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Analysis of decay data from neutron-rich nuclei |
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| Authors: | UC Bergmann MJG Borge J Cederkäll C Forssén E Fumero HOU 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 |
| Institution: | ECT* and Dipartimento di Fisica, Universitá di Trento, Trento, Italy and University of Sevilla, Sevilla, Spain, Departamento de Física, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina, AR Dipartimento di Fisica and INFN, Università di Padova, Padova, Italy, IT |
| Abstract: | 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. Received: 3 May 2001 / Accepted: 6 August 2001 |
| Keywords: | 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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