In-beam $\ensuremath{\gamma}$-ray spectroscopy of $^{35}\mathrm{Mg}$ via knockout reactions at intermediate energies

In-beam $γ$ -ray spectroscopy of ${}^{35}{Mg}$ via knockout reactions at intermediate energies

S. Momiyama, P. Doornenbal, H. Scheit, S. Takeuchi, M. Niikura, N. Aoi, K. Li, M. Matsushita, D. Steppenbeck, H. Wang, H. Baba, E. Ideguchi, M. Kimura, N. Kobayashi, Y. Kondo, J. Lee, S. Michimasa, T. Motobayashi, N. Shimizu, M. Takechi, Y. Togano, Y. Utsuno, K. Yoneda, and H. Sakurai

Phys. Rev. C 96, 034328 – Published 29 September 2017

Abstract

The isotope ${}^{35}{Mg}$ was spectroscopically studied via nucleon-removal reactions from ${}^{36}{Mg}$ and ${}^{37}{Al}$ secondary beams at intermediate energies. The experiment's aim was to clarify the level structure of this nucleus located in between the $N = 20$ and 28 shell quenchings. De-excitation $γ$ -ray energies, exclusive cross sections, and parallel momentum of outgoing ${}^{35}{Mg}$ for several final states were measured and compared to structure calculations in the shell model and antisymmetrized molecular dynamics framework and the eikonal reaction calculation, further developing the level scheme of ${}^{35}{Mg}$ . It was found that a large fraction of the one-neutron knockout reaction goes into unbound states of ${}^{35}{Mg}$ , which may explain missing $f$ -wave strength.

Received 14 April 2017

DOI:https://doi.org/10.1103/PhysRevC.96.034328

Physics Subject Headings (PhySH)

Direct reactions Energy levels

20 ≤ A ≤ 38

Radioactive beams

Nuclear Physics

Authors & Affiliations

S. Momiyama^1,*, P. Doornenbal², H. Scheit^2,3, S. Takeuchi^2,†, M. Niikura¹, N. Aoi^2,‡, K. Li^2,4, M. Matsushita^2,5, D. Steppenbeck², H. Wang^2,4, H. Baba², E. Ideguchi^6,§, M. Kimura⁷, N. Kobayashi^8,∥, Y. Kondo⁸, J. Lee^2,¶, S. Michimasa⁶, T. Motobayashi², N. Shimizu⁶, M. Takechi^2,**, Y. Togano^2,††, Y. Utsuno⁹, K. Yoneda², and H. Sakurai^1,2

¹Department of Physics, University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
²RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
³Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
⁴Peking University, Beijing 100871, China
⁵Department of Physics, Rikkyo University, Toshima, Tokyo 172-8501, Japan
⁶Center for Nuclear Study, University of Tokyo, RIKEN Campus, Wako, Saitama 351-0198, Japan
⁷Department of Physics, Hokkaido University, Sapporo 001-0021, Japan
⁸Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
⁹Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan

^*momiyama@nucl.phys.s.u-tokyo.ac.jp
^†Present address: Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan.
^‡Present address: Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
^§Present address: Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
^∥Present address: Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
^¶Present address: Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong.
^**Present address: Graduate School of Science and Technology, Niigata University, Niigata 950-2102, Japan.
^††Present address: Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan.

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Vol. 96, Iss. 3 — September 2017

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Physical Review C

covering nuclear physics

In-beam $γ$ -ray spectroscopy of ${}^{35}{Mg}$ via knockout reactions at intermediate energies

S. Momiyama, P. Doornenbal, H. Scheit, S. Takeuchi, M. Niikura, N. Aoi, K. Li, M. Matsushita, D. Steppenbeck, H. Wang, H. Baba, E. Ideguchi, M. Kimura, N. Kobayashi, Y. Kondo, J. Lee, S. Michimasa, T. Motobayashi, N. Shimizu, M. Takechi, Y. Togano, Y. Utsuno, K. Yoneda, and H. Sakurai

Phys. Rev. C 96, 034328 – Published 29 September 2017

Abstract

Physics Subject Headings (PhySH)

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Physical Review C

covering nuclear physics

In-beam γ-ray spectroscopy of Mg35 via knockout reactions at intermediate energies

S. Momiyama, P. Doornenbal, H. Scheit, S. Takeuchi, M. Niikura, N. Aoi, K. Li, M. Matsushita, D. Steppenbeck, H. Wang, H. Baba, E. Ideguchi, M. Kimura, N. Kobayashi, Y. Kondo, J. Lee, S. Michimasa, T. Motobayashi, N. Shimizu, M. Takechi, Y. Togano, Y. Utsuno, K. Yoneda, and H. Sakurai

Phys. Rev. C 96, 034328 – Published 29 September 2017

Abstract

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In-beam $γ$ -ray spectroscopy of ${}^{35}{Mg}$ via knockout reactions at intermediate energies