γ -soft Ba 146 and the role of nonaxial shapes at N≈90

A. J. Mitchell; C. J. Lister; E. A. McCutchan; M. Albers; A. D. Ayangeakaa; P. F. Bertone; M. P. Carpenter; C. J. Chiara; P. Chowdhury; J. A. Clark; P. Copp; H. M. David; A. Y. Deo; B. DiGiovine; N. D'Olympia; R. Dungan; R. D. Harding; J. Harker; S. S. Hota; R. V.F. Janssens; F. G. Kondev; S. H. Liu; A. V. Ramayya; J. Rissanen; G. Savard; D. Seweryniak; R. Shearman; A. A. Sonzogni; S. L. Tabor; W. B. Walters; E. Wang; S. Zhu

doi:10.1103/PhysRevC.93.014306

γ -soft Ba 146 and the role of nonaxial shapes at N≈90

A. J. Mitchell, C. J. Lister, E. A. McCutchan, M. Albers, A. D. Ayangeakaa, P. F. Bertone, M. P. Carpenter, C. J. Chiara, P. Chowdhury, J. A. Clark, P. Copp, H. M. David, A. Y. Deo, B. DiGiovine, N. D'Olympia, R. Dungan, R. D. Harding, J. Harker, S. S. Hota, R. V.F. JanssensF. G. Kondev, S. H. Liu, A. V. Ramayya, J. Rissanen, G. Savard, D. Seweryniak, R. Shearman, A. A. Sonzogni, S. L. Tabor, W. B. Walters, E. Wang, S. Zhu

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

16 Citations (Scopus)

Abstract

Low-spin states in the neutron-rich, N=90 nuclide Ba146 were populated following β decay of Cs146, with the goal of clarifying the development of deformation in barium isotopes through delineation of their nonyrast structures. Fission fragments of Cs146 were extracted from a 1.7-Ci Cf252 source and mass selected using the CAlifornium Rare Ion Breeder Upgrade (CARIBU) facility. Low-energy ions were deposited at the center of a box of thin β detectors, surrounded by a highly efficient high-purity Ge array. The new Ba146 decay scheme now contains 31 excited levels extending up to ∼2.5 MeV excitation energy, double what was previously known. These data are compared to predictions from the interacting boson approximation (IBA) model. It appears that the abrupt shape change found at N=90 in Sm and Gd is much more gradual in Ba and Ce, due to an enhanced role of the γ degree of freedom.

Original language	English
Article number	014306
Journal	Physical Review C
Volume	93
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.93.014306
Publication status	Published - 12 Jan 2016

Access to Document

10.1103/PhysRevC.93.014306

Cite this

Mitchell, A. J., Lister, C. J., McCutchan, E. A., Albers, M., Ayangeakaa, A. D., Bertone, P. F., Carpenter, M. P., Chiara, C. J., Chowdhury, P., Clark, J. A., Copp, P., David, H. M., Deo, A. Y., DiGiovine, B., D'Olympia, N., Dungan, R., Harding, R. D., Harker, J., Hota, S. S., ... Zhu, S. (2016). γ -soft Ba 146 and the role of nonaxial shapes at N≈90. Physical Review C, 93(1), Article 014306. https://doi.org/10.1103/PhysRevC.93.014306

@article{5cefafb2f8ee4964b9c6762394417e46,

title = "γ -soft Ba 146 and the role of nonaxial shapes at N≈90",

abstract = "Low-spin states in the neutron-rich, N=90 nuclide Ba146 were populated following β decay of Cs146, with the goal of clarifying the development of deformation in barium isotopes through delineation of their nonyrast structures. Fission fragments of Cs146 were extracted from a 1.7-Ci Cf252 source and mass selected using the CAlifornium Rare Ion Breeder Upgrade (CARIBU) facility. Low-energy ions were deposited at the center of a box of thin β detectors, surrounded by a highly efficient high-purity Ge array. The new Ba146 decay scheme now contains 31 excited levels extending up to ∼2.5 MeV excitation energy, double what was previously known. These data are compared to predictions from the interacting boson approximation (IBA) model. It appears that the abrupt shape change found at N=90 in Sm and Gd is much more gradual in Ba and Ce, due to an enhanced role of the γ degree of freedom.",

author = "Mitchell, {A. J.} and Lister, {C. J.} and McCutchan, {E. A.} and M. Albers and Ayangeakaa, {A. D.} and Bertone, {P. F.} and Carpenter, {M. P.} and Chiara, {C. J.} and P. Chowdhury and Clark, {J. A.} and P. Copp and David, {H. M.} and Deo, {A. Y.} and B. DiGiovine and N. D'Olympia and R. Dungan and Harding, {R. D.} and J. Harker and Hota, {S. S.} and Janssens, {R. V.F.} and Kondev, {F. G.} and Liu, {S. H.} and Ramayya, {A. V.} and J. Rissanen and G. Savard and D. Seweryniak and R. Shearman and Sonzogni, {A. A.} and Tabor, {S. L.} and Walters, {W. B.} and E. Wang and S. Zhu",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = jan,

day = "12",

doi = "10.1103/PhysRevC.93.014306",

language = "English",

volume = "93",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "1",

}

Mitchell, AJ, Lister, CJ, McCutchan, EA, Albers, M, Ayangeakaa, AD, Bertone, PF, Carpenter, MP, Chiara, CJ, Chowdhury, P, Clark, JA, Copp, P, David, HM, Deo, AY, DiGiovine, B, D'Olympia, N, Dungan, R, Harding, RD, Harker, J, Hota, SS, Janssens, RVF, Kondev, FG, Liu, SH, Ramayya, AV, Rissanen, J, Savard, G, Seweryniak, D, Shearman, R, Sonzogni, AA, Tabor, SL, Walters, WB, Wang, E & Zhu, S 2016, 'γ -soft Ba 146 and the role of nonaxial shapes at N≈90', Physical Review C, vol. 93, no. 1, 014306. https://doi.org/10.1103/PhysRevC.93.014306

TY - JOUR

T1 - γ -soft Ba 146 and the role of nonaxial shapes at N≈90

AU - Mitchell, A. J.

AU - Lister, C. J.

AU - McCutchan, E. A.

AU - Albers, M.

AU - Ayangeakaa, A. D.

AU - Bertone, P. F.

AU - Carpenter, M. P.

AU - Chiara, C. J.

AU - Chowdhury, P.

AU - Clark, J. A.

AU - Copp, P.

AU - David, H. M.

AU - Deo, A. Y.

AU - DiGiovine, B.

AU - D'Olympia, N.

AU - Dungan, R.

AU - Harding, R. D.

AU - Harker, J.

AU - Hota, S. S.

AU - Janssens, R. V.F.

AU - Kondev, F. G.

AU - Liu, S. H.

AU - Ramayya, A. V.

AU - Rissanen, J.

AU - Savard, G.

AU - Seweryniak, D.

AU - Shearman, R.

AU - Sonzogni, A. A.

AU - Tabor, S. L.

AU - Walters, W. B.

AU - Wang, E.

AU - Zhu, S.

PY - 2016/1/12

Y1 - 2016/1/12

N2 - Low-spin states in the neutron-rich, N=90 nuclide Ba146 were populated following β decay of Cs146, with the goal of clarifying the development of deformation in barium isotopes through delineation of their nonyrast structures. Fission fragments of Cs146 were extracted from a 1.7-Ci Cf252 source and mass selected using the CAlifornium Rare Ion Breeder Upgrade (CARIBU) facility. Low-energy ions were deposited at the center of a box of thin β detectors, surrounded by a highly efficient high-purity Ge array. The new Ba146 decay scheme now contains 31 excited levels extending up to ∼2.5 MeV excitation energy, double what was previously known. These data are compared to predictions from the interacting boson approximation (IBA) model. It appears that the abrupt shape change found at N=90 in Sm and Gd is much more gradual in Ba and Ce, due to an enhanced role of the γ degree of freedom.

AB - Low-spin states in the neutron-rich, N=90 nuclide Ba146 were populated following β decay of Cs146, with the goal of clarifying the development of deformation in barium isotopes through delineation of their nonyrast structures. Fission fragments of Cs146 were extracted from a 1.7-Ci Cf252 source and mass selected using the CAlifornium Rare Ion Breeder Upgrade (CARIBU) facility. Low-energy ions were deposited at the center of a box of thin β detectors, surrounded by a highly efficient high-purity Ge array. The new Ba146 decay scheme now contains 31 excited levels extending up to ∼2.5 MeV excitation energy, double what was previously known. These data are compared to predictions from the interacting boson approximation (IBA) model. It appears that the abrupt shape change found at N=90 in Sm and Gd is much more gradual in Ba and Ce, due to an enhanced role of the γ degree of freedom.

UR - http://www.scopus.com/inward/record.url?scp=84955085763&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.93.014306

DO - 10.1103/PhysRevC.93.014306

M3 - Article

SN - 2469-9985

VL - 93

JO - Physical Review C

JF - Physical Review C

IS - 1

M1 - 014306

ER -

γ -soft Ba 146 and the role of nonaxial shapes at N≈90

Abstract

Access to Document

Other files and links

Fingerprint

Cite this