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K-mixing in the doubly mid-shell nuclide Dy-170 and the role of vibrational degeneracyopen access
- Authors
- Soderstrom, PA[Soderstrom, P. -A.]; Walker, PM[Walker, P. M.]; Wu, J[Wu, J.]; Liu, HL[Liu, H. L.]; Regan, PH[Regan, P. H.]; Watanabe, H[Watanabe, H.]; Doornenbal, P[Doornenbal, P.]; Korkulu, Z[Korkulu, Z.]; Lee, P[Lee, P.]; Liu, JJ[Liu, J. J.]; Lorusso, G[Lorusso, G.]; Nishimura, S[Nishimura, S.]; Phong, VH[Phong, V. H.]; Sumikama, T[Sumikama, T.]; Xu, FR[Xu, F. R.]; Yagi, A[Yagi, A.]; Zhang, GX[Zhang, G. X.]; Ahn, DS[Ahn, D. S.]; Alharbi, T[Alharbi, T.]; Baba, H[Baba, H.]; Browne, F[Browne, F.]; Bruce, AM[Bruce, A. M.]; Carroll, RJ[Carroll, R. J.]; Chae, KY[Chae, K. Y.]; Dombradi, Z[Dombradi, Zs.]; Estrade, A[Estrade, A.]; Fukuda, N[Fukuda, N.]; Griffin, CJ[Griffin, C. J.]; Ideguchi, E[Ideguchi, E.]; Inabe, N[Inabe, N.]; Isobe, T[Isobe, T.]; Kanaoka, H[Kanaoka, H.]; Kanaya, S[Kanaya, S.]; Kojouharov, I[Kojouharov, I.]; Kondev, FG[Kondev, F. G.]; Kubo, T[Kubo, T.]; Kubono, S[Kubono, S.]; Kurz, N[Kurz, N.]; Kuti, I[Kuti, I.]; Lalkovski, S[Lalkovski, S.]; Lane, GJ[Lane, G. J.]; Lee, EJ[Lee, E. J.]; Lee, CS[Lee, C. S.]; Lotay, G[Lotay, G.]; Moon, CB[Moon, C. -B.]; Nishizuka, I[Nishizuka, I.]; Nita, CR[Nita, C. R.]; Odahara, A[Odahara, A.]; Patel, Z[Patel, Z.]; Podolyak, Z[Podolyak, Zs.]; Roberts, OJ[Roberts, O. J.]; Sakurai, H[Sakurai, H.]; Schaffner, H[Schaffner, H.]; Shand, CM[Shand, C. M.]; Suzuki, H[Suzuki, H.]; Takeda, H[Takeda, H.]; Terashima, S[Terashima, S.]; Vajta, Z[Vajta, Zs.]; Valiente-Dobon, JJ[Valiente-Dobon, J. J.]; Xu, ZY[Xu, Z. Y.]
- Issue Date
- 10-Nov-2016
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- K isomer; Dysprosium; Mid-shell; gamma-Ray spectroscopy
- Citation
- PHYSICS LETTERS B, v.762, pp.404 - 408
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICS LETTERS B
- Volume
- 762
- Start Page
- 404
- End Page
- 408
- ISSN
- 0370-2693
- Abstract
- A detailed study of the structure of the doubly mid-shell nucleus Dy-170(66)104 has been carried out, following isomeric and beta decay. We have measured the yrast band up to the spin-parity J(pi) = 6(+) state, the K = 2 gamma-vibration band up to the 5(+) state, a low-lying negative-parity band based on a 2(-) state that could be a candidate for the lowest energy octupole vibration state within this nucleus, and a candidate for the K-pi = 6(+) two quasi-particle isomer. This state was determined to have an excitation energy of 1643.91(23) keV and a half life of 0.99(4) mu s, with a reduced hindrance for its decay to the ground-state band an order of magnitude lower than predicted by NpNn systematics. This is interpreted as being due to gamma-vibrational mixing from a near degeneracy of the isomer and the 6(+) state of the gamma band. Furthermore, the parent nucleus Tb-170 has been determined to have a half-life of 0.91((+18)(-13)) s with a possible spin-parity of 2(-). (C) 2016 The Author(s). Published by Elsevier B.V.
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