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Closed Access item Search for beta-delayed charged particles from the halo nucleus Be-14

Authors:Jeppesen, H.
Bergmann, U. C.
García Borge, María José
Cederkäll, J.
Fedoseyev, V. N.
Fynbo, H. O. U.
Hansper, V. Y.
Jonson, B.
Markenroth, K.
Mishin, V. I.
Nilsson, T.
Nyman, G.
Riisager, K.
Tengblad, Olof
Wilhelmsen Rolander, K.
Keywords:Radioactivity Be-14(β-),(β- n) [from Ta(p,X)], Measured β-delayed charged particle spectra, branching ratios, β-delayed neutron spectra, Mass separated source, Si-gas telescope, Time distribution analysis, [PACS] Relation with nuclear matrix elements and nuclear structure, [PACS] Properties of specific nuclei listed by mass ranges: 6 ≤ A ≤ 19, [PACS] Single-particle levels and strength functions
Issue Date:14-Aug-2002
Citation:Nuclear Physics A 709(1-4): 119–130 (2002)
Abstract:In a search for β-delayed charged particles from Be-14 we have obtained an upper limit on β-delayed α particles, B(βα) < 1.2 x 10(-4), and found evidence for β-delayed tritons at intensity of 6 x 10(-5) < B(βt) < 4 x 10(-4) (both at 95% confidence level). By adding information on the β-delayed neutron branches from direct measurements at low neutron energy and indirect detection via recoiling nuclei at high energy, and by including also information from earlier experiments, we deduce the β strength distribution from Be-14. This differs significantly from shell-model calculations at high excitation energy.
Description:12 pages, 1 table, 6 figures.-- PACS nrs.: 23.40.Hc; 27.20.+n; 21.10.Pc.-- Printed version published Oct 21, 2002.
Publisher version (URL):http://dx.doi.org/10.1016/S0375-9474(02)01093-X
Appears in Collections:(CFMAC-IEM) Artículos

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