IDENTIFICATION OF A NEW ISOTOPE TB-166

Authors
ASAI M TSUKADA K ICHIKAWA S OSA A KOJIMA Y SHIBATA M YAMAMOTO H KAWADE K SHINOHARA N NAGAME Y IIMURA H HATSUKAWA Y NISHINAKA I
Citation
M. Asai et al., IDENTIFICATION OF A NEW ISOTOPE TB-166, Journal of the Physical Society of Japan, 65(5), 1996, pp. 1135-1138
Citations number
23
Categorie Soggetti
Physics
Journal title
Journal of the Physical Society of Japan → ACNP
ISSN journal
00319015
Volume
65
Issue
5
Year of publication
1996
Pages
1135 - 1138
Database
ISI
SICI code
0031-9015(1996)65:5<1135:IOANIT>2.0.ZU;2-P
Abstract
A new neutron-rich isotope Tb-166 produced in 16 MeV proton-induced fi ssion of U-238 has been identified using the JAERI on-line isotope sep arator (JAERI-ISOL) coupled to a gas-jet transport system. Dy KX-rays and gamma rays originating from the decay of Tb-166 were found in both mass-166 and 182 fractions, where the Tb-166 nuclides were mass-separ ated as elemental ions Tb-166(+) and monoxide ions (TbO+)-Tb-166, resp ectively. The half-life of Tb-166 has been determined as 21 +/- 6 s, w hich is much shorter than theoretical predictions. A decay scheme of T b-166 has been proposed and a probable spin assignment for the Tb-166 ground state has been discussed.