Possible shears bands in $^{204}\mathrm{At}$ and $^{206}\mathrm{Fr}$, and identification of excited states in $^{205,207}\mathrm{Fr}$

Possible shears bands in ${}^{204}{At}$ and ${}^{206}{Fr}$ , and identification of excited states in ${}^{205, 207}{Fr}$

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, and S. Zhu

Phys. Rev. C 78, 054319 – Published 25 November 2008

Abstract

Neutron-deficient astatine and francium nuclei were produced in the reaction $^{30} Si +^{181} Ta \to^{211} {Fr}^{*}$ 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 ${}^{205, 207}{Fr}$ , as well as sequences of low-energy transitions between high-spin states in ${}^{204}{At}$ and ${}^{206}{Fr}$ . 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.

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Received 22 September 2008
Corrected 1 December 2008

DOI:https://doi.org/10.1103/PhysRevC.78.054319

Corrections

1 December 2008

Erratum

Publisher's Note: Possible shears bands in ${}^{204}{At}$ and ${}^{206}{Fr}$ , and identification of excited states in ${}^{205, 207}{Fr}$ [Phys. Rev. C 78, 054319 (2008)]

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, and S. Zhu

Phys. Rev. C 78, 069901 (2008)

Authors & Affiliations

D. J. Hartley and E. P. Seyfried

Department of Physics, U.S. Naval Academy, Annapolis, Maryland 21402, USA

W. Reviol, D. G. Sarantites, C. J. Chiara^*, and O. L. Pechenaya^†

Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA

K. Hauschild and A. Lopez-Martens

CSNSM, IN2P3-CNRS, F-91405 Orsay Campus, France

M. P. Carpenter, R. V. F. Janssens, D. Seweryniak, and S. Zhu

Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

^*Present address: Nuclear Engineering Division, Argonne National Laboratory, Argonne, IL 60439, USA.
^†Present address: Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO 63130, USA.

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Vol. 78, Iss. 5 — November 2008

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Physical Review C

covering nuclear physics

Possible shears bands in ${}^{204}{At}$ and ${}^{206}{Fr}$ , and identification of excited states in ${}^{205, 207}{Fr}$

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, and S. Zhu

Phys. Rev. C 78, 054319 – Published 25 November 2008

Abstract

Corrections

Erratum

Publisher's Note: Possible shears bands in ${}^{204}{At}$ and ${}^{206}{Fr}$ , and identification of excited states in ${}^{205, 207}{Fr}$ [Phys. Rev. C 78, 054319 (2008)]

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, and S. Zhu

Phys. Rev. C 78, 069901 (2008)

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Physical Review C

covering nuclear physics

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, and S. Zhu

Phys. Rev. C 78, 054319 – Published 25 November 2008

Abstract

Corrections

Erratum

Publisher's Note: Possible shears bands in At204 and Fr206, and identification of excited states in Fr205,207 [Phys. Rev. C 78, 054319 (2008)]

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, and S. Zhu

Phys. Rev. C 78, 069901 (2008)

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Possible shears bands in ${}^{204}{At}$ and ${}^{206}{Fr}$ , and identification of excited states in ${}^{205, 207}{Fr}$

Publisher's Note: Possible shears bands in ${}^{204}{At}$ and ${}^{206}{Fr}$ , and identification of excited states in ${}^{205, 207}{Fr}$ [Phys. Rev. C 78, 054319 (2008)]