Neutron knockout of 12(Be) populating neutron-unbound states in 11(Be)

Authors

W. A. Peters, Rutgers University - New Brunswick/Piscataway
T. Baumann, Michigan State University
B. A. Brown, Michigan State University
J. Brown, Wabash College
Paul DeYoung, Hope CollegeFollow
J. E. Finck, Central Michigan University
N. Frank, Michigan State University
K. L. Jones, Rutgers University - New Brunswick/Piscataway
J. L. Lecouey, Michigan State University
B. Luther, Concordia College - Moorhead
Graham F. Peaslee, Hope CollegeFollow
W. F. Rogers, Westmont College
A. Schiller, Michigan State University
M. Thoennessen, Michigan State
J. A. Tostevin, University of Surrey
K. Yoneda, Michigan State University

Document Type

Article

Publication Date

5-31-2011

Publication Source

Physical Review C

Volume Number

83

Issue Number

5

First Page

057304

Publisher

American Physical Society

ISSN

0556-2813

Comments

Article co-authored by 14 additional non-Hope College authors from eight other institutions.

Abstract

Neutron-unbound resonant states of Be-11 were populated in neutron knockout reactions from Be-12 and identified by Be-10-n coincidence measurements. A resonance in the decay-energy spectrum at 80(2) keV was attributed to a highly excited unbound state in Be-11 at 3.949(2) MeV decaying to the 2(+) excited state in Be-10. A knockout cross section of 15(3) mb was inferred for this 3.949(2) MeV state, suggesting a spectroscopic factor near unity for this 0p3/2-level, consistent with the detailed shell model calculations.

Keywords

ENERGY-LEVELS; LIGHT-NUCLEI; LI-11; FRAGMENTATION; EMISSION

Recommended Citation

Published in: Physical Review C, Volume 83, Issue 5, May 31, 2011, pages 057304-. Copyright © 2011 American Physical Society, College Park, MD. The final published version is available at: http://dx.doi.org/10.1103/PhysRevC.83.057304