Chinese Physics C > 1992, Vol. 16 > Issue(8): 765-766

New Neutron-Rich Nuclide¹⁸⁵Hf

Institute of Modern Physics,Academia Sinica,Lanzhou 730000

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Abstract：
New neutron-rich nuclide ¹⁸⁵Hf has been identified for the first time.The ¹⁸⁵Hf was produced via the ¹⁸⁶W(n,2p) ¹⁸⁵Hf reaction by 14MeV neutron irradiation of natural metallic tungsten powder and separated by radiochemical methods.The identification of ¹⁸⁵Hf was based on the observation of decay γ-ray of its daughter ¹⁸⁵Ta.A half-life of 3.5±0.6min was determined for ¹⁸⁵Hf by fitting the measured growth and decay curve of the 177.59keV γ-ray which is the strongest decay γ-ray of ¹⁸⁵Ta.In addition,a new γ-ray of 164.5±0.5keV was found and assigned to ¹⁸⁵Hf.

References

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[4]	TU Ya,CHEN Yong-Shou,GAO Zao-Chun. γ Degree of Freedom for the¹⁷⁸Hf Isomeric State. Chinese Physics C, 2006, 30(S2): 109-111.
[5]	LI Xiao-Wei,YU Shao-Ying,SHEN Cai-Wan,CHEN Yong-Shou. Searching Triaxial Superdeformation in¹⁷⁵Hf. Chinese Physics C, 2006, 30(11): 1071-1073.
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[7]	AN Guang-Peng,YU Shao-Ying,SHEN Cai-Wan,CHEN Yong-Shou. Study of Triaxial Superdeformation in¹⁶⁸Hf. Chinese Physics C, 2006, 30(7): 625-627.
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[16]	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.
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YUAN Shuang-Gui, ZHANG Tian-Mei, PAN Qiang-Yan, ZHANG Xue-Qian and XU Shu-Wei. New Neutron-Rich Nuclide ¹⁸⁵Hf[J]. Chinese Physics C, 1992, 16(8): 765-766.

YUAN Shuang-Gui, ZHANG Tian-Mei, PAN Qiang-Yan, ZHANG Xue-Qian and XU Shu-Wei. New Neutron-Rich Nuclide ¹⁸⁵Hf[J]. Chinese Physics C, 1992, 16(8): 765-766. shu

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

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

New Neutron-Rich Nuclide¹⁸⁵Hf

Corresponding author:YUAN Shuang-Gui,

Institute of Modern Physics,Academia Sinica,Lanzhou 730000

Received Date:1900-01-01
Accepted Date:1900-01-01
Available Online:1992-08-05

Abstract:New neutron-rich nuclide¹⁸⁵Hf has been identified for the first time.The¹⁸⁵Hf was produced via the¹⁸⁶W(n,2p)¹⁸⁵Hf reaction by 14MeV neutron irradiation of natural metallic tungsten powder and separated by radiochemical methods.The identification of¹⁸⁵Hf was based on the observation of decay γ-ray of its daughter¹⁸⁵Ta.A half-life of 3.5±0.6min was determined for¹⁸⁵Hf by fitting the measured growth and decay curve of the 177.59keV γ-ray which is the strongest decay γ-ray of¹⁸⁵Ta.In addition,a new γ-ray of 164.5±0.5keV was found and assigned to¹⁸⁵Hf.