Search for the 15Be ground state

A. Spyrou*, J. K. Smith, T. Baumann, B. A. Brown, J. Brown, G. Christian, P. A. Deyoung, N. Frank, S. Mosby, W. A. Peters, A. Schiller, M. J. Strongman, M. Thoennessen, J. A. Tostevin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


A two-proton knockout reaction from a 17C beam at 55 MeV/u was used to produce the unbound nucleus 15Be. No significant number of events were observed for the decay of 15Be into a neutron and a 14Be fragment. An upper limit for the 14Be production cross section of 0.079±0.038 mb was extracted, which is more than an order of magnitude smaller than the predicted two-proton knockout reaction cross section. Based on these results we conclude that any populated states in 15Be decay through three sequential neutron decays into 12Be, via the unbound first excited state of 14Be. Therefore, these states in 15Be must be neutron unbound by more than 1.54 MeV, which is the location of the first excited 2+ state in 14Be.

Original languageEnglish (US)
Article number044309
JournalPhysical Review C - Nuclear Physics
Issue number4
StatePublished - Oct 12 2011
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


Dive into the research topics of 'Search for the 15Be ground state'. Together they form a unique fingerprint.

Cite this