Kohley Z, Snyder J, Baumann T, Christian G, DeYoung PA, Finck JE, Haring-Kaye RA, Jones M, Lunderberg E, Luther B, Mosby S, Simon A, Smith JK, Spyrou A, Stephenson SL, Thoennessen M. Unresolved question of the 10He ground state resonance.
Phys Rev Lett 2012;
109:232501. [PMID:
23368186 DOI:
10.1103/physrevlett.109.232501]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Indexed: 06/01/2023]
Abstract
The ground state of (10)He was populated using a 2p2n-removal reaction from a 59 MeV/u (14)Be beam. The decay energy of the three-body system, (8)He+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 (11)Li(-p) reaction, but is inconsistent with recent transfer reaction results. The proposed explanation that the difference, about 500 keV, is due to the effect of the extended halo nature of (11)Li in the one-proton knockout reaction is no longer valid as the present work demonstrates that the discrepancy between the transfer reaction results persists despite using a very different reaction mechanism, (14)Be(-2p2n).
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