INTENSE POSITRON SOURCES BY PAIR CREATION WITH NEUTRON-CAPTURE GAMMA-RAYS

被引：32

作者：

KRUSCHE, B

SCHRECKENBACH, K

机构：

[1] Institut Laue-Langevin

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1990年 / 295卷 / 1-2期

关键词：

D O I：

10.1016/0168-9002(90)90435-9

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An intense source of positrons in the MeV range is described. The positrons were produced by pair production of high energy prompt γ-rays from neutron capture reactions. The source consisted of layers of titanium and platinum and it was placed in the high thermal neutron flux (3.3 × 1014 n/cm2s) at the BILL beta spectrometer of the High Flux Reactor, Grenoble. The beta spectrometer served as a tunable monochromator. The system yielded 2.5 × 106 e+/s in 10 cm of the focal plane, with a momentum dispersion of Δp/p = 1.5 × 10-3 cm-1. A model for the numerical simulation of this positron production method was developed and the data are compared with the calculated spectra. A future application of the present positron production technique is presented, using the layers of cadmium and tungsten to produce a beam of moderated positrons. © 1990.

引用

页码：155 / 171

页数：17

共 27 条

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