Excitations in the halo nucleus <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup></mrow><mi mathvariant="normal">He</mi></math></span> following the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>7</mn></mrow></msup></mrow><mi mathvariant="normal">Li</mi><mo>(</mo><mi>γ</mi><mrow><msup><mrow><mo>,</mo><mi>p</mi><mo>)</mo></mrow><mrow><mn>6</mn></mrow></msup></mrow><mi mathvariant="normal">He</mi></math></span> reaction

M. J. Boland; M. A. Garbutt; R. P. Rassool; M. N. Thompson; A. J. Bennett; J. W. Jury; J.-O. Adler; B. Schröder; D. Nilsson; K. Hansen; M. Karlsson; M. Lundin; I. J. D. MacGregor

doi:10.1103/PhysRevC.64.031601

Rapid Communication

Excitations in the halo nucleus $^{6} He$ following the $^{7} Li (γ {, p)}^{6} He$ reaction

M. J. Boland, M. A. Garbutt, R. P. Rassool, M. N. Thompson, A. J. Bennett, J. W. Jury, J.-O. Adler, B. Schröder, D. Nilsson, K. Hansen, M. Karlsson, M. Lundin, and I. J. D. MacGregor

Phys. Rev. C 64, 031601(R) – Published 26 July 2001

Abstract

A broad excited state was observed in $^{6} He$ with energy $E_{x} = 5 \pm 1$ MeV and width $Γ = 3 \pm 1$ MeV, following the reaction $^{7} Li (γ {, p)}^{6} He .$ The state is consistent with a number of broad resonances predicted by recent cluster model calculations. The well-established reaction mechanism, combined with a simple and transparent analysis procedure confers considerable validity to this observation.