Ti-T靶中~3He测量

THE MEASUREMENT OF CONCENTRATION RATIOS OF ~3He TO T ATOMS IN T-Ti TARGETS

摘要: <正> 一、引言轻元素在材料中的含量及分布情况,是应用物理、应用技术等领域感兴趣的问题。目前,国外正在用各种核技术对此进行测量和研究。通常使用的Ti-T靶,因T的β衰变(T_(1/2)为12.33a),靶内~3He的含量将随制成靶的时间不同而变化。本文试图通过对不同时间制备的Ti-T靶中~3He的测量,探索测量和分析~3He的某种途径。

Abstract: The concentration ratios of ~3He to T atoms (abbr. ~3He/T) in two titaniumtritade targets have been measured using the deuteron induced nuclear reactions~3He(d, p)~4He and T(d, n)~4He at the energies of 250 keV, 500 keV and 1000keV. The calculated ~3He/T in the two targets, by the disintegrating rate formula,are 6.78% and 56.96% respectively. The determined ~3He/T in the two targets are4.85% and 58.0% respectively.