Long-lived states at high excitation energies 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> and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">B</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>10</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>

F. Ajzenberg-Selove; C. F. Maguire; D. L. Hendrie; D. K. Scott; J. Mahoney

doi:10.1103/PhysRevC.13.46

Long-lived states at high excitation energies in ${}^{8}{Be}$ and ${}^{10}B$

F. Ajzenberg-Selove, C. F. Maguire, D. L. Hendrie, D. K. Scott, and J. Mahoney

Phys. Rev. C 13, 46 – Published 1 January 1976

Abstract

A study of highly excited states in ${}^{8}{Be}$ and ${}^{10}B$ has been conducted using the ${}^{9}{Be} ({}^{3}{He}, α)$ and ${}^{11}B ({}^{3}{He}, α)$ reactions at $E ({}^{3}{He}) = 49.3$ MeV and the Berkeley magnetic spectrometer. We observe three new states in ${}^{8}{Be}$ at $E_{x} = 22.05, 22.63, and 22.98$ MeV (±0.1 MeV) with $Γ_{c . m .} < 0.3$ MeV. In ${}^{10}B$ we confirm the previously known states ${}^{10}B^{*}$ (10.85, 11.52, 12.56) and report a new state ${}^{10}B^{*}$ (13.49) with $Γ_{c . m .} = 0.3$ MeV, in addition to two broader states. Comparisons are made with the analog regions in ${}^{8}{Li}$ and ${}^{10}{Be}$ .

NUCLEAR REACTIONS ${}^{9}{Be} ({}^{3}{He}, α)$ , ${}^{11}B ({}^{3}{He}, α)$ , $E = 49.3$ MeV; measured $σ (θ)$ . $Γ$ , ${}^{8}{Be}$ , ${}^{10}B$ , deduced levels.

Received 2 October 1975

DOI:https://doi.org/10.1103/PhysRevC.13.46

Authors & Affiliations

F. Ajzenberg-Selove^*

Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19174

C. F. Maguire^†,‡, D. L. Hendrie^‡, D. K. Scott^‡, and J. Mahoney^‡

Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

^*Work supported by the National Science Foundation.
^†Present address: Department of Physics, Vanderbilt University, Nashville, Tennessee.
^‡Work supported by the U.S. Energy Research and Development Administration.

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Vol. 13, Iss. 1 — January 1976

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