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中国科学院上海原子核研究所
收稿日期:1983-10-12,
纸质出版日期:1984-06
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田家祺, 肖根来, 刘静怡, 等. 1.2米回旋加速器在束γ能谱实验条件的探索[J]. 核技术, 1984,07(6):41-42,67.
Jiaqi Tian, Genlai Xiao, Jingyi Liu, et al. The exploration of experimental condition in beam
在我所回旋加速器上进行在束
γ
能谱学的研究工作,由于加速器的束流聚焦性能不够理想,造成严重的中子、
γ
本底,使工作存在一定的困难。经采取相应措施后,已初步达到在束
γ
能谱实验的要求,并测得了
199
Tl的在束
γ
能谱。
Because of the poor focusing performance of the beam from our 1.2 m cyclotron
the background gamma ray and neutron are very high in the target hall. Particularly
the high intensity neutron will damage the Ge (Li) detector. A proper shield assembly is used to decrease the interference of such background and the level of background neutron is reduced to 2—3 neutrons/cm
2
•s. On this condition the in beam
γ
-ray spectra of
199
Tl from the
197
Au (
α
2n
γ
) reaction have been measured.
P. H. Stelson et al., Nucl. Instr. Meth ., 98 , 481 ( 1972 ).
J. O. Newton et al., Nucl. Phys ., A148 , 593 ( 1970 ).
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