TY - JOUR

T1 - [Formula Presented]-decay half-lives of new neutron-rich isotopes [Formula Presented] and levels in [Formula Presented]

AU - Asai, M.

AU - Ichikawa, S.

AU - Tsukada, K.

AU - Sakama, M.

AU - Shibata, M.

AU - Kojima, Y.

AU - Osa, A.

AU - Nishinaka, I.

AU - Nagame, Y.

AU - Kawade, K.

AU - Tachibana, T.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - [Formula Presented]-decay half-lives of new neutron-rich isotopes [Formula Presented] and [Formula Presented] produced in the 20 MeV proton-induced fission of [Formula Presented] have been determined to be 19.4(27) s and 8.2(13) s, respectively, using a gas-jet coupled on-line isotope separator. The present half-lives and those of the recently identified nuclei [Formula Presented] [Formula Presented] were compared with theoretical predictions. The recent calculation by the gross theory with the new one-particle strength functions shows quite good agreement with the experimental half-lives. Excited states of the daughter nuclides [Formula Presented] and [Formula Presented] have been established for the first time. Level energies of the first [Formula Presented] states in even-even Dy isotopes were found to show an irregular behavior at [Formula Presented] and increasing deformation toward the neutron midshell around [Formula Presented].

AB - [Formula Presented]-decay half-lives of new neutron-rich isotopes [Formula Presented] and [Formula Presented] produced in the 20 MeV proton-induced fission of [Formula Presented] have been determined to be 19.4(27) s and 8.2(13) s, respectively, using a gas-jet coupled on-line isotope separator. The present half-lives and those of the recently identified nuclei [Formula Presented] [Formula Presented] were compared with theoretical predictions. The recent calculation by the gross theory with the new one-particle strength functions shows quite good agreement with the experimental half-lives. Excited states of the daughter nuclides [Formula Presented] and [Formula Presented] have been established for the first time. Level energies of the first [Formula Presented] states in even-even Dy isotopes were found to show an irregular behavior at [Formula Presented] and increasing deformation toward the neutron midshell around [Formula Presented].

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U2 - 10.1103/PhysRevC.59.3060

DO - 10.1103/PhysRevC.59.3060

M3 - Article

AN - SCOPUS:0001766481

SN - 0556-2813

VL - 59

SP - 3060

EP - 3065

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 6

ER -