Neutron-unbound states in (25,26)F

Authors

N. Frank, Michigan State University
D. Albertson, Concordia College - Moorhead
J. Bailey, Illinois Wesleyan University
T. Baumann, Michigan State University
D. Bazin, Michigan State University
B. A. Brown, Michigan State University
J. Brown, Wabash College
Paul DeYoung, Hope CollegeFollow
J. E. Finck, Central Michigan University
A. Gade, Michigan State University
J. Hinnefeld, Indiana University - South Bend
R. Howes, Marquette University
M. Kasperczyk, Illinois Wesleyan University
B. Luther, Concordia College - Moorhead
W. A. Peters, Michigan State University
A. Schiller, Michigan State University
A. Smith, Illinois Wesleyan University
M. Thoennessen, Michigan State University
J. A. Tostevin, University Surrey

Document Type

Article

Publication Date

9-6-2011

Publication Source

Physical Review C

Volume Number

84

Issue Number

3

ISSN

0556-2813

Abstract

Neutron-unbound states in (25)F and (26)F were populated via the reactions (9)Be((26)Ne,(24)F + n) and (9)Be((26)Ne, (25)F + n), respectively. A resonance close to the neutron separation energy in (25)F was identified with a decay energy of 28 +/- 4 keV. This resonance corresponds to an excited state in (25)F at 4249 +/- 116 keV assuming it decays to the ground state of (24)F. Guided by shell-model calculations, a spin and parity of 1/2(-) can be assigned to this state. In the spectrum of (26)F, which was produced in a nucleon-exchange reaction, there are indications for an excited state with a decay energy of similar to 270 keV.

Recommended Citation

Published in: Physical Review C, Volume 84, Issue 3, September 6, 2011. The final published version is available at: http://dx.doi.org/10.1103/PhysRevC.84.037302