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通过对~(32)S+Ca 反应中衰变质子谱的观测,发现了一组新的质子谱线,其能量为(4.07±0.05)MeV,对应的半衰期为(32±10)ms,经反应道分析及与理论预言比较,确定该质子活性来源于~(40)Ca(~(32)S,3n)反应产生的~(69)Kr 的β延迟质子衰变,它相应于由~(69)Br 中的 T=3/2同位旋相似态到~(68)Se 基态的质子跃迁.基于测量结果与库仑位移能计算,得到~(69)Kr 的质量剩余为(-32.15±0.30)MeV,并提出了~(69)Kr 的部分衰变纲图.
By observing the decay proton spectrum in the ~ (32) S + Ca reaction, a new proton spectrum was found with an energy of (4.07 ± 0.05) MeV and a corresponding half-life of (32 ± 10) ms. Compared with theoretical predictions, this proton activity is determined to be derived from the β-delayed proton decay of ~ (69) Kr produced by ~ (40) Ca (~ 32) S, The proton transition from T = 3/2 isomorphism to ~ (68) Se in Br was calculated. Based on the measurement results and the Coulomb displacement energy calculation, the mass residual of ~ (69) Kr was -32.15 ± 0.30 MeV, The partial decay of ~ (69) Kr is proposed.