Identification of 161Sm and 165Gd

S. Ichikawa, K. Tsukada, I. Nishinaka, Y. Hatsukawa, H. Iimura, K. Hata, Y. Nagame, A. Osa, M. Asai, Y. Kojima, T. Hirose, M. Shibata, K. Kawade, and Y. Oura
Phys. Rev. C 58, 1329 – Published 1 August 1998
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Abstract

Two new neutron-rich rare-earth isotopes 161Sm and 165Gd 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 system. The half-lives were determined to be 4.8±0.8 s for 161Sm and 10.3±1.6 s for 165Gd. The assignment of these isotopes was based upon the observation of Eu and Tb K x rays in the β-gated x/γ-ray spectra measured for the separated mass fraction 177 and 181 as monoxide ions 161Sm16O+ and 165Gd16O+, respectively.

  • Received 17 March 1998

DOI:https://doi.org/10.1103/PhysRevC.58.1329

©1998 American Physical Society

Authors & Affiliations

S. Ichikawa*, K. Tsukada, I. Nishinaka, Y. Hatsukawa, H. Iimura, K. Hata, and Y. Nagame

  • Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319-1195, Japan

A. Osa

  • Japan Atomic Energy Research Institute, Takasaki 370-1292, Japan

M. Asai, Y. Kojima, T. Hirose, M. Shibata, and K. Kawade

  • Department of Energy Engineering and Science, Nagoya University, Nagoya 464-8603, Japan

Y. Oura

  • Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0364, Japan

  • *Electronic address: sichi@popsvr.tokai.jaeri.go.jp

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Vol. 58, Iss. 2 — August 1998

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