Discovery of New Isotope ^{241}U and Systematic High-Precision Atomic Mass Measurements of Neutron-Rich Pa-Pu Nuclei Produced via Multinucleon Transfer Reactions

T Niwase; Y X Watanabe; Y Hirayama; M Mukai; P Schury; A N Andreyev; T Hashimoto; S Iimura; H Ishiyama; Y Ito; S C Jeong; D Kaji; S Kimura; H Miyatake; K Morimoto; J-Y Moon; M Oyaizu; M Rosenbusch; A Taniguchi; M Wada

doi:10.1103/PhysRevLett.130.132502

Discovery of New Isotope ^{241}U and Systematic High-Precision Atomic Mass Measurements of Neutron-Rich Pa-Pu Nuclei Produced via Multinucleon Transfer Reactions

Phys Rev Lett. 2023 Mar 31;130(13):132502. doi: 10.1103/PhysRevLett.130.132502.

Authors

T Niwase¹, Y X Watanabe¹, Y Hirayama¹, M Mukai², P Schury¹, A N Andreyev³, T Hashimoto⁴, S Iimura⁵, H Ishiyama², Y Ito⁶, S C Jeong¹, D Kaji², S Kimura², H Miyatake¹, K Morimoto², J-Y Moon⁴, M Oyaizu¹, M Rosenbusch¹, A Taniguchi⁷, M Wada¹

Affiliations

¹ Wako Nuclear Science Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan.
² RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan.
³ School of Physics, Engineering and Technology, University of York, York YO10 5DD, United Kingdom.
⁴ Institute for Basic Science, 70, Yuseong-daero 1689-gil, Yusung-gu, Daejeon 43000, Korea.
⁵ Department of Physics, Rikkyo University, Tokyo 171-8501, Japan.
⁶ Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki 319-1195, Japan.
⁷ Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan.

PMID: 37067317
DOI: 10.1103/PhysRevLett.130.132502

Abstract

The new isotope ^{241}U was synthesized and systematic atomic mass measurements of nineteen neutron-rich Pa-Pu isotopes were performed in the multinucleon transfer reactions of the ^{238}U+^{198}Pt system at the KISS facility. The present experimental results demonstrate the crucial role of the multinucleon transfer reactions for accessing unexplored neutron-rich actinide isotopes toward the N=152 shell gap in this region of nuclides.