Nen β-Delayed Proton Decays in the Rare-Enrth Region Near the Proton Drip Line

XU Shu-Wei; LI Zhan-Kui; XIE Yuan-Xiang; YU Yong; PAN Qiang-Yan; WANG Chun-Fang; XING Jian-Ping; MA Rui-Chang; CE Yuan-Xiu; WANG Xu-Dong

Chinese Physics C> 2000, Vol. 24> Issue(S1) : 73-80

Nen β-Delayed Proton Decays in the Rare-Enrth Region Near the Proton Drip Line

Institute of Modern Physics,Tthe Chinese Acadmy of Sciences,Lanzhou 730000,China

Abstract
HTML
Reference
Related

PDF

Abstract：
The β-delayed proton precursors ¹²⁵Nd,¹²⁸Pm,¹²⁹Sm,¹³⁷Gd and ¹³⁹Dy near the proton dripline were produced by the irradiation of ⁹²Mo,⁹⁶Ru and ¹⁰⁶Cd with an ³⁶Ar beam,and conclusively identified for the first time by using proton-gamma coincidence in combination with a He-jet tape transport system.Their half-lives were determined to be 0.60(15)s,1.0(3)s,0.55(10)s,2.2(2)s and 0.6(2)s,respectively.The measured energy spectra of β-delayed protons and esimated proton branching ratios to the final states in "daughter"nuclei for the precursors ¹²⁵Nd,¹²⁹Sm,¹³⁷Gd and ¹³⁹Dy,as well as the previously reported ones for the precursors ¹³⁵Gd and ¹²¹Ce,were fitted by a statistical model calculation.The ground-state spins and and parities of ¹²¹Ce,¹²⁵Nd,¹²⁹Sm,¹³⁵Gd,¹³⁷Gd and ¹³⁹Dy were then assigned as 5/2^±,5/2^±,1/2⁺(or 3/2⁺),5/2^±,7/2^± and 7/2,respectly.The consistency between the experimental spin-parity assignment and the predicted Nilsson diagrams indirectly indicates that ground states of ¹²¹Ce,¹²⁵Nd,¹²⁹Sm,¹³⁵Gd,¹³⁷Gd and ¹³⁹Dy are highly deformed with β₂～0.3.

References

[1]

Hofmann S. Radiochimica Acta, 1995, 70/71 : 932 Moller P, Nix J R, Myers W D et al. At. Data Nucl. Data Tables, 1995, 59:1853 XU Shu-Wei, XIE Yuan-Xi, LI Zhan-Kui et al. Z. Phys.,1996, M56:227; Science in China, 1997,A27(5) :434 (in Chinese)(徐树威，谢元祥，李占奎等.中国科学，1997,A,27(5):434)4 XU S W, LI Z K, XIE Y X et al. Phys. Rev., 1997, C60:061302(R)5 Larsson P O, Batisch T, Kirchner R et al. Z. Phys., 1983, A314 : 96 Livingston K, W d P J, Davis N J et al. Phys. Rev., 1993, C48:31137 Beraud R. Emsallem A, #196;kje J et al. Third INRP3-RIKEN Symposium on Heavy Ion Collisions, Tokyo, Japan, 1994,102; Workshop IGISOL-6,Dubna. Russia, 1997, 598 Iimura H, Katakura J, Kitao K et al. Nucl. Data Sheets, 1997, 80 :8959 Homsh#966;j P, Wilsky K, Hansen P G et al. Nucl. Phys., 1972, A187 :609; Hardy J C. Phys. Lett., 1982, B109: 24210 James A N, Momsm T P, Nolan P J et al. In: Eastham D A and Joy A eds. Nuclear Structure Appendix, Daresbury Annual Report 1985/86. Warrington, UK: Daresbury Laboratory. 1986, 10311 Mascrop R, Campbell M, Gelletly W et al. Nucl. Phys., 1989, A499 : 56512 Paul E S, Davis S, Vaska P et al., J. Physics (Landon), 1993, G19:86113 Nitschke J M, Cable M D, Zeite W D. Z. Phys., 1983, A312:26514 Lister C J, Varley B J, Moscrop R et al. Phys. Rev. Lett, 1985, 55: 81015 XU Shu-Wei, XIE Yuan-Xiang, LI Zhan-Kui et al. Phys. Rev., 1997, C56: 1157; XU Shu-Wei, XIE Yuan-Xiang, LI Zhan-Kui et al. Science in China, 1998,A28(5) :433(in Chinese)(徐树威，谢元祥，李占奎等.中国科学，1998,A,28(5): 433)16 Takahashi K, Yamada M, Kondoh T. At. Data Nucl. Data Tables; 1973, 12: 10117 Horiguchi T, Tachibana T, Katakuxa J. Charts of the Nuclides, 199618 Hirsch M, Staudt A, Muto K et al. At. Data Nucl. Data Tables, 1993, 53: 16519 Moller P, Nix J R, Kratz K-L. At. Data Nucl. Data Tables, 1997, 66 : 13120 Winn W G, Gutbd H H, Blann M. Nucl. Phys., 1972, A188:42321 Arseniev D A, Sobiczewski A, Solview V G. Nucl. Phys., 1969, A126 : 1522 BengtsonT, Ragnarsson I. Nucl. Phys., 1985, A436:14; Firestone R B. Table of Isotopes, 8th ed. 1996, Vol. Ⅱ,Appedix H, H-7 and H-823 Audi G. Bersillon O, Blachot J et al. Nucl. Phys., 1997, A624:1

[1]	XU Qiang , GUO Jian-You , ZHU Sheng-Jiang . Pseudospin Symmetry and Spin Symmetry in Sn Isotopes from the Proton Drip Line to the Neutron Drip Line. Chinese Physics C, 2007, 31(2): 168-172.
[2]	WANG Hua-Lei , ZHANG Yu-Hu , ZHOU Xiao-Hong , GUO Ying-Xiang , LEI Xiang-Guo , XIE Yuan-Xiang , XU Shu-Wei , XING Ye-Bing , ZHENG Yong , LIU Min-Liang , XIE Cheng-Ying , SONG Li-Tao , , , , . β⁺/EC-Decay Study of ¹⁷⁶Ir Neutron-Deficient Isotope. Chinese Physics C, 2006, 30(3): 201-206.
[3]	LOU Jian-Ling , LI Zhi-Huan , YE Yan-Lin , CAO Zhong-Xin , JIANG Dong-Xing , HUA Hui , ZHENG Tao , LI Xiang-Qing , GE Yu-Cheng , WU Cui-E , LI Chen , PANG Dan-Yang , LU Fei , FAN Feng-Ying , MA Li-Ying . Property Optimization and Test for β-Delayed Neutron Detection Array. Chinese Physics C, 2006, 30(S2): 205-207.
[4]	XU Shu-Wei , XIE Yuan-Xiang , XING Ye-Bing , XU Fu-Rong , LIU Hong-Liang , LI Zhan-Kui . β-Delayed Proton Decays of ¹⁴⁰Tb and ¹⁴¹Dy as Well as the Spin and Parity of ¹⁴³Dy. Chinese Physics C, 2006, 30(6): 526-529.
[5]	XU Shu-Wei , XIE Yuan-Xiang , LI Zhan-Kui , XU Fu-Rong , LIU Hong-Liang . β-Delayed Proton Decays of ¹³³Sm and ¹⁴⁹Yb. Chinese Physics C, 2006, 30(11): 1067-1070.
[6]	XU Shu-Wei , LI Zhan-Kui , XIE Yuan-Xiang , GUO Wen-Tao . β-Delayed Proton Decays in the Rare-Earth Region Near Drip Line. Chinese Physics C, 2006, 30(S2): 131-135.
[7]	XU Shu-Wei , XIE Yuan-Xiang , XU Fu-Rong , LI Zhan-Kui , WANG Xu-Dong , XING Ye-Bing . Further Identification of the Decay of ¹²⁹Pm Near the Proton Drip Line. Chinese Physics C, 2005, 29(3): 237-239.
[8]	XU Shu-Wei , XIE Yuan-Xiang , LI Zhan-Kui , WANG Xu-Dong . New Nuclide ¹²⁹Pm Near the Proton Drip Line. Chinese Physics C, 2004, 28(2): 158-160.
[9]	XU Shu-Wei , LI Zhang-Kui , XIE Yuan-Xiang , HUANG Wen-Xue , SHU Neng-Chuan , CHEN Yong-Shou , XU Fu-Rong , WANG Kun . β-Delayed Proton Decays Near the Proton Drip Line. Chinese Physics C, 2004, 28(S1): 1-4.
[10]	WANG Xu-Dong , XU Shu-Wei , LI Zhan-Kui , XIE Yuan-Xiang , WU Zhe-Ying , XU Fu-Rong , GUO Bin , LENG Chang-Geng , WANG Chun-Fang , YU Yong . β-Delayed Proton Decay of ⁹³Pd. Chinese Physics C, 2003, 27(4): 309-312.
[11]	Xu Shuwei¹ , Li Zhankul¹ , Xie Yuanxiang¹ , Pan Qiangyan¹ , Yu Yong¹ , J.Adam² , Wang Chunfang¹ , king Jianping¹ , Hu Qingyuan¹ , Li Shihong¹ , Chen Hongyan¹ , Zhang Tianmei¹ , Jin Genming<sup . Six New Nuclides Near the Proton-drip Line in the Rare-earth Region. Chinese Physics C, 1999, 23(6): 589-593.
[12]	Zhang Xueqian , Yuan Shuanggui , Yang Weifan , Li Zongwei , Mou Wantong , Yu Xian , Luo Yixiao , Guo Tianrui . Internal Conversion Effect Applications in Identifying New Neutron-Rich Nuclides in the Rare-Earth Region. Chinese Physics C, 1997, 21(3): 201-204.
[13]	Xie Yuanxiang , Xu Shuwei , Li Zhankui , Ma Ruichang , Ge Yuanxiu , Wang Chunfang , Huang Wenxue , Zhang Tianmei . Synthesis and Study of the New β-delayed Proton Precursor Ce in the Region of Proton-drip Line. Chinese Physics C, 1997, 21(7): 668-671.
[14]	Guo Junsheng , Gan Zaiguo , Liu Hongye , Shi Lijun , Yang Weifan , Mou Wantong , Guo Tianrui , Fang Keming , Shen Shuifa , Yuan Shuanggui , Zhong Jiquan , Zhang Xueqian , Qin Zhi , Ma Ruichang , Wang Shuhong , Kong Dengming , Qiao Jimin . Synthesis and Identification of the New Transuranium Neutron-deficient Isotope ²³⁵Am. Chinese Physics C, 1996, 20(3): 286-288.
[15]	Xu Xiaoji , Ma Ruichang , Huang Wenxue , Hu Zhiqiang , Guo Junsheng , Guo Yingxiang , Xu Lianlian , Liu Hongye , Luo Yixiao , Wang Shuhong , Kong Dengming , Qiao Jimin . First Observation of β-delayed Proton Decay of the Proton Drip Line Nuclide ¹⁹Na. Chinese Physics C, 1995, 19(3): 203-208.
[16]	YANG Weifan , ZHAO Zhizheng , LI Zongwei , MOU Wantong , ZHU Shaofei , XIE Xiujun , YUAN Suanggui , ZHANG Tianmei , PAN Qiangyan , WANG Jicheng , XU Shuwei . New Gamma Rays from the Neutron-Rich Isotope ¹⁸⁹W Decay. Chinese Physics C, 1993, 17(11): 1055-1056.
[17]	XU Xiao-Ji , QU Xiu-Lan , CHENG Yuan . The Prediction of Proton Decay for Neutron Deficient Nuclei with A<70. Chinese Physics C, 1991, 15(7): 630-646.
[18]	XI Jin-Hua , SUN Hong-Zhou . THE APPLICATION OF IBM AND IBFM IN RARE EARTH REGION. Chinese Physics C, 1990, 14(3): 258-265.
[19]	ZHOU Zong-Yuan . HALF-LIFE MEASUREMENT OF THE β-DELAYED TWO-PROTON DECAY NUCLIDE ²⁶P. Chinese Physics C, 1988, 12(2): 246-251.
[20]	ZHANG Jing-Ye , ZHONG Ji-Quan , LI Bao-An , ZHANG Mong-Zhong . THE PROTON AND NEUTRON SUBSHELLS AND THE INTERPLAY BETWEEN THEM (Ⅱ) RARE EARTH REGION. Chinese Physics C, 1986, 10(1): 92-97.

Access

Get Citation

XU Shu-Wei, LI Zhan-Kui, XIE Yuan-Xiang, YU Yong, PAN Qiang-Yan, WANG Chun-Fang, XING Jian-Ping, MA Rui-Chang, CE Yuan-Xiu and WANG Xu-Dong. Nen β-Delayed Proton Decays in the Rare-Enrth Region Near the Proton Drip Line[J]. Chinese Physics C, 2000, 24(S1): 73-80.

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1900-01-01
Revised: 1900-01-01

Article Metric

Article Views(2870)
PDF Downloads(574)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Nen β-Delayed Proton Decays in the Rare-Enrth Region Near the Proton Drip Line

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

Nen β-Delayed Proton Decays in the Rare-Enrth Region Near the Proton Drip Line

Corresponding author: XU Shu-Wei,

HTML

目录