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Phys. Rev. Lett. 83, 3146–3149 (1999)

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

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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

Received 27 May 1999; published in the issue dated 18 October 1999

The 16O(γ,pn) reaction was measured at Eγ72 MeV with resolution sufficient to distinguish the low-lying states of the residual 14N 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 (Jπ,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.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.3146
DOI:
10.1103/PhysRevLett.83.3146
PACS:
25.20.Dc, 21.10.Hw, 27.20.+n

*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.