Shape evolution in 116,118Ru: Triaxiality and transition between the O(6) and U(5) dynamical symmetries

P. A. Söderström; G. Lorusso; H. Watanabe; S. Nishimura; P. Doornenbal; G. Thiamova; F. Browne; G. Gey; H. S. Jung; T. Sumikama; J. Taprogge; Zs Vajta; J. Wu; Z. Y. Xu; H. Baba; G. Benzoni; K. Y. Chae; F. C.L. Crespi; N. Fukuda; R. Gernhäuser; N. Inabe; T. Isobe; A. Jungclaus; D. Kameda; G. D. Kim; Y. K. Kim; I. Kojouharov; F. G. Kondev; T. Kubo; N. Kurz; Y. K. Kwon; G. J. Lane; Z. Li; A. Montaner-Pizá; K. Moschner; F. Naqvi; M. Niikura; H. Nishibata; A. Odahara; R. Orlandi; Z. Patel; Zs Podolyák; H. Sakurai; H. Schaffner; G. S. Simpson; K. Steiger; H. Suzuki; H. Takeda; A. Wendt; A. Yagi; K. Yoshinaga

doi:10.1103/PhysRevC.88.024301

Shape evolution in 116^,118Ru: Triaxiality and transition between the O(6) and U(5) dynamical symmetries

P. A. Söderström^*, G. Lorusso, H. Watanabe, S. Nishimura, P. Doornenbal, G. Thiamova, F. Browne, G. Gey, H. S. Jung, T. Sumikama, J. Taprogge, Zs Vajta, J. Wu, Z. Y. Xu, H. Baba, G. Benzoni, K. Y. Chae, F. C.L. Crespi, N. Fukuda, R. GernhäuserN. Inabe, T. Isobe, A. Jungclaus, D. Kameda, G. D. Kim, Y. K. Kim, I. Kojouharov, F. G. Kondev, T. Kubo, N. Kurz, Y. K. Kwon, G. J. Lane, Z. Li, A. Montaner-Pizá, K. Moschner, F. Naqvi, M. Niikura, H. Nishibata, A. Odahara, R. Orlandi, Z. Patel, Zs Podolyák, H. Sakurai, H. Schaffner, G. S. Simpson, K. Steiger, H. Suzuki, H. Takeda, A. Wendt, A. Yagi, K. Yoshinaga

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

116Ru and 118Ru have been studied via β-delayed γ-ray spectroscopy of nuclei produced in fragmentation reactions at the Radioactive Ion-Beam Factory (RIBF) facility. Level schemes with positive-parity states up to spin J=6 have been constructed. The results have been discussed in terms of the interacting boson model, the algebraic collective model, and total Routhian surfaces. We conclude that the very neutron-rich nuclei still show many features associated with triaxial γ-soft nuclei, represented by the O(6) symmetry, but are approaching a spherical structure, the U(5) symmetry, with increasing neutron number towards the N=82 shell closure. In 118Ru, hints of a shape transition in the ground state have been observed.

Original language	English
Article number	024301
Journal	Physical Review C - Nuclear Physics
Volume	88
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.88.024301
Publication status	Published - 1 Aug 2013

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Söderström, P. A., Lorusso, G., Watanabe, H., Nishimura, S., Doornenbal, P., Thiamova, G., Browne, F., Gey, G., Jung, H. S., Sumikama, T., Taprogge, J., Vajta, Z., Wu, J., Xu, Z. Y., Baba, H., Benzoni, G., Chae, K. Y., Crespi, F. C. L., Fukuda, N., ... Yoshinaga, K. (2013). Shape evolution in 116^,118Ru: Triaxiality and transition between the O(6) and U(5) dynamical symmetries. Physical Review C - Nuclear Physics, 88(2), Article 024301. https://doi.org/10.1103/PhysRevC.88.024301

@article{7584bae96fba4c1baed7c630db780481,

title = "Shape evolution in 116,118Ru: Triaxiality and transition between the O(6) and U(5) dynamical symmetries",

abstract = "116Ru and 118Ru have been studied via β-delayed γ-ray spectroscopy of nuclei produced in fragmentation reactions at the Radioactive Ion-Beam Factory (RIBF) facility. Level schemes with positive-parity states up to spin J=6 have been constructed. The results have been discussed in terms of the interacting boson model, the algebraic collective model, and total Routhian surfaces. We conclude that the very neutron-rich nuclei still show many features associated with triaxial γ-soft nuclei, represented by the O(6) symmetry, but are approaching a spherical structure, the U(5) symmetry, with increasing neutron number towards the N=82 shell closure. In 118Ru, hints of a shape transition in the ground state have been observed.",

author = "S{\"o}derstr{\"o}m, {P. A.} and G. Lorusso and H. Watanabe and S. Nishimura and P. Doornenbal and G. Thiamova and F. Browne and G. Gey and Jung, {H. S.} and T. Sumikama and J. Taprogge and Zs Vajta and J. Wu and Xu, {Z. Y.} and H. Baba and G. Benzoni and Chae, {K. Y.} and Crespi, {F. C.L.} and N. Fukuda and R. Gernh{\"a}user and N. Inabe and T. Isobe and A. Jungclaus and D. Kameda and Kim, {G. D.} and Kim, {Y. K.} and I. Kojouharov and Kondev, {F. G.} and T. Kubo and N. Kurz and Kwon, {Y. K.} and Lane, {G. J.} and Z. Li and A. Montaner-Piz{\'a} and K. Moschner and F. Naqvi and M. Niikura and H. Nishibata and A. Odahara and R. Orlandi and Z. Patel and Zs Podoly{\'a}k and H. Sakurai and H. Schaffner and Simpson, {G. S.} and K. Steiger and H. Suzuki and H. Takeda and A. Wendt and A. Yagi and K. Yoshinaga",

year = "2013",

month = aug,

day = "1",

doi = "10.1103/PhysRevC.88.024301",

language = "English",

volume = "88",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "2",

}

Söderström, PA, Lorusso, G, Watanabe, H, Nishimura, S, Doornenbal, P, Thiamova, G, Browne, F, Gey, G, Jung, HS, Sumikama, T, Taprogge, J, Vajta, Z, Wu, J, Xu, ZY, Baba, H, Benzoni, G, Chae, KY, Crespi, FCL, Fukuda, N, Gernhäuser, R, Inabe, N, Isobe, T, Jungclaus, A, Kameda, D, Kim, GD, Kim, YK, Kojouharov, I, Kondev, FG, Kubo, T, Kurz, N, Kwon, YK, Lane, GJ, Li, Z, Montaner-Pizá, A, Moschner, K, Naqvi, F, Niikura, M, Nishibata, H, Odahara, A, Orlandi, R, Patel, Z, Podolyák, Z, Sakurai, H, Schaffner, H, Simpson, GS, Steiger, K, Suzuki, H, Takeda, H, Wendt, A, Yagi, A & Yoshinaga, K 2013, 'Shape evolution in 116^,118Ru: Triaxiality and transition between the O(6) and U(5) dynamical symmetries', Physical Review C - Nuclear Physics, vol. 88, no. 2, 024301. https://doi.org/10.1103/PhysRevC.88.024301

TY - JOUR

T1 - Shape evolution in 116,118Ru

T2 - Triaxiality and transition between the O(6) and U(5) dynamical symmetries

AU - Söderström, P. A.

AU - Lorusso, G.

AU - Watanabe, H.

AU - Nishimura, S.

AU - Doornenbal, P.

AU - Thiamova, G.

AU - Browne, F.

AU - Gey, G.

AU - Jung, H. S.

AU - Sumikama, T.

AU - Taprogge, J.

AU - Vajta, Zs

AU - Wu, J.

AU - Xu, Z. Y.

AU - Baba, H.

AU - Benzoni, G.

AU - Chae, K. Y.

AU - Crespi, F. C.L.

AU - Fukuda, N.

AU - Gernhäuser, R.

AU - Inabe, N.

AU - Isobe, T.

AU - Jungclaus, A.

AU - Kameda, D.

AU - Kim, G. D.

AU - Kim, Y. K.

AU - Kojouharov, I.

AU - Kondev, F. G.

AU - Kubo, T.

AU - Kurz, N.

AU - Kwon, Y. K.

AU - Lane, G. J.

AU - Li, Z.

AU - Montaner-Pizá, A.

AU - Moschner, K.

AU - Naqvi, F.

AU - Niikura, M.

AU - Nishibata, H.

AU - Odahara, A.

AU - Orlandi, R.

AU - Patel, Z.

AU - Podolyák, Zs

AU - Sakurai, H.

AU - Schaffner, H.

AU - Simpson, G. S.

AU - Steiger, K.

AU - Suzuki, H.

AU - Takeda, H.

AU - Wendt, A.

AU - Yagi, A.

AU - Yoshinaga, K.

PY - 2013/8/1

Y1 - 2013/8/1

N2 - 116Ru and 118Ru have been studied via β-delayed γ-ray spectroscopy of nuclei produced in fragmentation reactions at the Radioactive Ion-Beam Factory (RIBF) facility. Level schemes with positive-parity states up to spin J=6 have been constructed. The results have been discussed in terms of the interacting boson model, the algebraic collective model, and total Routhian surfaces. We conclude that the very neutron-rich nuclei still show many features associated with triaxial γ-soft nuclei, represented by the O(6) symmetry, but are approaching a spherical structure, the U(5) symmetry, with increasing neutron number towards the N=82 shell closure. In 118Ru, hints of a shape transition in the ground state have been observed.

AB - 116Ru and 118Ru have been studied via β-delayed γ-ray spectroscopy of nuclei produced in fragmentation reactions at the Radioactive Ion-Beam Factory (RIBF) facility. Level schemes with positive-parity states up to spin J=6 have been constructed. The results have been discussed in terms of the interacting boson model, the algebraic collective model, and total Routhian surfaces. We conclude that the very neutron-rich nuclei still show many features associated with triaxial γ-soft nuclei, represented by the O(6) symmetry, but are approaching a spherical structure, the U(5) symmetry, with increasing neutron number towards the N=82 shell closure. In 118Ru, hints of a shape transition in the ground state have been observed.

UR - http://www.scopus.com/inward/record.url?scp=84883480940&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.88.024301

DO - 10.1103/PhysRevC.88.024301

M3 - Article

SN - 0556-2813

VL - 88

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 2

M1 - 024301

ER -

Shape evolution in 116^,118Ru: Triaxiality and transition between the O(6) and U(5) dynamical symmetries

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