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Closed Access item New information on β-delayed neutron emission from Be-12, Be-14

Authors:Bergmann, U. C.
Axelsson, L.
García Borge, María José
Fedoseyev, V. N.
Forssén, C.
Fynbo, H. O. U.
Grévy, S.
Hornshøj, P.
Jading, Y.
Jonson, B.
Köster, U.
Markenroth, K.
Marqués, F. M.
Mishin, V. I.
Nilsson, T.
Oberstedt, A.
Ravn, H. L.
Riisager, K.
Schrieder, G.
Sebastian, V.
Simon, H.
Tengblad, Olof
Wenander, F.
Wilhelmsen Rolander, K.
Keywords:Radioactivity: Be-12, Be-14 (from 1 GeV p on UC target, selective mass separation), Measured βn, nn time correlations, Be-12, Be-14 deduced P(n) values, Be-14 deduced P(xn) values, Neutron long counters, [PACS] Properties of specific nuclei listed by mass ranges: 6 ≤ A ≤ 19, [PACS] Relation with nuclear matrix elements and nuclear structure
Issue Date:18-Oct-1999
Publisher:Elsevier
Citation:Nuclear Physics A 658(2): 129-145 (1999)
Abstract:The β-delayed neutron branches from neutron-rich Be-isotopes have been measured with a setup sensitive down to thermal energies. For Be-14 a new value of P(n) = 101 ± 4% has been found for the total neutron-emission probability and an upper limit of 2.4% (95% confidence level) is imposed on the combination P(2n) + 3P(3n) of multi-neutron emission probabilities. Moreover, an improved value of P(n) = 0.50 ± 0.03% has been obtained for Be-12. A time-correlation method, previously developed for a continuous radioactive beam to determine neutron branching ratios, has been revised and adapted to the pulsed secondary beam at ISOLDE, CERN.
Description:17 pages, 3 tables, 5 figures, 1 appendix.-- PACS nrs.: 23.40.Hc; 27.20.+n.
Publisher version (URL):http://dx.doi.org/10.1016/S0375-9474(99)00348-6
URI:http://hdl.handle.net/10261/10048
ISSN:0375-9474
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Appears in Collections:(CFMAC-IEM) Artículos

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