Identification of the $\ensuremath{\nu}7/{2}^{+}[404]$ band in neutron-rich $^{109}\mathrm{Ru}$

Identification of the $ν 7 / 2^{+} [404]$ band in neutron-rich ${}^{109}{Ru}$

H. B. Ding, S. J. Zhu, J. H. Hamilton, A. V. Ramayya, J. K. Hwang, K. Li, S. H. Liu, Y. X. Luo, J. O. Rasmussen, C. T. Goodin, I. Y. Lee, A. V. Daniel, G. M. Ter-Akopian, J. G. Wang, X. L. Che, L. Gu, and W. C. Ma

Phys. Rev. C 77, 057302 – Published 29 May 2008

Abstract

The high-spin spectroscopy of neutron-rich ${}^{109}{Ru}$ is studied by measuring the prompt γ rays from the spontaneous fission fragments of ${}^{252}{Cf}$ with 102 Compton-suppressed Ge detectors in the Gammasphere detector array. Previous band structures are confirmed and the ground state band is extended. A positive parity band based on a 332.5 keV level is newly identified. This band is proposed as a single-neutron excitation band built on the $7 / 2^{+} [404]$ Nilsson orbital. Some band structural characteristics are discussed.

Received 15 February 2008

DOI:https://doi.org/10.1103/PhysRevC.77.057302

Authors & Affiliations

H. B. Ding¹, S. J. Zhu^1,2,3,*, J. H. Hamilton², A. V. Ramayya², J. K. Hwang², K. Li², S. H. Liu², Y. X. Luo^2,4, J. O. Rasmussen⁴, C. T. Goodin², I. Y. Lee⁴, A. V. Daniel^2,3,5, G. M. Ter-Akopian^2,5, J. G. Wang¹, X. L. Che¹, L. Gu¹, and W. C. Ma⁶

¹Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China
²Department of Physics, Vanderbilt University, Nashville, Tennessee 37235, USA
³Joint Institute for Heavy Ion Research, Oak Ridge, Tennessee 37831, USA
⁴Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
⁵Flerov Laboratory of Nuclear Reactions, JINR, Dubna, Russia
⁶Mississippi State University, Drawer 5167, Mississippi State, Mississippi 39762, USA

^*zhushj@mail.tsinghua.edu.cn

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Vol. 77, Iss. 5 — May 2008

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Physical Review C

covering nuclear physics

Identification of the $ν 7 / 2^{+} [404]$ band in neutron-rich ${}^{109}{Ru}$

H. B. Ding, S. J. Zhu, J. H. Hamilton, A. V. Ramayya, J. K. Hwang, K. Li, S. H. Liu, Y. X. Luo, J. O. Rasmussen, C. T. Goodin, I. Y. Lee, A. V. Daniel, G. M. Ter-Akopian, J. G. Wang, X. L. Che, L. Gu, and W. C. Ma

Phys. Rev. C 77, 057302 – Published 29 May 2008

Abstract

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Physical Review C

covering nuclear physics

Identification of the ν7/2+[404] band in neutron-rich Ru109

H. B. Ding, S. J. Zhu, J. H. Hamilton, A. V. Ramayya, J. K. Hwang, K. Li, S. H. Liu, Y. X. Luo, J. O. Rasmussen, C. T. Goodin, I. Y. Lee, A. V. Daniel, G. M. Ter-Akopian, J. G. Wang, X. L. Che, L. Gu, and W. C. Ma

Phys. Rev. C 77, 057302 – Published 29 May 2008

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Identification of the $ν 7 / 2^{+} [404]$ band in neutron-rich ${}^{109}{Ru}$