Two-neutron Transfer in the 6He + 209Bi Reaction near the Coulomb Barrier

Authors

Paul A. DeYoung, Department of Physics and Engineering, Hope College
Patrick J. Mears, Department of Physics and Engineering, Hope College
J. J. Kolata, Physics Department, University of Notre Dame
E. F. Aguilera, Departamento del Acelerador, Instituto Nacional de Investigaciones Nucleares
F. D. Becchetti, Physics Department, University of Michigan
Y. Chen, Physics Department, University of Michigan
M. Cloughesy, Physics Department, University of Notre Dame
H. Griffin, Physics Department, University of Michigan
C. Guess, Department of Physics and Engineering, Hope College
J. D. Hinnefeld, Physics Department, Indiana University South Bend
H. Jiang, Physics Department, University of Michigan
Scott R. Jones, Department of Chemistry, Southwest Missouri State University
U. Khadka, Department of Physics and Engineering, Hope College
D. Lizcano, Departamento del Acelerador, Instituto Nacional de Investigaciones Nucleares
E. Martinez-Quiroz, Departamento del Acelerador, Instituto Nacional de Investigaciones Nucleares
M. Ojaniega, Physics Department, University of Michigan
Graham F. Peaslee, Department of Chemistry, Hope CollegeFollow
A. Pena, Department of Physics and Engineering, Hope College
J. Reith, Department of Physics and Engineering, Hope College
S. VanDenDriessche, Physics Department, Indiana University South Bend
J. A. Zimmerman, Department of Chemistry, Southwest Missouri State University

Document Type

Article

Publication Date

5-13-2005

Publication Source

Physical Review C

Volume Number

71

Issue Number

5

First Page

51601

Last Page

51601

Publisher

American Physical Society

Abstract

The cross section for α-particle emission in the He6+Bi209 reaction at energies near the Coulomb barrier is remarkably large. Possible reactions that may produce the observed α particles include two-neutron transfer, one-neutron transfer, and direct projectile breakup. Each of these mechanisms results in a distinctive angular correlation between the α particle and the outgoing neutron(s). A neutron-α-particle coincidence experiment was performed to study two-neutron transfer to unbound states of Bi211. It is shown that approximately 55% of the observed α-particle yield at and beyond the grazing angle is because of this process. This is more than 2.5 times the fraction attributable to single-neutron transfer. The corresponding 2n-transfer cross section is 0.4 ± 0.1 b.

Recommended Citation

Repository citation: DeYoung, Paul A.; Mears, Patrick J.; Kolata, J. J.; Aguilera, E. F.; Becchetti, F. D.; Chen, Y.; Cloughesy, M.; Griffin, H.; Guess, C.; Hinnefeld, J. D.; Jiang, H.; Jones, Scott R.; Khadka, U.; Lizcano, D.; Martinez-Quiroz, E.; Ojaniega, M.; Peaslee, Graham F.; Pena, A.; Reith, J.; VanDenDriessche, S.; and Zimmerman, J. A., "Two-neutron Transfer in the 6He + 209Bi Reaction near the Coulomb Barrier" (2005). Faculty Publications. Paper 1213.
https://digitalcommons.hope.edu/faculty_publications/1213

Published in: Physical Review C, Volume 71, Issue 5, May 13, 2005, pages 51601-51601. Copyright © 2005 American Physical Society.