Six New Nuclides Near the Proton-drip Line in the Rare-earth Region

Xu Shuwei<SUP>1</SUP>; Li Zhankul<SUP>1</SUP>; Xie Yuanxiang<SUP>1</SUP>; Pan Qiangyan<SUP>1</SUP>; Yu Yong<SUP>1</SUP>; J.Adam<SUP>2</SUP>; Wang Chunfang<SUP>1</SUP>; king Jianping<SUP>1</SUP>; Hu Qingyuan<SUP>1</SUP>; Li Shihong<SUP>1</SUP>; Chen Hongyan<SUP>1</SUP>; Zhang Tianmei<SUP>1</SUP>; Jin Genming&lt;sup

Chinese Physics C> 1999, Vol. 23> Issue(6) : 589-593

Six New Nuclides Near the Proton-drip Line in the Rare-earth Region

Institute of Modern Physics, The Chinese Academy of Science, Lanzhou 7300002 Flerov Laboratory of Nuclear Reactions, JINn Dubna, Russia

Abstract
HTML
Reference
Related

PDF

Abstract：
Unknown isotopes ¹²⁵Nd,¹²⁸Pm,¹²⁹Sm, ¹³⁷Gd,¹³⁹Dy and ¹³⁹Tb were produced using enriched targets ⁹²Mo,⁹⁶Ru and ¹⁰⁶Cd, respectively, bombarded by ³⁶Ar ion beam with the energies of 165-180MeV from the SFC cyclotron of HIRFL. The six new nuclides were separated and identified by a He-jet combined with a fast-tape transport system as well as "p-γ" and "X-γ" coincidence measurements. Their half-lives were determined to be (0.60±0.15)s, (1.0±0.3)s, (0.55±0.10)s,(2.2±0.2)s, (0.6±0.2)s and (l.6±0.2)s, respectively. Energy spectra of β-delayed protons from ¹²⁵Nd,¹²⁸Pm,¹²⁹Sm,¹³⁷Gd and ¹³⁹Dy decay were measured. Two γ-rays with the energies of 109.0 keV and 119.7 keV were assigned tO EC/β⁺ decay of ¹³⁹Tb.

References

[1]

Nitschke J M, Cable M D, Zeite W D. Z. Phys., 1983, A312:256 2 Hofmann S. Proc. Int. Conf. on the Future of Nuclear Spectroscopy, Crete, Greece, 1993, 255 3 Larsson P O, Batisch T, Kirehner R et al. Z.Phys., 1983, A314: 9 4 Livingston K Woods P J, Davis N J et al. Phys. Rev., 1993, C48: 31135 Beraud R, Emsallem A, Arie J et al. Third INPP3–RIKEN Symposium on Heavy Ion Collisions, 1994, 102;Workshop IGISOL–6, Dubna, Russia, 1997, 596 Xu Shuwei, Xie Yuanxiang, Li Zhankui et al. Science in China (in Chinese), 1997, A27:434(徐树威, 谢元祥, 李占奎等. 中国科学, 1997, A27: 434) 7 Xu Shuwei, Xie Yuanxiang, Li Zhankui et al. Z. Phys., 1996, A356:2278 Li Zhankui, Xu Shuwei, Xie Yuanixiang et al. Phys. kiev., 1997, C56: 1157 9 Iimura fi Katakura J, Kjtao K et al. Nucl. Data Sheets, 1997, 80: 1062 10 Horiguchi T, Tachibana T, Katakura J. Chart of the Nuclides, 199611 Hirsh M, Staudt A, Muto K et al. Atomic Data and Nuclear Data Tables, 1993, 53: 165

[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]	LIU Zu-Hua , BAO Jing-Dong . Synthesis and Decay of Superheavy Nuclei in the Deformed Region. Chinese Physics C, 2006, 30(S2): 118-120.
[3]	YAO You-Kun , PAN Feng , LUO Yan-An , LIU Hai-Yan , XIE Ming-Xia . Description of Rare-Earth and Actinide Nuclei in the Nilsson Mean-Field Plus Nearest-Orbit Pairing Interaction Model. Chinese Physics C, 2006, 30(S2): 56-58.
[4]	DING Bin-Gang , ZHANG Da-Li , LU Ding-Hui . A study of the pairing strength in the rare-earth nuclei. Chinese Physics C, 2006, 30(7): 616-619.
[5]	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.
[6]	TAI Fei , CHEN Ding-Han , XU Chang , REN Zhong-Zhou . Description of New Element Z=113 and Its α-Decay Chain. Chinese Physics C, 2005, 29(5): 439-441.
[7]	LI Jia-Xing , LI Chen , GUO Zhong-Yan , XIAO Guo-Qing , ZHAN Wenlong , WANG Jian-Song , SUN Zhi-Yu , WANG Meng , CHEN Li-Xin , MAO Rui-Shi , HU Zheng-Guo . Measurement of Total Reaction Cross Section of the Proton Drip-line Nucleus 17Ne on Si Target. Chinese Physics C, 2005, 29(1): 28-31.
[8]	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.
[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]	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.
[11]	WU Yue-Wei , LIU Zu-Hua , LIN Cheng-Jian , ZHANG Huan-Qiao , RUAN Ming , YANG Feng , Ll Zhi-Chang , LIU Jian-Cheng . Measurement of Near-Barrier Fusion Excitation Function of ⁶Li+²⁰⁸Pb. Chinese Physics C, 2003, 27(5): 399-401.
[12]	REN Zhong-Zhou . Theoretical Study on the Properties of New Nuclide ²⁷¹110 and Its Alpha-Decay Chain. Chinese Physics C, 2002, 26(10): 1046-1049.
[13]	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 . Nen β-Delayed Proton Decays in the Rare-Enrth Region Near the Proton Drip Line. Chinese Physics C, 2000, 24(S1): 73-80.
[14]	Ding Linkal , Zhu Qingqi , Shen Changquan , Yao Zhiguo , Cheung Tsang , Matti Vallinkoski . An Approach to Study the Cosmic Ray ‘Knee’Composition From Underground Multimuon Events at a Shallower Depth. Chinese Physics C, 1999, 23(6): 584-588.
[15]	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.
[16]	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.
[17]	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.
[18]	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.
[19]	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.
[20]	SUN Luo-Rui . A SYUDY OF ENERGY SPECTRUM OF COSMIC RAYS RANGING FROM 6×10¹⁴ TO 5×10¹⁶eV. Chinese Physics C, 1984, 8(4): 502-507.

Access

Get Citation

Xu Shuwei¹, Li Zhankul¹, Xie Yuanxiang¹, Pan Qiangyan¹, Yu Yong¹, J.Adam², Wang Chunfang¹, king Jianping¹, Hu Qingyuan¹, Li Shihong¹, Chen Hongyan¹, Zhang Tianmei¹ and Jin Genming<sup. Six New Nuclides Near the Proton-drip Line in the Rare-earth Region[J]. Chinese Physics C, 1999, 23(6): 589-593.

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1999-03-12
Revised: 1900-01-01

Article Metric

Article Views(2618)
PDF Downloads(582)
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

Six New Nuclides Near the Proton-drip Line in the Rare-earth Region

Corresponding author: Xu Shuwei¹,

Institute of Modern Physics, The Chinese Academy of Science, Lanzhou 7300002 Flerov Laboratory of Nuclear Reactions, JINn Dubna, Russia

Received Date: 1999-03-12

Accepted Date: 1900-01-01

Available Online: 1999-06-05

Abstract: Unknown isotopes ¹²⁵Nd,¹²⁸Pm,¹²⁹Sm, ¹³⁷Gd,¹³⁹Dy and ¹³⁹Tb were produced using enriched targets ⁹²Mo,⁹⁶Ru and ¹⁰⁶Cd, respectively, bombarded by ³⁶Ar ion beam with the energies of 165-180MeV from the SFC cyclotron of HIRFL. The six new nuclides were separated and identified by a He-jet combined with a fast-tape transport system as well as "p-γ" and "X-γ" coincidence measurements. Their half-lives were determined to be (0.60±0.15)s, (1.0±0.3)s, (0.55±0.10)s,(2.2±0.2)s, (0.6±0.2)s and (l.6±0.2)s, respectively. Energy spectra of β-delayed protons from ¹²⁵Nd,¹²⁸Pm,¹²⁹Sm,¹³⁷Gd and ¹³⁹Dy decay were measured. Two γ-rays with the energies of 109.0 keV and 119.7 keV were assigned tO EC/β⁺ decay of ¹³⁹Tb.

HTML

Reference (1)

Six New Nuclides Near the Proton-drip Line in the Rare-earth Region

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article