Be-11(beta p), a quasi-free neutron decay?
Journal article, 2014

We have observed beta(-)-delayed proton emission from the neutron-rich nucleus Be-11 by analyzing a sample collected at the ISOLDE facility at CERN with accelerator mass spectrometry (AMS). With a branching ratio of (8.3 +/- 0.9). 10(-6) the strength of this decay mode, as measured by the B-GT-value, is unexpectedly high. The result is discussed within a simple single-particle model and could be interpreted as a quasi-free decay of the Be-11 halo neutron into a single-proton state.

Halo nucleus


Beta decay


K. Riisager

O. Forstner

M. J. G. Borge

J. A. Briz

M. Carmona-Gallardo

L. M. Fraile

H. O. U. Fynbo

T. Giles

A. Gottberg

Andreas Martin Heinz

Chalmers, Fundamental Physics

J. G. Johansen

Björn Jonson

Chalmers, Fundamental Physics

J. Kurcewicz

M. V. Lund

Thomas Nilsson

Chalmers, Fundamental Physics

Göran Hugo Nyman

Chalmers, Fundamental Physics

E. Rapisarda

P. Steier

O. Tengblad

Ronja Thies

Chalmers, Fundamental Physics

S. R. Winkler

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

0370-2693 (ISSN)

Vol. 732 305-308

Subject Categories

Subatomic Physics

Physical Sciences


Basic sciences



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