在兰州放射性束流装置RIBLL上，利用磁刚度Bρ、飞行时间tTOF和多重望远镜ΔE-E联合探测方法测量了89MeV/u36Ar轰击Be靶产生的P同位素碎片的同位素分布，并与EPAX经验公式的计算结果进行了比较，在质子滴线区首次鉴别出了新核素25P．
The mass distribution of the phosphor fragments induced by projectile fragmentation reaction of 69 MeV/u 36Ar ＋ 9Be was measured at the projectile-fragment separator RIBLL at IMP. The fragment products were identified by determining the magnetic rigidity Bρ, the time of flight tTor and their energy loss ΔE. The experimental isotope distribution was compared to the result of the empirical parameterization EPAX. Three events for the new nuclide 25p in the region of proton drip line were found in experiment of five days.
参考文献
| [1] | Cole B J. Proton and Two-proton Drip Lines in the sd Shell [J]. Phys Rev, 1998, C58:2 831－2 839. |
| [2] | Chen B Q, Ma Z Y, Gruemmer F et al. Relativistic Mean-field Theory Study of Proton Halos in the 2sld Shell [J]. J Phys G: Nucl Part Phys, 1998, 24: 97－105. |
| [3] | Ren Zhongzhou, Mittig W, Sarazin F. Relativistic Mean-field Study on Proton Skins and Proton Halos in Exotic Nuclei[J].Nucl Phys, 1999, A652: 250－270. |
| [4] | Brown B A, Hansen P G. Proton Halos in the 1s0d Shell[J].Phys Lett, 1996, B381: 391－396. |
| [5] | Ren Zhong zhou, Chen Bao qiu, Ma Zhong yu et al. One-proton Halo in Z6P and Two-proton Halo in S[J]. Phys Rew,1996, C53: R572－R575. |
| [6] | Navin A, Bazin D, Brown B A et al. Spectroscopy of Radioactive Beams from Single-nucleon Knockout Reactions: Application to the sd shell nuclei 25Al and 26,27,Z8p[J]. Phys Rev Lett, 1998, 81:5 089－5 092. |
| [7] | 詹文龙,郭忠言,刘冠华等.兰州放射性束流线[J]中国科学,1999,A29：77?4；詹文龙,郭忠言.兰州放射性核束流线[J].原子核物理评论,1999,16(4)：218-223. |
| [8] | 肖国青,詹文龙,郭忠言.RIBLL的状态及开展的部分实验结果[J].原子核物理评论,1999,16(3)：145-147. |
| [9] | Blank B, chartier M, Czajkowski S et al. Discovery of Doubly Magic 48Ni[J]. Phys Rev Lett, 2000, 84:1 116－1 119 |
| [10] | Suemmerer K, Blank B. Modified Empirical Parametrization of Fragmentation Cross Sections[J]. Phys Rev, 2000, C61:034607-1－034607-10. |
| [11] | Ozawa A, Bochkarev O, Chulkov L et al. Production Crosssection of Light Neutron-rich Nuclei from 40Ar Fragmentation at about 1 GeV/nucleon[J]. Nucl Phys, 2000, A673: 411－422. |
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%