Gamow-Teller unit cross sections for (t,He3) and (He3,t) reactions

G. Perdikakis, R. G. T. Zegers, Sam M. Austin, D. Bazin, C. Caesar, J. M. Deaven, A. Gade, D. Galaviz, G. F. Grinyer, C. J. Guess, C. Herlitzius, G. W. Hitt, M. E. Howard, R. Meharchand, S. Noji, H. Sakai, Y. Shimbara, E. E. Smith, and C. Tur
Phys. Rev. C 83, 054614 – Published 23 May 2011

Abstract

The proportionality between differential cross sections at vanishing linear momentum transfer and Gamow-Teller transition strength, expressed in terms of the unit cross section (σ̂GT), was studied as a function of target mass number for (t,He3) and (He3,t) reactions at 115A MeV and 140A MeV, respectively. Existing (He3,t) and (t,He3) data on targets with mass number 12A120 were complemented with new and reevaluated (t,He3) data on proton, deuteron, Li6, and C12 targets. It was found that in spite of the small difference in beam energies between the two probes, the unit cross sections have a nearly identical and simple dependence on target mass number A, for A12: σ̂GT=109/A0.65. The factorization of the unit cross sections in terms of a kinematical factor, a distortion factor, and the strength of the effective spin-isospin transfer nucleus-nucleus interaction was investigated. Simple phenomenological functions depending on mass number A were extracted for the latter two. By comparison with plane and distorted-wave Born approximation calculations, it was found that the use of a short-range approximation for knock-on exchange contributions to the transition amplitude results in overestimated cross sections for reactions involving the composite (He3,t) and (t,He3) probes.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
3 More
  • Received 31 January 2011

DOI:https://doi.org/10.1103/PhysRevC.83.054614

©2011 American Physical Society

Authors & Affiliations

G. Perdikakis1,2,*, R. G. T. Zegers1,2,3,†, Sam M. Austin1,2, D. Bazin1, C. Caesar2,4, J. M. Deaven1,2,3, A. Gade1,3, D. Galaviz1,2,‡, G. F. Grinyer1,§, C. J. Guess1,2,3, C. Herlitzius2,4, G. W. Hitt1,2,3, M. E. Howard2,5, R. Meharchand1,2,3, S. Noji6, H. Sakai6, Y. Shimbara7, E. E. Smith2,5, and C. Tur1,2

  • 1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321, USA
  • 2Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
  • 3Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
  • 4Johannes Gutenberg Universität, Mainz, Germany
  • 5Department of Physics, The Ohio State University, Ohio 43210, USA
  • 6Department of Physics, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
  • 7Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan

  • *perdikak@nscl.msu.edu
  • zegers@nscl.msu.edu
  • Present address: Centro de Fisica Nuclear da Universidade de Lisboa, 1649-003, Lisbon, Portugal.
  • §Present address: Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Bvd Henri Becquerel, F-14076 Caen, France.

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 83, Iss. 5 — May 2011

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×