Possible shears bands in At204 and Fr206, and identification of excited states in Fr205,207

D. J. Hartley; E. P. Seyfried; W. Reviol; D. G. Sarantites; C. J. Chiara; O. L. Pechenaya; K. Hauschild; A. Lopez-Martens; M. P. Carpenter; R. V.F. Janssens; D. Seweryniak; S. Zhu

doi:10.1103/PhysRevC.78.054319

Possible shears bands in At204 and Fr206, and identification of excited states in Fr205,207

D. J. Hartley, E. P. Seyfried, W. Reviol, D. G. Sarantites, C. J. Chiara, O. L. Pechenaya, K. Hauschild, A. Lopez-Martens, M. P. Carpenter, R. V.F. Janssens, D. Seweryniak, S. Zhu

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Abstract

Neutron-deficient astatine and francium nuclei were produced in the reaction 30Si+181Ta→211Fr* at 152 MeV. The evaporation residues from this very fissile system were selected with the HERCULES-II detector system and residue-gated γ rays were measured with Gammasphere. Excited states were observed for the first time in Fr205,207, as well as sequences of low-energy transitions between high-spin states in At204 and Fr206. These latter structures have properties similar to those associated with magnetic rotation (shears bands) in lead nuclei. Comparisons with established shears bands are presented and prospects for the magnetic-rotation phenomenon near the predicted N=120 "magic" number are explored.

Original language	English
Article number	054319
Journal	Physical Review C - Nuclear Physics
Volume	78
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.78.054319
State	Published - Nov 25 2008

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Hartley, D. J., Seyfried, E. P., Reviol, W., Sarantites, D. G., Chiara, C. J., Pechenaya, O. L., Hauschild, K., Lopez-Martens, A., Carpenter, M. P., Janssens, R. V. F., Seweryniak, D., & Zhu, S. (2008). Possible shears bands in At204 and Fr206, and identification of excited states in Fr205,207. Physical Review C - Nuclear Physics, 78(5), Article 054319. https://doi.org/10.1103/PhysRevC.78.054319

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title = "Possible shears bands in At204 and Fr206, and identification of excited states in Fr205,207",

abstract = "Neutron-deficient astatine and francium nuclei were produced in the reaction 30Si+181Ta→211Fr* at 152 MeV. The evaporation residues from this very fissile system were selected with the HERCULES-II detector system and residue-gated γ rays were measured with Gammasphere. Excited states were observed for the first time in Fr205,207, as well as sequences of low-energy transitions between high-spin states in At204 and Fr206. These latter structures have properties similar to those associated with magnetic rotation (shears bands) in lead nuclei. Comparisons with established shears bands are presented and prospects for the magnetic-rotation phenomenon near the predicted N=120 {"}magic{"} number are explored.",

author = "Hartley, {D. J.} and Seyfried, {E. P.} and W. Reviol and Sarantites, {D. G.} and Chiara, {C. J.} and Pechenaya, {O. L.} and K. Hauschild and A. Lopez-Martens and Carpenter, {M. P.} and Janssens, {R. V.F.} and D. Seweryniak and S. Zhu",

year = "2008",

month = nov,

day = "25",

doi = "10.1103/PhysRevC.78.054319",

language = "English",

volume = "78",

journal = "Physical Review C - Nuclear Physics",

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Hartley, DJ, Seyfried, EP, Reviol, W, Sarantites, DG, Chiara, CJ, Pechenaya, OL, Hauschild, K, Lopez-Martens, A, Carpenter, MP, Janssens, RVF, Seweryniak, D & Zhu, S 2008, 'Possible shears bands in At204 and Fr206, and identification of excited states in Fr205,207', Physical Review C - Nuclear Physics, vol. 78, no. 5, 054319. https://doi.org/10.1103/PhysRevC.78.054319

TY - JOUR

T1 - Possible shears bands in At204 and Fr206, and identification of excited states in Fr205,207

AU - Hartley, D. J.

AU - Seyfried, E. P.

AU - Reviol, W.

AU - Sarantites, D. G.

AU - Chiara, C. J.

AU - Pechenaya, O. L.

AU - Hauschild, K.

AU - Lopez-Martens, A.

AU - Carpenter, M. P.

AU - Janssens, R. V.F.

AU - Seweryniak, D.

AU - Zhu, S.

PY - 2008/11/25

Y1 - 2008/11/25

N2 - Neutron-deficient astatine and francium nuclei were produced in the reaction 30Si+181Ta→211Fr* at 152 MeV. The evaporation residues from this very fissile system were selected with the HERCULES-II detector system and residue-gated γ rays were measured with Gammasphere. Excited states were observed for the first time in Fr205,207, as well as sequences of low-energy transitions between high-spin states in At204 and Fr206. These latter structures have properties similar to those associated with magnetic rotation (shears bands) in lead nuclei. Comparisons with established shears bands are presented and prospects for the magnetic-rotation phenomenon near the predicted N=120 "magic" number are explored.

AB - Neutron-deficient astatine and francium nuclei were produced in the reaction 30Si+181Ta→211Fr* at 152 MeV. The evaporation residues from this very fissile system were selected with the HERCULES-II detector system and residue-gated γ rays were measured with Gammasphere. Excited states were observed for the first time in Fr205,207, as well as sequences of low-energy transitions between high-spin states in At204 and Fr206. These latter structures have properties similar to those associated with magnetic rotation (shears bands) in lead nuclei. Comparisons with established shears bands are presented and prospects for the magnetic-rotation phenomenon near the predicted N=120 "magic" number are explored.

UR - http://www.scopus.com/inward/record.url?scp=57049125182&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.78.054319

DO - 10.1103/PhysRevC.78.054319

M3 - Article

AN - SCOPUS:57049125182

SN - 0556-2813

VL - 78

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 5

M1 - 054319

ER -

Possible shears bands in At204 and Fr206, and identification of excited states in Fr205,207

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