Beta decay half-lives of neutron rich Ti-Co isotopes around N=40

被引:40
|
作者
Sorlin, O
Donzaud, C
Axelsson, L
Belleguic, M
Béraud, R
Borcea, C
Canchel, G
Chanabat, E
Daugas, JM
Emsallem, A
Guillemaud-Mueller, D
Kratz, KL
Leenhardt, S
Lewitowicz, M
Longour, C
Lopez, MJ
Santos, FD
Petizon, L
Pfeiffer, B
Pougheon, F
Saint-Laurent, MG
Sauvestre, JE
机构
[1] Inst Phys Nucl, IN2P3, CNRS, F-91406 Orsay, France
[2] Chalmers Tekniska Hogskola, Inst Fys, S-41296 Gothenburg, Sweden
[3] Inst Phys Nucl, F-69622 Villeurbanne, France
[4] GANIL, F-14021 Caen, France
[5] IAP, Bucharest, Romania
[6] Univ Mainz, Inst Kernchem, D-55099 Mainz, Germany
[7] Univ Louis Pasteur Strasbourg 1, IReS Strasbourg, UMR 7500, F-67037 Strasbourg 2, France
[8] Ctr Etud Bruyeres Le Chatel, F-91680 Bruyeres Le Chatel, France
关键词
Ti57-59; V59-62; Cr61-64; Mn63-66; Fe65-67; Co67-70 (beta-) [from Ni-58(Kr-86; X); E=60.4; MeV/nucleon; measured E-gamma; beta-gamma-coinc; T-1/2; r-process implications;
D O I
10.1016/S0375-9474(99)00355-3
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
The neutron-rich Ti57-59, V59-62, Cr61-64, Mn63-66, Fe65-68, Co67-70 have been produced at GANIL via interactions of a 60.4 MeV/u (KR34+)-K-86 With a Ni-58 target. They have been separated by the doubly achromatic spectrometer LISE3. Beta-decay half-lives have been determined for all produced nuclei, and subsequent gamma-rays have been observed for the most efficiently produced nuclei. The measured half-lives of vanadium and chromium isotopes are compared to QRPA calculations using ground states deformations from the FRDM or ETFSI models. In an astrophysical context, the short half-lives of Ti-58 and Cr-64 indicate that these nuclei are potential r-process progenitors, after beta-decay, of Fe-58 and Ni-64 in certain inclusions of meteorites. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
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收藏
页码:3 / 19
页数:17
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