Chinese Physics C > 1999, Vol. 23 > Issue(11): 1044-1048

Identification of New Isotope²³⁸Th

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000

Abstract
HTML
Reference
Related

PDF

Abstract：

Unreported heavy neutron-rich nuclide²³⁸Th has been produced via a multinucleon transfer reaction by 60MeVIu¹⁸0 ions bombardment of natural uranium.Thorium was radiochemically separated from the mixture of uranium and reaction products.²³⁸Pa as a daughter nucleus of²³⁸Th has been identified according to the growth and decay of²³⁸Pa γ rays which has been observed. The half-life of²³⁸Th was determined to be (9.4 + 2.0) min. At the same time, a new γ ray of (89.0 + 0.3) keV with T_1/2= (8.9 + 1.5)min was found in the γ spectrum gated with the K_α1, X ray of Pa and assigned to²³⁸Th decay based on the measurements of its transition energy and the half-life.

References

[1]

Rohozinski S G. Rep. Prog. Phys., 1989, 51:5412 Berlovich E Y et al. Phys. Lett., 1969, B29: 1553 Yang Chengzhong. Chinese Jour Trends in Nucl. Phys., 1985, 1:14 Loveland W et al. Nucl. Phys., 1987, A471 (1,2): 175c5 Daniel Guerreau et al. Nucl. Phys., 1986, A447:37c6 Mcgaughey P L et al. Phys. Rev., 1985, C31(3):8967 Zhang Li et al. Phys. Rev., 1994, C49(2): 5928 Zhang Li et al. High Energy Physics and Nuclear Physics (in Chinese), 1992, 16:767-768(张立等 .高能物理与核物理, 1992,16: 767-768)9 Yuan Shuanggui et al. Z. Phys., 1995, A352(3):23510 Yang Weifan et al. High Energy Physics and Nuclear Physics (in Chinese), 1995, 19:479-480(杨维凡等, 高能理物理与核物理，1995,19: 479-480)11 Yuan Shuanggui et al. Phys. Rev., 1998, C57: 1506-150712 He Jianjun et al. High Energy Physics and Nuclear Physics (in Chnese), 1997, 21:958-959(杨维凡等, 高能理物理与核物理,1997， 21: 958-959)13 Zhang Li et al. Eur. Phys. J., 1998, A2:514 Richard B Hrestone. Table of Isotopes, 8th Edition, 1996, 2:278015 Staudt A et al. At Data and Nucl. Data Tables, 1990, 44:7916 Klapdor H V et al. At. Data Nucl. Data Tables, 1984, 31: 8117 Takayoshi Horiguchi et al. Chart of the Nuclides 1996

[1]	SUN Xiao-Jun,YU Cheng-Gang,WANG Ning,YANG Yong-Xu,PAN Cheng-Hua. Pre-neutron-emission mass distributions for reaction²³⁸U(n, f) up to 60 MeV. Chinese Physics C, 2015, 39(1): 014102.doi:10.1088/1674-1137/39/1/014102
[2]	ZHENG Na,ZHONG Chun-Lai,FAN Tie-Shuan. Multi-modal calculations of prompt fission neutrons from²³⁸U(n, f) at low induced energy. Chinese Physics C, 2011, 35(10): 930-934.doi:10.1088/1674-1137/35/10/008
[3]	WU Xi-Zhen,TIAN Jun-Long,ZHAO Kai,ZHANG Ying-Xun,LI Zhu-Xia. Study on the formation of the composite system of²³⁸U+²³⁸U. Chinese Physics C, 2009, 33(S1): 30-32.doi:10.1088/1674-1137/33/S1/010
[4]	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.
[5]	YU Hong-Wei,CAI Cong-Hai,ZHAO Zhi-Xiang. Theoretical Calculations for p+²³⁸U Reactions. Chinese Physics C, 2005, 29(3): 263-267.
[6]	XU Shu-Wei,XIE Yuan-Xiang,LI Zhan-Kui,WANG Xu-Dong. New Nuclide¹²⁹Pm Near the Proton Drip Line. Chinese Physics C, 2004, 28(2): 158-160.
[7]	HAN Yin-Lu. Theoretical Analysis of Double Differential Cross Sections for n+²³⁸U Reaction. Chinese Physics C, 2004, 28(2): 177-180.
[8]	REN Zhong-Zhou. Theoretical Study on the Properties of New Nuclide²⁷¹110 and Its Alpha-Decay Chain. Chinese Physics C, 2002, 26(10): 1046-1049.
[9]	Li Panlin,Deng Chengfeng,Wang Lilian,Xu Mengjie. Calculation of the Productive Dilepton Spectrum (M≤4GeV/c²) in²³⁸U+²³⁸U Collisions at E_c,m≈200GeV/u. Chinese Physics C, 1999, 23(7): 693-700.
[10]	Xu Yanbing,Yuan Shuanggui,Yang Weifan,He Jianjun,Li Zongwei,Ma Taotao,Xiong Bing,Qin Zhi,Mou Wantong,Gan Zaiguo,Shi Lijun,Guo Tianrui,Chen Zhantu,Guo Junsheng. A New Heavy Neutron-rich Isotope²³⁸Th. Chinese Physics C, 1999, 23(1): 93-95.
[11]	Zhao Jinhua,Zhang Li,Zheng Jiwen,Wang Jicheng,Qin Zhi,Yang Yongfeng,Zhang Chun,Jin Genming,Guo Guanghui,Du Yifei,Guo Tianrui,Wang Tongqing,Guo Bin,Tan Jinfeng. New Heavy Neutron-Rich Nuclide²⁰⁹Hg. Chinese Physics C, 1998, 22(10): 959-960.
[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]	Huang Wenxue,Xu Xiaoji,Hu Zhiqiang,Ma Ruichang. First Experimental Determination of Half-Life for New Nuclide⁶⁵Se. Chinese Physics C, 1996, 20(2): 113-118.
[14]	YUAN Shuang-Gui,ZHANG Tian-Mei,XU Shu-Wei,LI Zong-Wei,PAN Qiang-Yan,ZHAO Zhi-Zheng,YANG Wei-Fan,ZHANG Xue-Qian,LI Wei-Sheng,YIN Xi-Jin,DU Yi-Fei,WANG Yi-Hao. The Synthesis and Identification of New Neutron-Rich Heavy Nuclide²³⁷Th. Chinese Physics C, 1993, 17(10): 959-960.
[15]	DAI Guang-Xi,QI Yu-Jin,ZHENG Ji-Wen,LIU Xi-Ming,,. INCOMPLETE AND SEQUENTIAL FISSION IN²⁸Si+²³⁸U SYSTEMS. Chinese Physics C, 1990, 14(10): 912-918.
[16]	CUI Huan-Hua,KE Wei,ZHOU Jian,LV Wei-Chun. STUDY ON THE INTERACTION OF 960A MeV²³⁸U IONS WITH LIGHT NUCLEI. Chinese Physics C, 1989, 13(3): 199-204.
[17]	XU Xiao-Ji. THE POSSIBILITY OF EXITENCE OF NEW ISOTOPE⁶⁵Se. Chinese Physics C, 1989, 13(2): 156-163.
[18]	SHEN Wen-Qing. SIMULATION OF QCASI-FISSION INDUCED BY²³⁸U. Chinese Physics C, 1988, 12(2): 237-245.
[19]	DAI Guang-Xi,,,,,,,,,,,. THE SHELL EFFECT IN SEQUENTIAL FISSION INDUCED BY²³⁸U WITH ENERGY JUST ABOVE COULOMB BARRIER. Chinese Physics C, 1985, 9(4): 454-460.
[20]	KANG Tie-Sheng,ZHAI Peng-Ji. INVESTIGATION OF THE²³⁸U ION TRACKS REGISTERD IN POLYCARBONATE CHAOYANG NO.1. Chinese Physics C, 1984, 8(3): 380-384.

Access

Get Citation

He Jianjun, Yang Weifan, Yuan Shuanggui, Ma Taotao, Li Zongwei, Xiong Bing and Xu Yanbing. Identification of New Isotope ²³⁸Th[J]. Chinese Physics C, 1999, 23(11): 1044-1048.

He Jianjun, Yang Weifan, Yuan Shuanggui, Ma Taotao, Li Zongwei, Xiong Bing and Xu Yanbing. Identification of New Isotope ²³⁸Th[J]. Chinese Physics C, 1999, 23(11): 1044-1048. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1999-09-16
Revised: 1900-01-01

Article Metric

Article Views(4090)
PDF Downloads(1205)
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

Identification of New Isotope²³⁸Th

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000

Received Date:1999-09-16

Accepted Date:1900-01-01

Available Online:1999-11-05

Abstract:

Unreported heavy neutron-rich nuclide²³⁸Th has been produced via a multinucleon transfer reaction by 60MeVIu¹⁸0 ions bombardment of natural uranium.Thorium was radiochemically separated from the mixture of uranium and reaction products.²³⁸Pa as a daughter nucleus of²³⁸Th has been identified according to the growth and decay of²³⁸Pa γ rays which has been observed. The half-life of²³⁸Th was determined to be (9.4 + 2.0) min. At the same time, a new γ ray of (89.0 + 0.3) keV with T_1/2= (8.9 + 1.5)min was found in the γ spectrum gated with the K_α1, X ray of Pa and assigned to²³⁸Th decay based on the measurements of its transition energy and the half-life.

HTML

Reference (1)

Identification of New Isotope²³⁸Th

Abstract：

References

Access

Article Metrics

Metrics

通讯作者:陈斌, bchen63@163.com

Email This Article