Unresolved question of the He10 ground state resonance

Z. Kohley*, J. Snyder, T. Baumann, G. Christian, P. A. Deyoung, J. E. Finck, R. A. Haring-Kaye, M. Jones, E. Lunderberg, B. Luther, S. Mosby, A. Simon, J. K. Smith, A. Spyrou, S. L. Stephenson, M. Thoennessen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


The ground state of He10 was populated using a 2p2n-removal reaction from a 59MeV/u Be14 beam. The decay energy of the three-body system, He8+n+n, was measured and a resonance was observed at E=1.60(25)MeV with a 1.8(4)MeV width. This result is in agreement with previous invariant mass spectroscopy measurements, using the Li11(-p) reaction, but is inconsistent with recent transfer reaction results. The proposed explanation that the difference, about 500keV, is due to the effect of the extended halo nature of Li11 in the one-proton knockout reaction is no longer valid as the present work demonstrates that the discrepancy between the transfer reaction results persists despite using a very different reaction mechanism, Be14(-2p2n).

Original languageEnglish (US)
Article number232501
JournalPhysical review letters
Issue number23
StatePublished - Dec 4 2012
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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