靶室结构对中子绝对产额测量的影响

Influence of the target chamber structure on measuring absolute neutron yield

介绍了D-T反应使用的结构不同的三种靶室,对不同角度上监测的伴随α粒子谱进行了比较和分析,改进的单管靶室大大地降低了散射的α粒子的本底,α粒子的峰谷比值达到450,α粒子的和峰明显,其计数约占α粒子总数的1.8%,此外,由D(d,p)T反应的能量1.01MeV的氚粒子产生的一个小峰清晰可见。

The three target chambers of different structures adapted in D-T reaction were introduced. Accompanied α-particle spectra at different direction to D＋ beam were monitored and compared. Background from scattered α particles was reduced obviously using improved single chamber, and ratio of peak to valley of α-particle spectrum was about 450 ： 1. Accounts of sum peak from two α particles were 1.8% of total ones of α-particle spectrum. The small peak of tritium particles with 1.01MeV resulting from D （d, p） T reaction was seen clearly.