skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Neutron-unbound states in {sup 25,26}F

Abstract

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

Authors:
 [1];  [2];  [2]; ;  [3]; ; ;  [4]; ; ;  [1]; ; ; ;  [1];  [2];  [5];  [6];  [7];  [8] more »;  [9];  [10] « less
  1. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
  2. (United States)
  3. Department of Physics, Concordia College, Moorhead, Minnesota 56562 (United States)
  4. Physics Department, Illinois Wesleyan University, Bloomington, Illinois 61701 (United States)
  5. Department of Physics, Wabash College, Crawfordsville, Indiana 47933 (United States)
  6. Department of Physics, Hope College, Holland, Michigan 49423 (United States)
  7. Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859 (United States)
  8. Department of Physics and Astronomy, Indiana University at South Bend, South Bend, Indiana 46634 (United States)
  9. Department of Physics, Marquette University, Milwaukee, Wisconsin 53201 (United States)
  10. Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom)
Publication Date:
OSTI Identifier:
21596799
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.84.037302; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BERYLLIUM 9; EXCITED STATES; FLUORINE 24; FLUORINE 25; FLUORINE 26; GROUND STATES; KEV RANGE 100-1000; MESONS; NEON 26; NEUTRON SEPARATION ENERGY; NEUTRONS; PARITY; RESONANCE; SHELL MODELS; SPECTRA; SPIN; ALKALINE EARTH ISOTOPES; ANGULAR MOMENTUM; BARYONS; BERYLLIUM ISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BINDING ENERGY; BOSONS; ELEMENTARY PARTICLES; ENERGY; ENERGY LEVELS; ENERGY RANGE; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; FERMIONS; FLUORINE ISOTOPES; HADRONS; ISOTOPES; KEV RANGE; LIGHT NUCLEI; MATHEMATICAL MODELS; MILLISECONDS LIVING RADIOISOTOPES; NEON ISOTOPES; NUCLEAR MODELS; NUCLEI; NUCLEONS; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; PARTICLE PROPERTIES; RADIOISOTOPES; STABLE ISOTOPES

Citation Formats

Frank, N., Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, Department of Physics and Astronomy, Augustana College, Rock Island, Illinois 61201, Albertson, D., Luther, B., Bailey, J., Kasperczyk, M., Smith, A., Baumann, T., Bazin, D., Schiller, A., Brown, B. A., Gade, A., Peters, W. A., Thoennessen, M., Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, Brown, J., DeYoung, P. A., Finck, J. E., Hinnefeld, J., Howes, R., and Tostevin, J. A. Neutron-unbound states in {sup 25,26}F. United States: N. p., 2011. Web. doi:10.1103/PHYSREVC.84.037302.
Frank, N., Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, Department of Physics and Astronomy, Augustana College, Rock Island, Illinois 61201, Albertson, D., Luther, B., Bailey, J., Kasperczyk, M., Smith, A., Baumann, T., Bazin, D., Schiller, A., Brown, B. A., Gade, A., Peters, W. A., Thoennessen, M., Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, Brown, J., DeYoung, P. A., Finck, J. E., Hinnefeld, J., Howes, R., & Tostevin, J. A. Neutron-unbound states in {sup 25,26}F. United States. doi:10.1103/PHYSREVC.84.037302.
Frank, N., Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, Department of Physics and Astronomy, Augustana College, Rock Island, Illinois 61201, Albertson, D., Luther, B., Bailey, J., Kasperczyk, M., Smith, A., Baumann, T., Bazin, D., Schiller, A., Brown, B. A., Gade, A., Peters, W. A., Thoennessen, M., Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, Brown, J., DeYoung, P. A., Finck, J. E., Hinnefeld, J., Howes, R., and Tostevin, J. A. Thu . "Neutron-unbound states in {sup 25,26}F". United States. doi:10.1103/PHYSREVC.84.037302.
@article{osti_21596799,
title = {Neutron-unbound states in {sup 25,26}F},
author = {Frank, N. and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 and Department of Physics and Astronomy, Augustana College, Rock Island, Illinois 61201 and Albertson, D. and Luther, B. and Bailey, J. and Kasperczyk, M. and Smith, A. and Baumann, T. and Bazin, D. and Schiller, A. and Brown, B. A. and Gade, A. and Peters, W. A. and Thoennessen, M. and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 and Brown, J. and DeYoung, P. A. and Finck, J. E. and Hinnefeld, J. and Howes, R. and Tostevin, J. A.},
abstractNote = {Neutron-unbound states in {sup 25}F and {sup 26}F were populated via the reactions {sup 9}Be({sup 26}Ne,{sup 24}F + n) and {sup 9}Be({sup 26}Ne,{sup 25}F + n), respectively. A resonance close to the neutron separation energy in {sup 25}F was identified with a decay energy of 28{+-}4 keV. This resonance corresponds to an excited state in {sup 25}F at 4249{+-}116 keV assuming it decays to the ground state of {sup 24}F. Guided by shell-model calculations, a spin and parity of 1/2{sup -} can be assigned to this state. In the spectrum of {sup 26}F, which was produced in a nucleon-exchange reaction, there are indications for an excited state with a decay energy of {approx}270 keV.},
doi = {10.1103/PHYSREVC.84.037302},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}