【摘要】 通过β延迟质子发射鉴定出了在⁴⁰Ca(²⁸Si,3n)反应中产生的一个具有T_z=-3/2,A=4n+1的核素⁶⁵Se。观察到其单质子能量为3.70±0.08MeV,实验测定的半衰期为9.6_-4.1^+5.3ms,它相应于由⁶⁵Se基态到⁶⁵As中最低的T=3/2相似态的超允许β跃迁和随后由此态到⁶⁴Ge基态的质子发射。基于这些结果并结合库仑位移能计算,得到⁶⁵Se的质量剩余为-33.26±0.25MeV。更多还原

【Abstract】 65Se, a nuclide with Tz=-3/2, A = 4n+1 produced in 40Ca (28Si, 3n) reaction was identified via its B-delayed proton emission. A single proton group at 3. 70 + 0. 08 MeV was observed and its half-life was experimentally determined to be 9. 6+5.3/4.1 ms which was corresponding to superallowed B transition from ground state of 65Se to the isospin analog state, the lowest T= 3/2 state, in 65As and the subsequent proton emission to the ground state of 64Ge. Based on these results combining with coulomb displacement energy calculation, the mass excess of 65Se was obtained as -33. 26+0. 25 MeV.更多还原