Ag110m的衰变纲图

利用γ闪烁谱仪和γ—γ符合谱仪,我们对Ag^110m衰变的γ射线进行了研究;提出了一个修正的衰变纲图,认为Cd¹¹⁰有656kev,1473kev,1540kev,2160kev,2219kev,2476kev和2924kev七个激发能级,包含有能量为448,620,656,679,705,741,764,817,884,936,1384,1473,1504和1560kev的14条γ射线。用符合方法,我们除了证实一般公认为有级联关系的γ射线之间有符合之外,还确定了1560kevγ射线在衰变图中的位置,证实了764kevγ射线应该放在1504kevγ射线的前面,并且指出,817kevγ射线是属于1473kev能级到656kev能级间的跃迁的。此外,还观察到1820kev和2268kev两个峰;经过用吸收方法分析,指出它们是由于低能量的γ射线“堆积”起来的迭加峰。

DECAY SCHEME OF Ag110m

The gamma-rays, cmitted in the decay of Ag^110m have been studied by use of gamma-spectro-meter and gamma-gamma coincidence techniques Fourteen gamma-rays have been found with energies of 448, 620, 656, 679, 705, 741, 764,817, 884, 936, 1384, 1473, 1504 and 1560 kw. All those gamma-rays can be fitted into seven excited levels in Cd¹¹⁰ of energies 656 kev, 1473 kev, 1540 kev, 2160 kev, 2219 kev, 2476 kev and 2924 kev respectively. The generally accepted cascade relationship between gamma-rays has been verified. Furthermore, coincidence measurements have pointed out that the 1560 kev gamma-ray is emitted during the transition between 2219 kev level and 656 kcv level, that the 817 kev gamma-ray belongs to transition beween 1473 kev level and 656 kev level, and that the 764 kev gamma-ray should proceed the 1504 kev gamma-ray. A modified decay schcml has been proposed.