Isomers in Pd-128 and Pd-126: Evidence for a Robust Shell Closure at the Neutron Magic Number 82 in Exotic Palladium Isotopes
- Authors
- Watanabe, H[Watanabe, H.]; Lorusso, G[Lorusso, G.]; Nishimura, S[Nishimura, S.]; Xu, ZY[Xu, Z. Y.]; Sumikama, T[Sumikama, T.]; Soderstrom, PA[Soederstroem, P. -A.]; Doornenbal, P[Doornenbal, P.]; Browne, F[Browne, F.]; Gey, G[Gey, G.]; Jung, HS[Jung, H. S.]; Taprogge, J[Taprogge, J.]; Vajta, Z[Vajta, Zs.]; Wu, J[Wu, J.]; Yagi, A[Yagi, A.]; Baba, H[Baba, H.]; Benzoni, G[Benzoni, G.]; Chae, KY[Chae, K. Y.]; Crespi, FCL[Crespi, F. C. L.]; Fukuda, N[Fukuda, N.]; Gernhauser, R[Gernhaeuser, R.]; Inabe, N[Inabe, N.]; Isobe, T[Isobe, T.]; Jungclaus, A[Jungclaus, A.]; Kameda, D[Kameda, D.]; Kim, GD[Kim, G. D.]; Kim, YK[Kim, Y. K.]; Kojouharov, I[Kojouharov, I.]; Kondev, FG[Kondev, F. G.]; Kubo, T[Kubo, T.]; Kurz, N[Kurz, N.]; Kwon, YK[Kwon, Y. K.]; Lane, GJ[Lane, G. J.]; Li, Z[Li, Z.]; Moon, CB[Moon, C. -B.]; Montaner-Piza, A[Montaner-Piza, A.]; Moschner, K[Moschner, K.]; Naqvi, F[Naqvi, F.]; Niikura, M[Niikura, M.]; Nishibata, H[Nishibata, H.]; Nishimura, D[Nishimura, D.]; Odahara, A[Odahara, A.]; Orlandi, R[Orlandi, R.]; Patel, Z[Patel, Z.]; Podolyak, Z[Podolyak, Zs.]; Sakurai, H[Sakurai, H.]; Schaffner, H[Schaffner, H.]; Simpson, GS[Simpson, G. S.]; Steiger, K[Steiger, K.]; Suzuki, H[Suzuki, H.]; Takeda, H[Takeda, H.]; Wendt, A[Wendt, A.]; Yoshinaga, K[Yoshinaga, K.]
- Issue Date
- 8-Oct-2013
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, v.111, no.15
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW LETTERS
- Volume
- 111
- Number
- 15
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/58978
- DOI
- 10.1103/PhysRevLett.111.152501
- ISSN
- 0031-9007
- Abstract
- The level structures of the very neutron-rich nuclei Pd-128 and Pd-126 have been investigated for the first time. In the r-process waiting-point nucleus Pd-128, a new isomer with a half-life of 5.8(8) mu s is proposed to have a spin and parity of 8(+) and is associated with a maximally aligned configuration arising from the g(9/2) proton subshell with seniority v = 2. For Pd-126, two new isomers have been identified with half-lives of 0.33(4) and 0.44(3) mu s. The yrast 2(+) energy is much higher in Pd-128 than in Pd-126, while the level sequence below the 8(+) isomer in Pd-128 is similar to that in the N = 82 isotone Cd-130. The electric quadrupole transition that depopulates the 8(+) isomer in Pd-128 is more hindered than the corresponding transition in Cd-130, as expected in the seniority scheme for a semimagic, spherical nucleus. These experimental findings indicate that the shell closure at the neutron number N = 82 is fairly robust in the neutron-rich Pd isotopes.
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