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Título : Large asymmetry in the strongest β-transition for A=9
Autor : 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.
Palabras clave : Li-9(β-[from UC(p, X)])
Measured β-delayed Eα
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
Fecha de publicación : 24-Oct-2003
Editor: Elsevier
Resumen: 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.
Descripción : 7 pages, 1 table, 4 figures.-- PACS nrs.: 23.40.Hc; 21.10.Hw; 27.20.+n.-- Printed version published Dec 4, 2003.
Versión del editor:
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2003.09.073
Citación : Physics Letters B 576(1-2): 55–61 (2003)
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