¹¹Be(βp), a quasi-free neutron decay?

Author(s)

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, A. Heinz, J. G. Johansen, B. Jonson, J. Kurcewicz, M. V. Lund, T. Nilsson, G. Nyman, E. Rapisarda, P. Steier, O. Tengblad, R. Thies, Stephan Winkler

Abstract

We have observed ^{β -}-delayed proton emission from the neutron-rich nucleus ¹¹Be 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 ¹¹Be halo neutron into a single-proton state.

Organisation(s)

Isotope Physics

External organisation(s)

Aarhus University, European Organization for Nuclear Research (CERN), Spanish National Research Council (CSIC), Universidad Complutense de Madrid, Chalmers University of Technology, Österreichische Akademie der Wissenschaften (ÖAW)

Journal

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

Volume

732

Pages

305-308

No. of pages

4

ISSN

0370-2693

DOI

https://doi.org/10.1016/j.physletb.2014.03.062

Publication date

05-2014

Peer reviewed

Yes

Austrian Fields of Science 2012

103014 Nuclear physics

Keywords

ASJC Scopus subject areas

Nuclear and High Energy Physics

Portal url

https://ucrisportal.univie.ac.at/en/publications/9c404ffe-0605-4004-bfaa-d9f654c41b6b