Fine structure in the α decay of U219

M. M. Zhang, Y. L. Tian, Y. S. Wang, X. H. Zhou, Z. Y. Zhang, H. B. Yang, M. H. Huang, L. Ma, C. L. Yang, Z. G. Gan, J. G. Wang, H. B. Zhou, S. Huang, X. T. He, S. Y. Wang, W. Z. Xu, H. W. Li, X. X. Xu, L. M. Duan, Z. Z. Ren, S. G. Zhou, and H. S. Xu
Phys. Rev. C 100, 064317 – Published 23 December 2019

Abstract

The heaviest N = 127 even-odd isotone U219 was produced in a fusion evaporation reaction employing Ar40 ions bombarding W183 target. Fusion evaporation residues were separated in flight by the gas-filled recoil separator Spectrometer for Heavy Atoms and Nuclear Structure and subsequently identified using a recoil-α correlation method. The α-decay properties of U219 were measured with improved precision, and two new α-decay lines were observed and assigned as the decays from the ground state of U219 to the (5/2) and (3/2) states of Th215, respectively. The systematics for the α decay of the N = 127 even-odd isotones as well as the low-lying nuclear structure of their N = 125 daughter nuclei are discussed.

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  • Received 19 July 2019
  • Revised 15 November 2019

DOI:https://doi.org/10.1103/PhysRevC.100.064317

©2019 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

M. M. Zhang1,2, Y. L. Tian1,2, Y. S. Wang1,2,3, X. H. Zhou1,2,*, Z. Y. Zhang1,2, H. B. Yang1, M. H. Huang1,2, L. Ma1, C. L. Yang1,2, Z. G. Gan1,2, J. G. Wang1,2, H. B. Zhou4, S. Huang4, X. T. He5, S. Y. Wang6, W. Z. Xu6, H. W. Li6, X. X. Xu7, L. M. Duan1,2, Z. Z. Ren8, S. G. Zhou9,10, and H. S. Xu1,2

  • 1CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 2School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
  • 3School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
  • 4Guangxi Key Laboratory of Nuclear Physics and Technology, Guangxi Normal University, Guilin 541004, China
  • 5College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • 6Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Shandong University, Weihai 264209, China
  • 7Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
  • 8School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
  • 9CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 10Center of Theoretical Nuclear Physics, National Laboratory of Heavy-Ion Accelerator, Lanzhou 730000, China

  • *Corresponding author: zxh@impcas.ac.cn

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Vol. 100, Iss. 6 — December 2019

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