Neutron knockout from ^68,70Ni ground and isomeric states

Journal Article · Thu Feb 01 00:00:00 EST 2018 · Journal of Physics. Conference Series

DOI:https://doi.org/10.1088/1742-6596/966/1/012048· OSTI ID:1483987

Recchia, F. ^[1]; Weisshaar, D. ^[2]; Gade, A. ^[3]; Tostevin, J. A. ^[4]; Janssens, R. V. F. ^[5]; Albers, M. ^[5]; Bader, V. M. ^[3]; Baugher, T. ^[3]; Bazin, D. ^[2]; Berryman, J. S. ^[2]; Brown, B. A. ^[3]; Campbell, C. M. ^[6]; Carpenter, M. P. ^[5]; Chen, J. ^[7]; Chiara, C. J. ^[8]; Crawford, H. L. ^[6]; Hoffman, C. R. ^[5]; Kondev, F. G. ^[9]; Korichi, A. ^[10]; Langer, C. ^[2] ; Lauritsen, T. ^[5]; Liddick, S. N. ^[11]; Lunderberg, E. ^[3]; Noji, S. ^[2]; Prokop, C. ^[11]; Stroberg, S. R. ^[3]; Suchyta, S. ^[11]; Wimmer, K. ^[2]; Zhu, S. ^[5]

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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

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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); Science and Technologies Facilities Council (STFC-UK); USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 1483987
• Journal Information: Journal of Physics. Conference Series, Vol. 966; ISSN 1742-6588
• Publisher: IOP Publishing
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS