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Title: Neutron knockout from 68,70Ni ground and isomeric states

Abstract

Neutron-rich isotopes are an important source of new information on nuclear physics. Specifically, the spin-isospin components in the nucleon-nucleon (NN) interaction, e.g., the proton-neutron tensor force, are expected to modify shell structure in exotic nuclei. These potential changes in the intrinsic shell structure are of fundamental interest. The study of the excitation energy of states corresponding to specific configurations in even-even isotopes, together with the single-particle character of the first excited states of odd-A, neutron-rich Ni isotopes, probes the evolution of the neutron orbitals around the Fermi surface as a function of the neutron number a step forward in the understanding of the region and the nature of the NN interaction at large N/Z ratios. In an experiment carried out at the National Superconducting Cyclotron Laboratory, new spectroscopic information was obtained for 68Ni and the distribution of single-particle strengths in 67,69Ni was characterized by means of single-neutron knockout from 68,70Ni secondary beams. The spectroscopic strengths, deduced from the measured partial cross sections to the individual states tagged by their de-exciting gamma rays, is used to identify and quantify configurations that involve neutron excitations across the N = 40 harmonic oscillator shell closure. Finally, the de-excitation rays were measured with themore » GRETINA tracking array.« less

Authors:
 [1];  [2];  [3];  [4];  [5];  [5];  [3];  [3];  [2];  [2];  [3];  [6];  [5];  [7];  [8];  [6];  [5];  [9];  [10];  [2] more »;  [5];  [11];  [3];  [2];  [11];  [3];  [11];  [2];  [5] « less
  1. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Univ. a degli Studi di Padova, Padova (Italy). Dipartimento di Fisica e Astronomia; Istituto Nazionale di Fisica Nucleare (INFN), Padova (Italy)
  2. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
  3. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab., Dept. of Physics and Astronomy
  4. Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division
  7. Univ. of Maryland, College Park, MD (United States). Dept. of Chemistry and Biochemistry
  8. Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; Univ. of Maryland, College Park, MD (United States). Dept. of Chemistry and Biochemistry
  9. Argonne National Lab. (ANL), Argonne, IL (United States). Nuclear Engineering Division
  10. Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; Centre National de la Recherche Scientifique (CNRS), Orsay (France). Inst. National de Physique Nucleaire et de Physique des Particules (IN2P3), Centre de Sciences Nucleaires et de Sciences de la Matiere (CSNSM)
  11. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab., Dept. of Chemistry
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); Science and Technologies Facilities Council (STFC-UK); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1483987
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
Journal Volume: 966; Journal ID: ISSN 1742-6588
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Recchia, F., Weisshaar, D., Gade, A., Tostevin, J. A., Janssens, R. V. F., Albers, M., Bader, V. M., Baugher, T., Bazin, D., Berryman, J. S., Brown, B. A., Campbell, C. M., Carpenter, M. P., Chen, J., Chiara, C. J., Crawford, H. L., Hoffman, C. R., Kondev, F. G., Korichi, A., Langer, C., Lauritsen, T., Liddick, S. N., Lunderberg, E., Noji, S., Prokop, C., Stroberg, S. R., Suchyta, S., Wimmer, K., and Zhu, S. Neutron knockout from 68,70Ni ground and isomeric states. United States: N. p., 2018. Web. doi:10.1088/1742-6596/966/1/012048.
Recchia, F., Weisshaar, D., Gade, A., Tostevin, J. A., Janssens, R. V. F., Albers, M., Bader, V. M., Baugher, T., Bazin, D., Berryman, J. S., Brown, B. A., Campbell, C. M., Carpenter, M. P., Chen, J., Chiara, C. J., Crawford, H. L., Hoffman, C. R., Kondev, F. G., Korichi, A., Langer, C., Lauritsen, T., Liddick, S. N., Lunderberg, E., Noji, S., Prokop, C., Stroberg, S. R., Suchyta, S., Wimmer, K., & Zhu, S. Neutron knockout from 68,70Ni ground and isomeric states. United States. doi:10.1088/1742-6596/966/1/012048.
Recchia, F., Weisshaar, D., Gade, A., Tostevin, J. A., Janssens, R. V. F., Albers, M., Bader, V. M., Baugher, T., Bazin, D., Berryman, J. S., Brown, B. A., Campbell, C. M., Carpenter, M. P., Chen, J., Chiara, C. J., Crawford, H. L., Hoffman, C. R., Kondev, F. G., Korichi, A., Langer, C., Lauritsen, T., Liddick, S. N., Lunderberg, E., Noji, S., Prokop, C., Stroberg, S. R., Suchyta, S., Wimmer, K., and Zhu, S. Thu . "Neutron knockout from 68,70Ni ground and isomeric states". United States. doi:10.1088/1742-6596/966/1/012048. https://www.osti.gov/servlets/purl/1483987.
@article{osti_1483987,
title = {Neutron knockout from 68,70Ni ground and isomeric states},
author = {Recchia, F. and Weisshaar, D. and Gade, A. and Tostevin, J. A. and Janssens, R. V. F. and Albers, M. and Bader, V. M. and Baugher, T. and Bazin, D. and Berryman, J. S. and Brown, B. A. and Campbell, C. M. and Carpenter, M. P. and Chen, J. and Chiara, C. J. and Crawford, H. L. and Hoffman, C. R. and Kondev, F. G. and Korichi, A. and Langer, C. and Lauritsen, T. and Liddick, S. N. and Lunderberg, E. and Noji, S. and Prokop, C. and Stroberg, S. R. and Suchyta, S. and Wimmer, K. and Zhu, S.},
abstractNote = {Neutron-rich isotopes are an important source of new information on nuclear physics. Specifically, the spin-isospin components in the nucleon-nucleon (NN) interaction, e.g., the proton-neutron tensor force, are expected to modify shell structure in exotic nuclei. These potential changes in the intrinsic shell structure are of fundamental interest. The study of the excitation energy of states corresponding to specific configurations in even-even isotopes, together with the single-particle character of the first excited states of odd-A, neutron-rich Ni isotopes, probes the evolution of the neutron orbitals around the Fermi surface as a function of the neutron number a step forward in the understanding of the region and the nature of the NN interaction at large N/Z ratios. In an experiment carried out at the National Superconducting Cyclotron Laboratory, new spectroscopic information was obtained for 68Ni and the distribution of single-particle strengths in 67,69Ni was characterized by means of single-neutron knockout from 68,70Ni secondary beams. The spectroscopic strengths, deduced from the measured partial cross sections to the individual states tagged by their de-exciting gamma rays, is used to identify and quantify configurations that involve neutron excitations across the N = 40 harmonic oscillator shell closure. Finally, the de-excitation rays were measured with the GRETINA tracking array.},
doi = {10.1088/1742-6596/966/1/012048},
journal = {Journal of Physics. Conference Series},
number = ,
volume = 966,
place = {United States},
year = {2018},
month = {2}
}

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