Low energy structure of even-even Ni isotopes close to 78Ni

C. Mazzocchi; R. Grzywacz; J. C. Batchelder; C. R. Bingham; D. Fong; J. H. Hamilton; J. K. Hwang; M. Karny; W. Krolas; S. N. Liddick; A. F. Lisetskiy; A. C. Morton; P. F. Mantica; W. F. Mueller; K. P. Rykaczewski; M. Steiner; A. Stolz; J. A. Winger

doi:10.1016/j.physletb.2005.07.006

Low energy structure of even-even Ni isotopes close to ⁷⁸Ni

C. Mazzocchi
, R. Grzywacz
, J. C. Batchelder
, C. R. Bingham
, D. Fong
, J. H. Hamilton
, J. K. Hwang
, M. Karny
, W. Krolas
, S. N. Liddick
, A. F. Lisetskiy
, A. C. Morton
, P. F. Mantica
, W. F. Mueller
, K. P. Rykaczewski
, M. Steiner
, A. Stolz
, J. A. Winger

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

72 Scopus citations

Abstract

The structure of magic neutron-rich nickel isotopes produced in the fragmentation of a 140 AMeV ⁸⁶Kr beam was investigated. For the first time four gamma transitions were assigned to the decay of the I ^π=8⁺, T_1/2=590_-110⁺¹⁸⁰ ns isomer, thus establishing the 0⁺-2⁺-4 ⁺-6⁺-8⁺ ground-state band in ⁷⁶Ni. The previously unknown 2⁺ and 4⁺ levels belonging to the ground-state band in ⁷⁴Ni were identified in the β decay of ⁷⁴Co (T_1/2=30(3) ms). The decay properties of ⁷²Co → ⁷²Ni were verified and confirmed on the basis of γ-γ coincidence data. The relevance of the measured level properties for the magicity of ⁷⁸Ni is analyzed with the help of advanced shell-model predictions.

Original language	English
Pages (from-to)	45-54
Number of pages	10
Journal	Physics Letters B
Volume	622
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physletb.2005.07.006
State	Published - Aug 25 2005

Funding

This work was supported in part by the NSF Grant PHY-01-10253 (MichiganSU) and by the US Department of Energy Grants DE-FG02-96ER40983 (UT), DE-ACO5-00OR22725(ORNL), DE-AC05-76OR00033 (UNIRIB), DE-FG02-96ER-41006 (MississippiSU) and DE-FG05-88ER40407 (Vanderbilt).

Keywords

Gamma-ray transitions
Isomeric decay
Level energies
β decay

Access to Document

10.1016/j.physletb.2005.07.006

Cite this

Mazzocchi, C., Grzywacz, R., Batchelder, J. C., Bingham, C. R., Fong, D., Hamilton, J. H., Hwang, J. K., Karny, M., Krolas, W., Liddick, S. N., Lisetskiy, A. F., Morton, A. C., Mantica, P. F., Mueller, W. F., Rykaczewski, K. P., Steiner, M., Stolz, A., & Winger, J. A. (2005). Low energy structure of even-even Ni isotopes close to ⁷⁸Ni. Physics Letters B, 622(1-2), 45-54. https://doi.org/10.1016/j.physletb.2005.07.006

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title = "Low energy structure of even-even Ni isotopes close to 78Ni",

abstract = "The structure of magic neutron-rich nickel isotopes produced in the fragmentation of a 140 AMeV 86Kr beam was investigated. For the first time four gamma transitions were assigned to the decay of the I π=8+, T1/2=590-110+180 ns isomer, thus establishing the 0+-2+-4 +-6+-8+ ground-state band in 76Ni. The previously unknown 2+ and 4+ levels belonging to the ground-state band in 74Ni were identified in the β decay of 74Co (T1/2=30(3) ms). The decay properties of 72Co → 72Ni were verified and confirmed on the basis of γ-γ coincidence data. The relevance of the measured level properties for the magicity of 78Ni is analyzed with the help of advanced shell-model predictions.",

keywords = "Gamma-ray transitions, Isomeric decay, Level energies, β decay",

author = "C. Mazzocchi and R. Grzywacz and Batchelder, \{J. C.\} and Bingham, \{C. R.\} and D. Fong and Hamilton, \{J. H.\} and Hwang, \{J. K.\} and M. Karny and W. Krolas and Liddick, \{S. N.\} and Lisetskiy, \{A. F.\} and Morton, \{A. C.\} and Mantica, \{P. F.\} and Mueller, \{W. F.\} and Rykaczewski, \{K. P.\} and M. Steiner and A. Stolz and Winger, \{J. A.\}",

year = "2005",

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doi = "10.1016/j.physletb.2005.07.006",

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Mazzocchi, C, Grzywacz, R, Batchelder, JC, Bingham, CR, Fong, D, Hamilton, JH, Hwang, JK, Karny, M, Krolas, W, Liddick, SN, Lisetskiy, AF, Morton, AC, Mantica, PF, Mueller, WF, Rykaczewski, KP, Steiner, M, Stolz, A & Winger, JA 2005, 'Low energy structure of even-even Ni isotopes close to ⁷⁸Ni', Physics Letters B, vol. 622, no. 1-2, pp. 45-54. https://doi.org/10.1016/j.physletb.2005.07.006

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T1 - Low energy structure of even-even Ni isotopes close to 78Ni

AU - Mazzocchi, C.

AU - Grzywacz, R.

AU - Batchelder, J. C.

AU - Bingham, C. R.

AU - Fong, D.

AU - Hamilton, J. H.

AU - Hwang, J. K.

AU - Karny, M.

AU - Krolas, W.

AU - Liddick, S. N.

AU - Lisetskiy, A. F.

AU - Morton, A. C.

AU - Mantica, P. F.

AU - Mueller, W. F.

AU - Rykaczewski, K. P.

AU - Steiner, M.

AU - Stolz, A.

AU - Winger, J. A.

PY - 2005/8/25

Y1 - 2005/8/25

N2 - The structure of magic neutron-rich nickel isotopes produced in the fragmentation of a 140 AMeV 86Kr beam was investigated. For the first time four gamma transitions were assigned to the decay of the I π=8+, T1/2=590-110+180 ns isomer, thus establishing the 0+-2+-4 +-6+-8+ ground-state band in 76Ni. The previously unknown 2+ and 4+ levels belonging to the ground-state band in 74Ni were identified in the β decay of 74Co (T1/2=30(3) ms). The decay properties of 72Co → 72Ni were verified and confirmed on the basis of γ-γ coincidence data. The relevance of the measured level properties for the magicity of 78Ni is analyzed with the help of advanced shell-model predictions.

AB - The structure of magic neutron-rich nickel isotopes produced in the fragmentation of a 140 AMeV 86Kr beam was investigated. For the first time four gamma transitions were assigned to the decay of the I π=8+, T1/2=590-110+180 ns isomer, thus establishing the 0+-2+-4 +-6+-8+ ground-state band in 76Ni. The previously unknown 2+ and 4+ levels belonging to the ground-state band in 74Ni were identified in the β decay of 74Co (T1/2=30(3) ms). The decay properties of 72Co → 72Ni were verified and confirmed on the basis of γ-γ coincidence data. The relevance of the measured level properties for the magicity of 78Ni is analyzed with the help of advanced shell-model predictions.

KW - Gamma-ray transitions

KW - Isomeric decay

KW - Level energies

KW - β decay

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