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Title:
α decay of a new isotope 209Th
Authors:
Ikezoe, H.; Ikuta, T.; Hamada, S.; Nagame, Y.; Nishinaka, I.; Tsukada, K.; Oura, Y.; Ohtsuki, T.
Affiliation:
AA(Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken, 319-11 Japan), AB(Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken, 319-11 Japan), AC(Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken, 319-11 Japan), AD(Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken, 319-11 Japan), AE(Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken, 319-11 Japan), AF(Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken, 319-11 Japan), AG(Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken, 319-11 Japan), AH(Laboratory of Nuclear Science, Tohoku University, Taihaku-ku, Sendai 982, Japan)
Publication:
Physical Review C (Nuclear Physics), Volume 54, Issue 4, October 1996, pp.2043-2046 (PhRvC Homepage)
Publication Date:
10/1996
Origin:
AIP; APS
PACS Keywords:
Alpha decay, Lifetimes, Compound nucleus, 190<, =A<, =219
DOI:
10.1103/PhysRevC.54.2043
Bibliographic Code:
1996PhRvC..54.2043I

Abstract

The new neutron deficient isotope 209Th has been produced in the reaction of 32S on 182W at beam energy of 171 MeV. Evaporation residues were separated in flight from beam by a JAERI recoil mass separator, and implanted in a position sensitive strip detector. The genetic correlation of α-decay events, their energies and half-lives has been used to identify isotopes. An α-decay energy and a half-life of 209Th have been determined to be 8.080(50) MeV and 3.8+6.9-1.5 ms, respectively.
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