High-resolution study of the $^{12}\mathrm{C}$($\ensuremath{\gamma},p{\ensuremath{\gamma}}^{'}$)$^{11}\mathrm{B}$ reaction using a HpGe detector to resolve excited states of $^{11}\mathrm{B}$ through the observation of their \ensuremath{\gamma}-ray decays

High-resolution study of the ${}^{12}C$ ( $γ, p γ^{'}$ ) ${}^{11}B$ reaction using a HpGe detector to resolve excited states of ${}^{11}B$ through the observation of their γ-ray decays

S. A. Morrow, D. Branford, K. Föhl, J. C. McGeorge, J.-O. Adler, K. Hansen, L. Isaksson, M. Lundin, I. J. D. MacGregor, and B. Schroder

Phys. Rev. C 73, 044611 – Published 27 April 2006

Abstract

Relative populations of states in ${}^{11}B$ following the ${}^{12}C$ ( $γ, p$ ) ${}^{11}B$ reaction have been measured with high resolution using a 70% HpGe γ detector to observe decay γ rays from the residual nucleus. The triplet of states near 7 MeV in ${}^{11}B$ are resolved and the measured populations compared to previous data. The analysis includes a consideration of γ-proton angular correlations, which was not made in the previous measurement. The new and previous results corrected for angular correlation effects agree reasonably well with calculations that include one- and two-body nuclear currents, pion exchange, and Δ currents, under the assumption that the photons are mainly absorbed on exchanged pions.

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Received 23 December 2005

DOI:https://doi.org/10.1103/PhysRevC.73.044611

Authors & Affiliations

S. A. Morrow^1,*, D. Branford^1,†, K. Föhl¹, J. C. McGeorge², J.-O. Adler³, K. Hansen³, L. Isaksson³, M. Lundin³, I. J. D. MacGregor², and B. Schroder³

¹School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
²Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
³Department of Nuclear Physics, University of Lund, S-223 62 Lund, Sweden

^*Electronic address: s.a.morrow@gmail.com
^†Electronic address: db@ph.ed.ac.uk

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Vol. 73, Iss. 4 — April 2006

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Physical Review C

covering nuclear physics

High-resolution study of the ${}^{12}C$ ( $γ, p γ^{'}$ ) ${}^{11}B$ reaction using a HpGe detector to resolve excited states of ${}^{11}B$ through the observation of their γ-ray decays

S. A. Morrow, D. Branford, K. Föhl, J. C. McGeorge, J.-O. Adler, K. Hansen, L. Isaksson, M. Lundin, I. J. D. MacGregor, and B. Schroder

Phys. Rev. C 73, 044611 – Published 27 April 2006

Abstract

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Physical Review C

covering nuclear physics

High-resolution study of the C12(γ,pγ')B11 reaction using a HpGe detector to resolve excited states of B11 through the observation of their γ-ray decays

S. A. Morrow, D. Branford, K. Föhl, J. C. McGeorge, J.-O. Adler, K. Hansen, L. Isaksson, M. Lundin, I. J. D. MacGregor, and B. Schroder

Phys. Rev. C 73, 044611 – Published 27 April 2006

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High-resolution study of the ${}^{12}C$ ( $γ, p γ^{'}$ ) ${}^{11}B$ reaction using a HpGe detector to resolve excited states of ${}^{11}B$ through the observation of their γ-ray decays