Unresolved Question of the 10He Ground State Resonance

Authors

Z. KohleyFollow
J. SnyderFollow
T. BaumannFollow
G. ChristianFollow
P.A. DeYoungFollow
J.E. FinckFollow
R.A. Haring-KayeFollow
M. JonesFollow
E. LunderbergFollow
B. LutherFollow
S. MosbyFollow
A. SimonFollow
J.K. SmithFollow
A. SpyrouFollow
Sharon L. Stephenson, Gettysburg CollegeFollow
M. ThoennessenFollow

Document Type

Article

Publication Date

12-7-2012

Department 1

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about 500 keV, is due to the effect of the extended halo nature of ¹¹Li in the one-proton knockout reaction is no longer valid as the present work demonstrates that the discrepancy between the transfer reaction is no longer valid as the present work demonstrates that the discrepancy between the transfer reaction results persists despite using a very different reaction mechanism,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).

Copyright Note

This is the publisher’s version of the work. This publication appears in Gettysburg College’s institutional repository by permission of the copyright for personal use, not for redistribution.

Recommended Citation

Kohley, Z., 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, and M. Thoennessen. "Unresolved Question of the 10He Ground State Resonance." Physical Review Letters 109 (2012): 232501-1 - 232501-5. http://dx.doi.org/10.1103/PhysRevLett.109.232501

Required Publisher's Statement

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