Document Type

Article

Publication Date

12-7-2012

Department

Physics

Abstract

The group state of 10He was populated using a 2p2n-removal from a 59 MeV/u 14Be beam. The decay energy of the three body system, 8He + 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 11Li(-p) reaction, but is consistent 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about 500 keV, is due to the effect of the extended halo nature of 11Li in the one-proton knockout reaction is no longer valid as the present work demonstrates that the discrepancy between the transfer reaction is no longer valid as the present work demonstrates that the discrepancy between the transfer reaction results persists despite using a very different reaction mechanism, 14Be(-2p2n).

Required Publisher's Statement

Orginally published in Physical Review Letters, published by the American Physical Society.

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