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$$beta$$-decay half-lives of new neutron-rich rare-earth isotopes $$^{159}$$Pm, $$^{162}$$Sm, and $$^{166}$$Gd

Ichikawa, Shinichi; Asai, Masato  ; Tsukada, Kazuaki  ; Haba, Hiromitsu*; Nagame, Yuichiro ; Shibata, Michihiro*; Sakama, Minoru*; Kojima, Yasuaki*

The new neutron-rich raer-earth isotopes $$^{159}$$Pm, $$^{162}$$Sm, and $$^{166}$$Gd produced in the proton-induced fission of 238U were identified using the JAERI on-line isotope separator (JAERI-ISOL) coupled to a gas-jet transport sysetm. The half-lives of $$^{159}$$Pm, $$^{162}$$Sm, and $$^{166}$$Gd were determined to be 1.5$$pm$$0.2s, 2.4$$pm$$0.5s, and 4.8$$pm$$1.0s, respectively. The partial decay scheme of $$^{166}$$Gd wes constructed for $$gamma$$-$$gamma$$ coincidence data. The improved half-life values of 25.6$$pm$$2.2s wes obtained for the previously identified isotope $$^{166}$$Tb. The half-lives measured in the present study are in good agreement with the theoretical predictions calculated by the second generation of the gross theory with the atomic masses evaluated by the Audei and Wapstra.

Language

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English

Journal

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Physical Review C

Volume

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71

Number

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6

Pages

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p.067302_1 - 067302_4

Publication Year/Month

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2005/06

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Held date

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Patent information

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Paper URL

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https://doi.org/10.1103/PhysRevC.71.067302

DOI for research data

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Keywords

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New Isotope; 159Pm; 162Sm; 166Gd; Half-life; Decay Scheme

Research Facility

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タンデム加速器  

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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広島大学; 名古屋大学

Accesses

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- Accesses

InCites™

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Percentile:74.03

Category:Physics, Nuclear

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