Neutron transfer studies on Mg25 and its correlation to neutron radiative capture processes

Y. Chen, G. P. A. Berg, R. J. deBoer, J. Görres, H. Jung, A. Long, K. Seetedohnia, R. Talwar, M. Wiescher, S. Adachi, H. Fujita, Y. Fujita, K. Hatanaka, C. Iwamoto, B. Liu, S. Noji, H.-J. Ong, and A. Tamii
Phys. Rev. C 103, 035809 – Published 15 March 2021

Abstract

Radiative neutron capture reactions play an important role in nuclear astrophysics. In some cases direct neutron capture reaction studies are not possible and neutron transfer reactions have been suggested as a surrogate approach. We have performed a detailed study of the Mg25(d,p)Mg26 reaction at a beam energy of 56 MeV as a surrogate reaction to the radiative neutron capture reaction Mg25(n,γ)Mg26. A large number of neutron bound and unbound states between 10.6 and 12.1 MeV excitation energy in Mg26 were observed. Angular distribution analysis provided information about the orbital momentum transfer populating these levels. The comparison with resonances observed in the Mg25(n,γ)Mg26 reaction indicate that different levels in Mg26 are being populated through the two reaction mechanisms, causing substantial discrepancies in the reaction-rate prediction. This result demonstrates that neutron transfer reaction studies may not necessarily lead to reliable predictions for neutron capture reaction rates.

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  • Received 28 October 2020
  • Revised 26 January 2021
  • Accepted 4 March 2021

DOI:https://doi.org/10.1103/PhysRevC.103.035809

©2021 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Y. Chen, G. P. A. Berg, R. J. deBoer, J. Görres, H. Jung, A. Long, K. Seetedohnia, R. Talwar, and M. Wiescher

  • The Joint Institute for Nuclear Astrophysics, Department of Physics, Notre Dame, Indiana 46556, USA

S. Adachi, H. Fujita, Y. Fujita, K. Hatanaka, C. Iwamoto*, B. Liu, S. Noji, H.-J. Ong, and A. Tamii

  • Research Center for Nuclear Physics, Osaka University, Ibaraki, Oska 567-0047, Japan

  • *Present address: RIKEN Center for Advanced Photonics, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Present address: National Superconducting Syclotron Laboratory, Michigan State University, 640 South Shaw Lane, East Lansing, MI 48824, USA.
  • Present address: CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China.

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Issue

Vol. 103, Iss. 3 — March 2021

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