Physics Letters B (Jan 2020)
A new isomeric state in 218Pa
- M.M. Zhang,
- H.B. Yang,
- Z.G. Gan,
- Z.Y. Zhang,
- M.H. Huang,
- L. Ma,
- C.L. Yang,
- C.X. Yuan,
- Y.S. Wang,
- Y.L. Tian,
- H.B. Zhou,
- S. Huang,
- X.T. He,
- S.Y. Wang,
- W.Z. Xu,
- H.W. Li,
- X.X. Xu,
- J.G. Wang,
- H.R. Yang,
- L.M. Duan,
- W.Q. Yang,
- S.G. Zhou,
- Z.Z. Ren,
- X.H. Zhou,
- H.S. Xu,
- A.A. Voinov,
- Yu.S. Tsyganov,
- A.N. Polyakov,
- M.V. Shumeiko
Affiliations
- M.M. Zhang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- H.B. Yang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Corresponding authors.
- Z.G. Gan
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Z.Y. Zhang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- M.H. Huang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- L. Ma
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- C.L. Yang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- C.X. Yuan
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China; Corresponding authors.
- Y.S. Wang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China; School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
- Y.L. Tian
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- H.B. Zhou
- Guangxi Key Laboratory of Nuclear Physics and Technology, Guangxi Normal University, Guilin 541004, China
- S. Huang
- Guangxi Key Laboratory of Nuclear Physics and Technology, Guangxi Normal University, Guilin 541004, China
- X.T. He
- College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
- S.Y. Wang
- School of Space Science and Physics, Shandong University, Weihai 264209, China
- W.Z. Xu
- School of Space Science and Physics, Shandong University, Weihai 264209, China
- H.W. Li
- School of Space Science and Physics, Shandong University, Weihai 264209, China
- X.X. Xu
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
- J.G. Wang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- H.R. Yang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- L.M. Duan
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- W.Q. Yang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- S.G. Zhou
- CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Z.Z. Ren
- School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
- X.H. Zhou
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- H.S. Xu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- A.A. Voinov
- Joint Institute for Nuclear Research, RU-141980 Dubna, Russian Federation
- Yu.S. Tsyganov
- Joint Institute for Nuclear Research, RU-141980 Dubna, Russian Federation
- A.N. Polyakov
- Joint Institute for Nuclear Research, RU-141980 Dubna, Russian Federation
- M.V. Shumeiko
- Joint Institute for Nuclear Research, RU-141980 Dubna, Russian Federation
- Journal volume & issue
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Vol. 800
Abstract
The decay of 218Pa was investigated by means of α and γ spectroscopy. The nucleus was produced in the fusion reaction 40Ar+182W and separated in flight by the gas-filled recoil separator SHANS (Spectrometer for Heavy Atoms and Nuclear Structure). The known α decays of 218Pa were measured with improved precision and newly assigned to be originating from the ground state, which clarified the ambiguities in their previous assignments. In addition, a new isomeric state in 218Pa decaying with α-particle energies of 9691(15) keV, 9595(21) keV and a half-life of 135−32+62 μs was identified. The spins and parities of the involved states were tentatively assigned on the basis of the systematic α-decay properties of the odd-proton N=127 isotones and shell model calculations. Keywords: Odd-proton N=127 isotones, Isomeric state, α-particle energy, Half-life, Shell model calculation, Spin and parity
