Analysis of decay data from neutron-rich nuclei

被引:0
|
作者
U.C. Bergmann
M.J.G. Borge
J. Cederkäll
C. Forssén
E. Fumero
H.O.U. Fynbo
H. Gausemel
H. Jeppesen
B. Jonson
K. Markenroth
T. Nilsson
G. Nyman
K. Riisager
H. Simon
O. Tengblad
L. Weissman
F. Wenander
K. Wilhelmsen Rolander
机构
[1] Experimentell Fysik,
[2] Chalmers Tekniska Högskola,undefined
[3] S-412 96 Göteborg,undefined
[4] Sweden,undefined
[5] Instituto Estructura de la Materia,undefined
[6] CSIC,undefined
[7] E-28006 Madrid,undefined
[8] Spain,undefined
[9] EP Division,undefined
[10] CERN,undefined
[11] CH-1211 Genève 23,undefined
[12] Switzerland,undefined
[13] Fysiska Institutionen,undefined
[14] Stockholms Universitet,undefined
[15] Box 6730,undefined
[16] S-113 85 Stockholm,undefined
[17] Sweden,undefined
[18] Kjemisk Institutt,undefined
[19] Universitetet i Oslo,undefined
[20] Postboks 1033,undefined
[21] Blindern,undefined
[22] N-0315 Oslo,undefined
[23] Norway,undefined
[24] Institut for Fysik og Astronomi,undefined
[25] Aarhus Universitet,undefined
[26] DK-8000 Aarhus C,undefined
[27] Denmark,undefined
[28] Institut für Kernphysik,undefined
[29] Technische Universität,undefined
[30] D-64289 Darmstadt,undefined
[31] Germany,undefined
关键词
PACS. 23.40.-s Beta decay; double beta decay; electron and muon capture – 27.20.+n 6 ?A? 19 – 27.30.+t 20 ?A? 38 – 07.05.Kf Data analysis: algorithms and implementation; data management;
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摘要
The β-decays of the neutron-rich nuclei 12Be and 29Ne have been studied. The statistical correlations between the almost identical half-lives of 12Be and its daughter 12B are analysed for a large sample of 12Be decay data. Stringent mutual bounds are obtained on the parameter set, leading to a precise determination of the 12Be half-life of 21.50±0.04 ms. From a simultaneous detection of β-particles and neutrons from the decay of 29Ne the neutron emission probability, Pn, is determined to 17±5%. No indication of two-neutron emission is seen from this nucleus. An upper limit of 2.2% (90% confidence level) is established for P2n.
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页码:279 / 284
页数:5
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