, only one position, parallel position, is used for the diffraction experiment (i.e. detection) because the resolution property of the other one, anti-parallel position, is very poor. However, a bent perfect crystal (BPC) monochromator at monochromatic focusing condition can provide a quite flat and equal resolution property at both parallel and anti-parallel positions and thus one can have a chance to use both sides for the diffraction experiment. From the data of the FWHM and the 𝛥 𝑑/𝑑 measured on three diffraction geometries (symmetric, asymmetric compression and asymmetric expansion), we can conclude that the simultaneous diffraction measurement in both parallel and anti-parallel positions can be achieved.

【 授权许可】

Unknown