THE NEUTRON-INDUCED BACKGROUND IN GALLEX

被引:33
作者
CRIBIER, M
PICHARD, B
SOIRAT, JP
SPIRO, M
STOLARCZYK, T
TAO, C
VIGNAUD, D
BELLI, P
DANGELO, S
WINK, R
机构
[1] UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00173 ROME,ITALY
[2] IST NAZL FIS NUCL,SEZ ROMA 2,I-00173 ROME,ITALY
[3] MAX PLANCK INST KERNPHYS,D-69029 HEIDELBERG,GERMANY
关键词
D O I
10.1016/0927-6505(95)00025-C
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A radiochemical experiment has been performed in the Gran Sasso Underground Laboratory to measure the fast neutron flux in the environment of the GALLEX Solar Neutrino experiment. Neutrons are detected via the reaction n + Ca-40 --> Ar-37 + He-4 and the calcium target is in the form of 470 l of a calcium nitrate solution. It is found that only 0.44 +/- 0.24 Ar-37 atom is produced per day. This leads to a neutron flux above 2.5 MeV of (0.9 +/- 0.6) x 10(-7) cm(-1) . s(-1). An evaluation of the neutron induced background in the GALLEX experiment is done using a Monte Carlo simulation program. The value obtained, 0.15 +/- 0.10 SNU, is about 0.2% of the signal measured by GALLEX.
引用
收藏
页码:23 / 32
页数:10
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