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Evidence of a new state in Be-11 observed in the Li-11 beta-decay

M. Madurga ; M. J. G. Borge ; M. Alcorta ; L. M. Fraile ; H. O. U. Fynbo ; Björn Jonson (Institutionen för fundamental fysik, Subatomär fysik) ; O. Kirsebom ; G. Martinez-Pinedo ; Thomas Nilsson (Institutionen för fundamental fysik, Subatomär fysik) ; Göran Nyman (Institutionen för fundamental fysik, Subatomär fysik) ; A. Perea ; A. Poves ; K. Riisager ; Olof Tengblad ; Elisabeth Tengborn (Institutionen för fundamental fysik, Subatomär fysik) ; J. Van der Walle
Physics Letters B (0370-2693). Vol. 677 (2009), 5, p. 255-259.
[Artikel, refereegranskad vetenskaplig]

Coincidences between charged particles emitted in the beta-decay of Li-11 were observed using highly segmented detectors. The breakup channels involving three particles were Studied in full kinematics allowing for the reconstruction of the excitation energy of the Be-11 states participating in the decay. In particular, the contribution of a previously unobserved state at 16.3 MeV in Be-11 has been identified selecting the alpha + He-7 -> alpha + He-6 + n channel. The angular correlations between the alpha particle and the center of mass of the He-6 + n system favors spin and parity assignment of 3/2(-) for this state as well as for the previously known state at 18 MeV. (C) 2009 Elsevier B.V. All rights reserved.

Nyckelord: radioactivity li-11(beta(-)) [from ta(p, x)], measured beta-delayed he-4,he-6 energy, charged particles coincidences, identification of new level in be-11, spin and parity assignment, partial decay branches, halo structure, energy-levels, light-nuclei, particles, emission, radioactivity, gamma



Denna post skapades 2009-12-11. Senast ändrad 2014-09-02.
CPL Pubid: 103397

 

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Institutioner (Chalmers)

Institutionen för fundamental fysik, Subatomär fysik (2005-2013)

Ämnesområden

Kärnfysik
Lågenergifysik

Chalmers infrastruktur