Phys.Rev.Lett. 130, 132502 (2023)

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

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

NUCLEAR REACTIONS ¹⁹⁸Pt(²³⁸U, X)²³⁵U/²³⁶U/²³⁷U/²³⁸U/²³⁹U/²⁴⁰U/²⁴¹U/²⁴²U/²³⁵Pa/²³⁶Pa/²³⁷Pa/²³⁹Np/²⁴⁰Np/²⁴¹Np/²³⁹Pu/²⁴⁰Pu/²⁴¹Pu/²⁴²Pu, E=10.75 MeV/nucleon; measured reaction products, TOF. ²⁴¹U; deduced new isotope production. The KEK Isotope Separation System (KISS) for the nuclear spectroscopy of nuclides produced via MNT reactions, installed at the RIKEN Nishina Center.

ATOMIC MASSES ^{235,236,237,238,239,240,241,242}U, ^235,236,237Pa, ^239,240,241Np, ^{239,240,241,242}Pu; measured frequencies (the first excitation step laser wavelength), TOF; deduced mass excesses. Comparison with AME2020 evaluation.

doi: 10.1103/PhysRevLett.130.132502