<SUP>7</SUP>Be半衰期的精确测量

⁷Be半衰期的精确测量

摘要: 用两套γ谱仪精确测量了注入到天然铍和天然金中的⁷Be发生电子俘获的半衰期.测得⁷Be在天然铍中半衰期为53.275(25)d,在天然Au中为53.270(19)d.该结果还表明,在这两种材料中⁷Be半衰期的相对变化小于0.12%. The half-life of ⁷Be implanted in natural beryllium and in natural gold has been measured with high precision using two high-purity germanium detectors. T_(1/2)=53.275(25) d in natural beryllium and T_(1/2)=53.270(19) d in natural gold is obtained. Within our experimental precision, the difference in the effect of host media beryllium and gold on the half-life of ⁷Be isn t observed and an upper limit 0.12% of this effect can be set.

Abstract: The half-life of ⁷Be implanted in natural beryllium and in natural gold has been measured with high precision using two high-purity germanium detectors. T_(1/2)=53.275(25) d in natural beryllium and T_(1/2)=53.270(19) d in natural gold is obtained. Within our experimental precision, the difference in the effect of host media beryllium and gold on the half-life of ⁷Be isn t observed and an upper limit 0.12% of this effect can be set.