<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mn>2</mn></mrow><mrow><mo>−</mo></mrow></msup></mrow></math></span> Threshold State in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Be</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>8</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>

L. G. Arnold; R. G. Seyler; Louis Brown; T. I. Bonner; Erich Steiner

doi:10.1103/PhysRevLett.32.895

$2^{-}$ Threshold State in ${}^{8}{Be}$

L. G. Arnold, R. G. Seyler, Louis Brown, T. I. Bonner, and Erich Steiner

Phys. Rev. Lett. 32, 895 – Published 22 April 1974

Abstract

The $2^{-}$ level in ${}^{8}{Be}$ at the threshold for the reaction ${}^{7}{Li} (p, n) {}^{7}{Be}$ is shown to be a virtual state relative to threshold. A description of the state as an $S$ -matrix pole in the scattering-length approximation gives a good account of its properties as observed in different reaction channels, and, in particular, removes an apparent contradiction about its width as observed through particle and $γ$ -ray channels. The width of the $2^{-}$ state is found to be about 50 keV.

Received 26 February 1973

DOI:https://doi.org/10.1103/PhysRevLett.32.895

Authors & Affiliations

L. G. Arnold and R. G. Seyler

Department of Physics, The Ohio State University, Columbus, Ohio 43210

Louis Brown and T. I. Bonner^*

Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, D. C. 20015

Erich Steiner^†

Department of Physics, University of Basel, Basel, Switzerland

^*Fellow of the Carnegie Institution of Washington.
^†Fellow of the Swiss National Foundation and the Carnegie Institution of Washington. Present address: Schweizerisches Institut für Nuklearforschung, Gloriastrasse 35, Zürich, Switzerland.