Spectroscopy of neutron-unbound F-27,F-28

Authors

G Christian, Michigan State University
N Frank, Augustana College - Rock Island
S Ash, Augustana College - Rock Island
T Baumann, Michigan State University
Paul A. DeYoung, Hope CollegeFollow
J E. Finck, Central Michigan University
A Gade, Michigan State University
G F. Grinyer, Michigan State University
B Luther, Concordia College - Moorhead
M Mosby, Michigan State University
J K. Smith, Michigan State University
J Snyder, Michigan State University
A Spyrou, Michigan State University
M J. Strongman, Michigan State University
M Thoennessen, Michigan State University
M Warren, Augustana College - Rock Island
D Weisshaar, Michigan State University
A Wersal, Michigan State University

Document Type

Article

Publication Date

3-22-2012

Publication Source

Physical Review C

Volume Number

85

Issue Number

3

Publisher

American Physical Society

ISSN

0556-2813

Abstract

The ground state of F-28 has been observed as an unbound resonance 220 keV above the ground state of F-27. A comparison of this result with USDA/USDB shell model predictions leads to the conclusion that the F-28 ground state is primarily dominated by sd-shell configurations. Here we present a detailed report on the experiment in which the ground state resonance of F-28 was first observed. Additionally, we report the first observation of a neutron-unbound excited state in F-27 at an excitation energy of 2500(220) keV.

Keywords

Article stability, Rich nuclei, Sweeper magnet, Fragmentation, Search, System, O-26, N=20, NSCL

Recommended Citation

Christian, G., N. Frank, S. Ash, T. Baumann, Paul A. DeYoung, J. E. Finck, A. Gade, G. F. Grinyer, B. Luther, M. Mosby, J. K. Smith, J. Snyder, A. Spyrou, M. J. Strongman, M. Thoennessen, M. Warren, D. Weisshaar and A. Wersal. "Spectroscopy of Neutron-Unbound F-27,F-28." Physical Review C 85, no. 3.00 (2012).