Evidence of a new state in Be-11 observed in the Li-11 beta-decay
Artikel i vetenskaplig tidskrift, 2009

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.

radioactivity

charged particles coincidences

halo structure

partial decay branches

light-nuclei

gamma

emission

radioactivity li-11(beta(-)) [from ta(p

spin and parity assignment

particles

measured beta-delayed he-4

identification of new level in be-11

energy-levels

x)]

he-6 energy

Författare

M. Madurga

CSIC - Instituto de Estructura de la Materia (IEM)

M. J. G. Borge

CSIC - Instituto de Estructura de la Materia (IEM)

M. Alcorta

CSIC - Instituto de Estructura de la Materia (IEM)

L.M. Fraile

Universidad Complutense de Madrid

H. O. U. Fynbo

Aarhus Universitet

Björn Jonson

Chalmers, Teknisk fysik, Subatomär fysik

O. Kirsebom

Aarhus Universitet

G. Martinez-Pinedo

GSI Helmholtz Centre for Heavy Ion Research GmbH

Thomas Nilsson

Chalmers, Teknisk fysik, Subatomär fysik

Göran Hugo Nyman

Chalmers, Teknisk fysik, Subatomär fysik

A. Perea

CSIC - Instituto de Estructura de la Materia (IEM)

A. Poves

Universidad Autonoma de Madrid (UAM)

K. Riisager

Aarhus Universitet

Olof Tengblad

CSIC - Instituto de Estructura de la Materia (IEM)

Elisabeth Tengborn

Chalmers, Teknisk fysik, Subatomär fysik

J. Van der Walle

European Organization for Nuclear Research

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

0370-2693 (ISSN)

Vol. 677 255-259

Ämneskategorier

Subatomär fysik

DOI

10.1016/j.physletb.2009.05.050