<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">pn</mi></math></span>-Pair Coupling in the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mo>(</mo><mi>γ</mi><mo>,</mo><mi mathvariant="italic">pn</mi><mo>)</mo></math></span> Reaction at 72 MeV

L. Isaksson; J-O. Adler; B-E. Andersson; K. I. Blomqvist; A. Sandell; B. Schröder; P. Grabmayr; S. Klein; G. Mauser; J. R. M. Annand; G. I. Crawford; V. Holliday; J. C. McGeorge; G. J. Miller

doi:10.1103/PhysRevLett.83.3146

$pn$ -Pair Coupling in the $(γ, pn)$ Reaction at 72 MeV

L. Isaksson, J-O. Adler, B-E. Andersson, K. I. Blomqvist, A. Sandell, B. Schröder, P. Grabmayr, S. Klein, G. Mauser, J. R. M. Annand, G. I. Crawford, V. Holliday, J. C. McGeorge, and G. J. Miller

Phys. Rev. Lett. 83, 3146 – Published 18 October 1999

Abstract

The $^{16} O (γ, p n)$ reaction was measured at $E_{γ} \sim 72 MeV$ with resolution sufficient to distinguish the low-lying states of the residual $^{14} N$ nucleus. Cross sections averaged over the acceptance of the detector system were determined for each of the resolved states. The relative population of residual states indicates that proton-neutron pairs coupled to $(J^{π}, T) = (0^{+}, 1)$ play a minor role in the photon absorption process compared to $(1^{+}, 0)$ pairs and that both $L = 0$ and $L = 2$ pairs participate in the reaction.

Received 27 May 1999

DOI:https://doi.org/10.1103/PhysRevLett.83.3146

Authors & Affiliations

L. Isaksson, J-O. Adler, B-E. Andersson^*, K. I. Blomqvist^†, A. Sandell, and B. Schröder

Department of Physics, University of Lund, P.O. Box 118, S-221 00 Lund, Sweden

P. Grabmayr, S. Klein^‡, and G. Mauser^§

Physikalisches Institut der Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany

J. R. M. Annand, G. I. Crawford, V. Holliday, J. C. McGeorge, and G. J. Miller^∥

Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland

^*Present address: Furulundsskolan, S-29480 Sölvesborg, Sweden.
^†Present address: Danfysik A/S, DK-4040 Jyllinge, Denmark.
^‡Present address: Siemens AG, D-81359 München, Germany.
^§Present address: Max-Planck-Institut für Plasmaphysik, D-17493 Greifswald, Germany.
^∥Present address: Daniel Industries Ltd., Larbert FK5 3NS, Scotland.