摘要
利用脉冲化的T(d,n)~4He中子源、伴随粒子方法、Ge(Li)探测器和飞行时间技术测量了14.9MeV中子和铌反应在30°—140°之间七个角度上的分立γ线谱;由高分辨γ谱分析程序识别了79条谱线;初步确定了62条谱线所由产生的反应类型和跃迁能级,其中有40条谱线是在由中子诱发的核反应中首次发现的.定出了每条谱线在七个角度上的微分产生截面,结果表明该反应中的伴生γ发射基本上是各向同性的.
The gamma ray spectra from niobium under 14.9 MeV neutron bombardments were measured by means of a pulsed T(d, n)~4He neutron source, associated particle method, Ge(Li) detector and time-of-flight technique at 7 angles between 30° and 140°. 79 gamma lines were determined by a high resolution gamma spectrum analysis program, and reaction types and transition levels of 62 lines were rudely assigned. There were 40 ones of 79 lines, which were first found in reactions induced by neutrons. The differential cross sections of every gamma line at 7 angles were determined. It is shown that associated gamma ray emissions from this reaction are basically asotropic.
出处
《高能物理与核物理》
CSCD
北大核心
1989年第2期173-183,共11页
High Energy Physics and Nuclear Physics
基金
中国自然科学基金会
核工业部资助
