~(131)I和~(134)Cs核的衰变研究
STUDY OF THE DECAY OF ~(131)I AND ~(134)Cs
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摘要: <正> ~(131)I是一个短寿命核素,它的半衰期仅有8.02 d,但是这个核素在医学等领域内有广泛的用途,在80—475 keV能区内有七条较强的γ射线可用来刻度Ge探测器的效率。~(134)Cs有较长的寿命(T(1/2)=745.2 d),它在475—1400 keV能区内发射十条较强的γ射线,它和~(131)I合用在80—1400 keV能区可作为标准源刻度Ge探测器效率。一些作者已研究过这两个核素。本工作的目的是精确测定相对γ线发射几率和对一些较强级联γ射线作符合计数修正。Abstract: Relative emission probabilities of gamma-rays from the decay of ~(131)I and ~(134)Cs are measured with a calibrated coaxial Ge detector. Experimental uncertainties are about ±1% (1σ) for strong gammarays. These two nuclides are useful for the calibration of Ge detector in 80—1400 keV.
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