Identification of the New Isotope 265107Bh by α Correlated Decay Chains

FAN Hong-Mei; WU Xiao-Lei; GUO Jun-Shen; GAN Zai-Guo; QIN Zhi; LEI Xiang-Guo; DONG Cheng-Fu; XU Hua-Gen; CHEN Ruo-Fu; ZHANG Fu-Ming; GUO Bin; LIU Hong-Ye; WANG Hua-Lei

Chinese Physics C> 2005, Vol. 29> Issue(5) : 451-455

Identification of the New Isotope 265107Bh by α Correlated Decay Chains

Institute of Modern Physics,CAS,Lanzhou 730000,China2 Lan Zhou University,LanZhou 730000,China3 Department of Physics, Nanjing University,Nanjing 210008,China

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The experimental set-up, methods and results on the synthesis and identification of the new isotope 265 107Bh are presented in this paper. The new isotope was produced by the complete fusion-evaporation reaction of 243Am with 168MeV 26Mg at the Sector Focus Cyclotron of Heavy Ion Research Facility Lanzhou. The reaction products were transported and collected using helium-jet technique and a set of rotating wheel system. The identification of the new isotope was made by observing of correlated a-particle decays chain between the new isotope 265Bh and its 261Db and 257Lr daughters. A total of 8 correlated decay events of 265Bh and 4 decay events of 264Bh were observed. The new nuclide 265Bh has a half-life of 0.94+0.70 -0.31s and decays by alpha-particle emission with decay energy of Ea=(9.24±0.05)MeV. The half-life and a decay energy of 265Bh from this experiment are consistent with theoretical predictions.

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[1]

.GAN Zai-Guo,QIN Zhi,FAN Hong-Mei et al.Eur.Phys.J.,2001,A10:21—252.GAN Zai-Guo,FAN Hong-Mei,QIN Zhi et al.High Energy Physics and Nuclear Physics,2004,28 (4):332—334 (in Chinese)(甘再国,范红梅,秦芝等.高能物理与核物理,2004,28(4):332—334)3.Münzenberg G,Hofmann S,Heβberger F P et al.Z.Phys.,1981,A300:107—1084.Wilk P A,Gregorich K E,Tüler A et al.Phys.Rev.Lett.,2000,85:26975.Oganessian Yu Ts,Utyonkoy V K,Lobanov Yu V et al.Phys.Rev.,2004,C69:0216016.GAN Zai-Guo,GUO Jun-Sheng,QIN Zhi et al.Nuclear Physics Re-view,2003,20(2):99—101 (in Chinese)(甘再国,郭俊盛,秦芝等.原子核物理评论,2003,20 (2):99 —101)7.Gregorich K E.Nucl.Instrum.Methods Phys.Res.,1991,A302:1358.Firestone R B,Shirley V S,Baglin CMet al.Table of Isotopes (Eighth Edition),New York:LBL,University of California,19969.Wapstra A H,Audi G.Nucl.Phys.,1985,A432:5510.Mê ller P,Nix J R,Kratz KL.Atom.Data Nucl.Data Tables,1997,66:13111.REN Zhong-Zhou,CHEN Ding-Han,TAI Fei et al.Phys.Rev.2003,C67:06430212.Hofmann S,Hessberger F P,Ackermann D et al.Eur.Phys.J.,2002,A14:147

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[2]	FENG Zhao-Qing , JIN Gen-Ming , FU Fen , LI Jun-Qing . Isotopic Dependence of Production Cross Sections of Superheavy Nuclei in Hot Fusion Reactions. Chinese Physics C, 2007, 31(4): 366-370.
[3]	WANG Pei-Wei , CHEN Hong , LI Jia-Xing , LIU Lang , MENG Jie . Properties of C Isotopes in RMF+SLAP Approach. Chinese Physics C, 2006, 30(S2): 94-96.
[4]	ZHONG Xian-Hui , LI Lei , ZHANG Xiao-Bing , NING Ping-Zhi . Study for the Relativistic Mean-Field of A～50 Isotopes. Chinese Physics C, 2003, 27(7): 598-602.
[5]	YE Wei . Isotopic Effects in Prescission Particle Emission. Chinese Physics C, 2003, 27(3): 233-237.
[6]	ZHONG Xian-Hui , TAN Yu-Hong , NING Ping-Zhi . Shell Anomalies of Mg, Si and S Isotopes. Chinese Physics C, 2003, 27(9): 794-797.
[7]	LONG Wen-Hui , MENG Jie , ZHOU Shan-Gui . Description of the New Nuclide ²⁵⁹Db and Its α-Decay Chain in Relativistic Mean Field Theory. Chinese Physics C, 2002, 26(8): 823-830.
[8]	XU Yan-Bing , YANG Wei-Fan , YUAN Shuang-Gui , XIAO Yong-Hou , PAN Qiang-Yan , LI Ying-Jun . Measurement of the Cross Sections for Ba Isotopes. Chinese Physics C, 2002, 26(6): 589-593.
[9]	FAN Hong-Mei , GAN Zai-Guo , QIN Zhi , LEI Xiang-Guo , XU Yan-Bing , HE Jian-Jun , LIU Hong-Ye , WU Xiao-Lei , GUO Jun-Sheng , ZHOU Xiao-Hong , YUAN Shuang-Gui , JIN Gen-Ming . A New Isotope of Z=105 with Mass Number 259. Chinese Physics C, 2001, 25(6): 602-606.
[10]	ZHOU Yong , LI JunQing , MA ZhongYu , CHEN BaoQiu . Drip-Line Nucleus of Z=59 Nuclei in the Relativistic Mean-Field Theory. Chinese Physics C, 2000, 24(10): 940-944.
[11]	ZHOU Yong , LI JunQing , MA ZhongYu , CHEN BaoQiu . Ground-State Properties of Z=59 Isotopic Chain in the Relativistic Mean-Field Theory. Chinese Physics C, 2000, 24(8): 748-754.
[12]	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 Isotope ²³⁸Th. Chinese Physics C, 1999, 23(1): 93-95.
[13]	He Jianjun , Yuan Shuanggui , Yang Weifan , Li Zongwei , Ma Taotao , Fang Keging , Shen Shuifa , Gan Zaiguo , Pan Qiangyan , Chen Zhantu , Guo Tianrui , Mou Wantong , Su Denggui , Xu Yanbing , Guo Junsheng , Liu Hongye , Shi Li Lijun , Zhao Zhizheng , Ma Huifang . A New Isotope of Hafnium: ¹⁸⁶Hf. Chinese Physics C, 1998, 22(12): 1057-1060.
[14]	Zhang Li , Wang Jicheng , Zhao Jinhua , Yang Yongfeng , Zheng Jiwen , Qin Zhi , Zhang Chun , Guo Tianrui . Detection of Weak γ-Activities of Neutron-Rich Isotopesin Element-Separated Sample. Chinese Physics C, 1997, 21(10): 891-896.
[15]	Yang Weifan , Yuan Shuanggui , Li Zongwei , He Jianjun , Ma Taotao , Fang Keming , Shen Shuifa , Gan Zaiguo , Pan Qiangyan , Mou Wantong , Su Denggui , Chen Zhantu , Guo Tianrui , Guo Junsheng , Liu Hongye , Shi Lijun , Zhao Zhizheng , Ma Huifang . A New Neu tron-rich Isotope:¹⁸⁶Hf. Chinese Physics C, 1997, 21(10): 958-959.
[16]	Xu Shuwei , Xie Yuanxiang , Pan Qiangyan , Zhang Juping , Zhang Xueqian , Wang Yihao , Ge Yuanxiu , Yin Xijin , Wang Chunfang , Zhang Tianmei , Liu Zhong , Guo Bing , Luo Yixiao , Xing Zheng , Chen Xingqu . First Study of EC/β⁺ Decay Schemes for Neutron-Deficient Isotopes ¹⁵³Er and ¹⁵⁷Yb. Chinese Physics C, 1995, 19(3): 193-202.
[17]	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.
[18]	WEN Wan-Xin , GU Jin-Nan . Mixed Symmetry States in Gd Isotopes. Chinese Physics C, 1992, 16(4): 379-384.
[19]	ZHANG Li , JIN Gen-Ming , ZHAO Jin-Hua , YANG Wei-Fan , YANG Yong-Feng , ZHAO Zhi-Zheng , ZHENG Ji-Wen , SUN Xiu-Rong , LI Zong-Wei , QIN Zhi , WANG Ji-Cheng , GUO Guang-Hui . New Neutron-Rich Isotope ²⁰⁸Hg. Chinese Physics C, 1992, 16(8): 767-768.
[20]	ZHANG Jing-Ye , ZHONG Ji-Quan , JIAO Dun-Pang , GE Yuan-Xiu , MA Xi-Liang . ON THE νi_13/2PAIR IN EVEN Pt ISOTOPES. Chinese Physics C, 1987, 11(1): 128-132.

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FAN Hong-Mei, WU Xiao-Lei, GUO Jun-Shen, GAN Zai-Guo, QIN Zhi, LEI Xiang-Guo, DONG Cheng-Fu, XU Hua-Gen, CHEN Ruo-Fu, ZHANG Fu-Ming, GUO Bin, LIU Hong-Ye, WANG Hua-Lei, Identification of the New Isotope 265107Bh by α Correlated Decay Chains[J]. Chinese Physics C, 2005, 29(5): 451-455.

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Received: 2004-10-29
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Identification of the New Isotope 265107Bh by α Correlated Decay Chains

Corresponding author: FAN Hong-Mei,

Institute of Modern Physics,CAS,Lanzhou 730000,China2 Lan Zhou University,LanZhou 730000,China3 Department of Physics, Nanjing University,Nanjing 210008,China

Received Date: 2004-10-29

Accepted Date: 1900-01-01

Available Online: 2005-05-05

Abstract: The experimental set-up, methods and results on the synthesis and identification of the new isotope 265 107Bh are presented in this paper. The new isotope was produced by the complete fusion-evaporation reaction of 243Am with 168MeV 26Mg at the Sector Focus Cyclotron of Heavy Ion Research Facility Lanzhou. The reaction products were transported and collected using helium-jet technique and a set of rotating wheel system. The identification of the new isotope was made by observing of correlated a-particle decays chain between the new isotope 265Bh and its 261Db and 257Lr daughters. A total of 8 correlated decay events of 265Bh and 4 decay events of 264Bh were observed. The new nuclide 265Bh has a half-life of 0.94+0.70 -0.31s and decays by alpha-particle emission with decay energy of Ea=(9.24±0.05)MeV. The half-life and a decay energy of 265Bh from this experiment are consistent with theoretical predictions.

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Identification of the New Isotope 265107Bh by α Correlated Decay Chains

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