通过92Mo(58Ni,2p3n)熔合蒸发反应生成了非常缺中子核145Er.利用氦喷嘴带传输系统把研究目标核传输到低本底测量站,进行了质子-γ符合测量,得到了不受同量异位素干扰的145Erβ延发质子谱.经过仔细分析与延发质子符合的γ谱,发现了145Er的11/2-同核异能态具有β延发质子衰变性质.经拟合退激144Dy不同激发态γ跃迁的衰变曲线,得出145Er的1/2+基态和11/2-同核异能态的半衰期分别为(1.6±0.6)和(0.6±0.1)s.最后,简单介绍了中重质量区缺中子新核素的合成及衰变研究计划.
参考文献
| [1] | Wilmarth P A.Beta-delayed Proton Emission in Neutron-deficient Lanthanide Isotopes.Berkeley:LBL-26101,1988,73-96. |
| [2] | Xu Shuwei,Li Zhankui,Xie Yuanxiang,et al.Phys Rev,1999,C60:061302(R). |
| [3] | Xu Shuwei,Xie Yuanxiang,Li Zhankui.et al.Z Phys,1996,A356:227. |
| [4] | Li Zhankui,Xu Shuwei,Xie Yuanxiang,et al.Phys Rev,1997,C56:1157. |
| [5] | Gui S Z,Colombo G,Nolto E.Z Phys,1982,A305:297. |
| [6] | Firestone R B,Gilat J,Nitsehke J M,et al.Phys Rev,1991,C43:1066. |
| [7] | Redon N,Ollivier T,Beraud R,et al.Z Phys,1986,A325:127. |
| [8] | Goettig L,Gelletly W,Lister C J,et al.Nuc Phys,1987,A464:159. |
| [9] | Zheng Yong,Zhou Xiaohong,Zhang Yuhu,et al.J Phys (London),2004,G30:465. |
| [10] | Ginter T N,Batchelder J C,Bingham C R,et al.Phys Rev,2003,C68:034330. |
| [11] | Tantawy M N,Bingham C R,Rykaczewski K P.et al.Phys Rev,2006,C73:024316. |
| [12] | Nitschke J M,Wilmarth P A,Gilat J,et al.Phys Rev,1988,C37:2694. |
| [13] | Blank B,Borge M J G.Progress in Particle and Nuclear Physics,2008,60:403. |
| [14] | Davids C N,Woods P J,Seweryniak D,et al.Phys Rev,1998,L80:1849. |
| [15] | Rykaczewski K P.Eur Phys J,2002,A15:81. |
| [16] | Xu Shuwei,Xie Yuanxiang,Li Zhankui,et al.Z Phys,1996,A356:227. |
| [17] | Xie Yuanxiang,Xu Shuwei,Li Zhankui,et al.Eur Phys J,1999,A6:239. |
| [18] | Xu Shuwei,Li Zhankui,Xie Yuanxiang,et al.Phys Rev,2001,C64:017301. |
| [19] | Xu Shuwei,Li Zhankui,Xie Yuanxiang,et al.Eur Phys J,2001,A12:1. |
| [20] | Xu Shuwei,Xie Yuanxiang,Xu Furong,et al.Eru Phys J,2004,A21:75. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%