β-decay half-lives of new neutron-rich isotopes of elements from Pm to Tb

S Ichikawa,M Shibata,Y Oura,Y Nagame,Y Kojima,M Asai,K Kawade,M Sakama,I Nishinaka,A Osa,K Tsukada

doi:10.1063/1.1301749

β-decay half-lives of new neutron-rich isotopes of elements from Pm to Tb

S Ichikawa, M Shibata + Show 9 more

https://doi.org/10.1063/1.1301749

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Publication Date: Jan 1, 1999

Affiliation: Japan Atomic Energy Agency, Nagoya University, Tokyo Metropolitan University, Hiroshima University

#Proton-induced Fission Of 238U #Experimental Half-lives + Show 8 more

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Abstract

Eight new neutron-rich lanthanide isotopes produced in the proton-induced fission of 238U have been identified using the JAERI on-line isotope separator (JAERI-ISOL) coupled to a gas-jet transport system. For six of these, each half-life was determined: 159Pm (2±1 s), 161Sm (4.8±0.8 s), 165Gd (10.3±1.6 s), 166Tb (21±6 s), 167Tb (19.4±2.7 s) and 168Tb (8.2±1.3 s). The observed half-lives were compared with theoretical calculations. The recent calculation by the gross theory with the new one-particle strength function shows quite good agreement with the experimental half-lives.

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