Observation of the Lowest <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>p</mi></math>-Shell <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>T</mi><mo>=</mo><mfrac><mrow><mn>3</mn></mrow><mrow><mn>2</mn></mrow></mfrac></math> States of <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>11</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">C</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>11</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>

S. W. Cosper; Robert L. McGrath; Joseph Cerny; Creve C. Maples; George W. Goth; Donald G. Fleming

doi:10.1103/PhysRev.176.1113

Observation of the Lowest $p$ -Shell $T = \frac{3}{2}$ States of ${}^{11}B$ and ${}^{11}C$

S. W. Cosper, Robert L. McGrath, Joseph Cerny, Creve C. Maples, George W. Goth, and Donald G. Fleming

Phys. Rev. 176, 1113 – Published 20 December 1968

Abstract

The ${}^{11}B$ and ${}^{11}C$ $T = \frac{3}{2}$ analogs of the ${}^{11}{Be}$ (0.32-MeV) state have been located utilizing the ${}^{13}C (p, {}^{3}{He}) {}^{11}B$ and ${}^{13}C (p, t) {}^{11}C$ reactions. The new states lie at 12.94±0.05 MeV in ${}^{11}B$ and at 12.47±0.06 MeV in ${}^{11}C$ , and have total widths of 350±50 and 550±50 keV, respectively; their spins and parities are found to be $½^{-}$ . A check on their isospin purity is achieved by examination of their charged-particle decay properties; it is found that the major decay mode is via $L = 1$ isospin-allowed proton emission.

Received 8 August 1968

DOI:https://doi.org/10.1103/PhysRev.176.1113

Authors & Affiliations

S. W. Cosper^*, Robert L. McGrath^†, Joseph Cerny, Creve C. Maples, George W. Goth, and Donald G. Fleming^‡

Lawrence Radiation Laboratory and Department of Chemistry, University of California, Berkeley, California 94720

^*Present address: Physics Department, University of South-Western Louisiana, Lafayette, La.
^†Present address: Physics Department, State University of New York, Stony Brook, N. Y.
^‡Present address: The Nuclear Structure Laboratory, University of Rochester, Rochester, N. Y.

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Vol. 176, Iss. 4 — December 1968

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