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Closed Access item Large asymmetry in the strongest β-transition for A=9

Authors:Prezado, Yolanda
Bergmann, U. C.
García Borge, María José
Cederkäll, J.
Diget, C. Aa.
Fraile, Luis M.
Fynbo, H. O. U.
Jeppesen, H.
Jonson, B.
Meister, M.
Nilsson, T.
Nyman, G.
Riisager, K.
Tengblad, Olof
Weissmann, L.
Wilhelmsen Rolander, K.
Keywords:Li-9(β-[from UC(p, X)]), Measured β-delayed Eα, αα-coinc, Be-9 deduced β-branching strengths, A=9 β-decay asymmetry, [PACS] Relation with nuclear matrix elements and nuclear structure, [PACS] Spin, parity, and isobaric spin, [PACS] Properties of specific nuclei listed by mass ranges: 6 ≤ A ≤ 19
Issue Date:24-Oct-2003
Publisher:Elsevier
Citation:Physics Letters B 576(1-2): 55–61 (2003)
Abstract:A new measurement of the β-decay of Li-9 has clarified the feeding to the highest accessible states in Be-9. It is found that the β-decay mainly populates the 11.8 MeV state, whose spin is determined as 5/2(-). The extracted B-GT value of 5.3(0.9) is a factor 4.4(1.0) larger than that of the mirror transition from C-9. A theoretical explanation of such a pronounced β-decay asymmetry is presently lacking.
Description:7 pages, 1 table, 4 figures.-- PACS nrs.: 23.40.Hc; 21.10.Hw; 27.20.+n.-- Printed version published Dec 4, 2003.
Publisher version (URL):http://dx.doi.org/10.1016/j.physletb.2003.09.073
URI:http://hdl.handle.net/10261/7559
ISSN:0370-2693
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Appears in Collections:(CFMAC-IEM) Artículos

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