Cross-section measurements of neutron-deuteron breakup at 13.0 MeV

H. R. Setze, C. R. Howell, W. Tornow, R. T. Braun, D. E. González Trotter, A. H. Hussein, R. S. Pedroni, C. D. Roper, F. Salinas, I. Šlaus, B. Vlahović, R. L. Walter, G. Mertens, J. M. Lambert, H. Witała, and W. Glöckle

Phys. Rev. C 71, 034006 – Published 23 March 2005

Abstract

Cross-section measurements of seven exit-channel configurations in the neutron-deuteron breakup at 13.0 MeV are reported and compared to rigorous calculations. Our data are consistent with those of previous measurements in four of six configurations. The present data for five configurations are in good agreement with theoretical predictions. The cross-section data for the space-star and another out-of-plane configuration are larger than the theoretical predictions by more than three standard deviations. The previously observed 20% discrepancy between theory and data for the space-star configuration is confirmed in the present work. The inclusion of the Tucson-Melbourne $2 π$ -exchange three-nucleon force changes the predicted cross section by only 2% and in the wrong direction needed to bring theory into agreement with data.

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Received 16 August 2004

DOI:https://doi.org/10.1103/PhysRevC.71.034006

Authors & Affiliations

H. R. Setze^*, C. R. Howell, W. Tornow, R. T. Braun, D. E. González Trotter, A. H. Hussein^†, R. S. Pedroni^‡, C. D. Roper, F. Salinas, I. Šlaus^§, B. Vlahović^∥, and R. L. Walter

Duke University and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA

G. Mertens

Institute of Physics, University of Tübingen, D-72074 Tübingen, Germany

J. M. Lambert

Department of Physics, Georgetown University, Washington, District of Columbia 20057, USA

H. Witała

Institute of Physics, Jagellonian University, Reymonta 4, PL-30059 Cracow, Poland

W. Glöckle

Institut für Theoretishe Physik II, Ruhr-Universität Bochum, D-44780 Bochum, Germany

^*Present address: Pearl River Community College, Poplarville, MS 39470, USA.
^†Present address: Physics Department, Univ. of Northern British Columbia, Prince George, BC, Canada.
^‡Present address: Physics Department, North Carolina A&T State Univ., Greensboro, NC 27411, USA.
^§Permanent address: Rudjer Boskovic Institute, Zagreb, Croatia.
^∥Present address: Physics Department, North Carolina Central Univ., Durham, NC 27707, USA.

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Vol. 71, Iss. 3 — March 2005

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Physical Review C

covering nuclear physics