A facility for producing high purity thermal neutron beam and its design

Zongren Shi; Xiantang Zeng; Ming Zhang

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A facility for producing high purity thermal neutron beam and its design

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- A facility for producing high purity thermal neutron beam and its design
- Nuclear Techniques Vol. 12, Issue 3, (1989)
- 作者机构：
  
  中国原子能科学研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：18 May 1987，
  
  Published：1989-03
- 稿件说明：
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Zongren Shi, Xiantang Zeng, Ming Zhang. A facility for producing high purity thermal neutron beam and its design[J]. Nuclear techniques, 1989, 12(3): 143-148.
DOI：

Zongren Shi, Xiantang Zeng, Ming Zhang. A facility for producing high purity thermal neutron beam and its design[J]. Nuclear techniques, 1989, 12(3): 143-148. DOI：

摘要

在10MW重水反应堆水平孔道建成了液氮冷却单晶硅的高纯热中子束装置。在液氮温度下，热中子注量率是1.3×10

、镉比30000。本文详细地描述了中子准直器的设计原理，并导出了计算公式。在束张角相同时，锥形准直器的中子注量率是直管准直器的1—4倍。本文也计算了经50cm单晶硅的热中子谱及热中子和快中子透射率同单晶硅长度的关系。理论和实验符合。

Abstract

Tne facility has been set up on the 10 MW heavy water reactor in the Institute of Atomic Energy. A 50 cm long single crystal silicon cooled by liquid nitrogen is used for improving the quality of thermal column. At 77K

the neutron flux is 1.3×10

Cd-ratio is 30000 and

-dose in the beam is 1.935×10

-8

C/kg·s.

The calculation of the neutron collimetor is given in detail. Neutron flux for a conical collimator is 1-4 times more than that for a straight collimator with the same angle converging. The relations of flux and angular divergence with the shape of collimator are described.

关键词

Keywords

references

石宗仁，物理， 8 （ 1986 ）, 489 .

A. Langsdert , Fast Neutron Physics , 1 （ 1960 ）, 721 .

S. C. Gujrathi et al . , Nucl. Instr. Meth . , 100 （ 1972 ）, 445 .

B. N. Brockhouse et al . , Rev. Sci. Instr . , 30 （（ 1959 ）, 136 .

R. M. Brugger et al . , Nucl. Instr. Meth . , 135 （ 1976 ）, 289 .

M. A. Lone et al . , Nucl. Instr. Meth . , 174 （ 1980 ）, 521 .

R. Moreh et al . , Nucl. Instr. Meth . , 155 （ 1978 ）, 429 .

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