Probing the sustainability of the N=82 and Z=50 shell closures for neutron-rich nuclides: Decay of $^{120}$Rh$^{75}$ to levels of $^{120}$Pd$^{74}$

Citation:

Walters WB, Tomlin BE, Mantica PF, Brown BA, Rikovska Stone J, Davies AD, Estrade A, Hosmer PT, Hoteling N, Liddick SN, et al. Probing the sustainability of the N=82 and Z=50 shell closures for neutron-rich nuclides: Decay of $^{120}$Rh$^{75}$ to levels of $^{120}$Pd$^{74}$. Phys. Rev. C. 2004;70:0343141–0343145.

Abstract:

The low-energy levels of 120Pd74 were populated by ? decay of 120Rh75, which was produced via projectile fragmentation of a 136Xe82 beam at 120 MeV/nucleon. Delayed ?-gated ? rays with energies of 438 and 618 keV were observed in coincidence with 120Rh75 fragments and assigned to the 21+ ? 0+ and 41+ ? 21+ transitions, respectively, in 120Pd74. Isomeric ?-ray transitions are also reported for 120Rh75 and 126Cd78. The low-energy structure of 120Pd74 shows remarkable similarity to those of the isotopic 108Pd62 and isotonic 128Xe74 suggesting that these nuclides share the same Z=50 and N=82 closed shell structures with neutron-rich 120Pd 74.