Neutron-proton multiplets in the nucleus Br 88

M. Czerwiński, T. Rząca-Urban, W. Urban, P. Bączyk, K. Sieja, B. Nyakó, J. Tímár, I. Kuti, T. G. Tornyi, L. Atanasova, A. Blanc, M. Jentschel, P. Mutti, U. Köster, T. Soldner, G. De France, G. S. Simpson, C. A. Ur

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Abstract

Medium spin excited levels in Br88 populated in fission of U235 induced by neutrons have been observed for the first time. The measurement of γ radiation following fission has been performed using the EXILL array of Ge detectors at the cold-neutron beam facility PF1B of the Institut Laue-Langevin (ILL), Grenoble. The ground state of Br88 is proposed to be 1-, changing the adopted (2-) value. The low-energy, newly observed levels are members of the πp3/2ν(d5/2)3 and πf5/2-1ν(d5/2)3 multiplets. A triplet of yrast levels observed at around 2 MeV is interpreted as being due to coupling of the g9/2 proton to the (d5/2)3, seniority 3 multiplet, supporting the presence of collective effects in Br88. The position of the g9/2 proton intruder in the Ni78 core is determined at 5.7 MeV above the f5/2 proton level. Shell-model calculations predict the same proton-neutron excitations proposed in Br88.

Original languageEnglish
Article number014328
JournalPhysical Review C - Nuclear Physics
Volume92
Issue number1
DOIs
Publication statusPublished - Jul 30 2015

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fine structure
neutrons
nuclei
protons
fission
cold neutrons
neutron beams
ground state
detectors
radiation
excitation
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Czerwiński, M., Rząca-Urban, T., Urban, W., Bączyk, P., Sieja, K., Nyakó, B., ... Ur, C. A. (2015). Neutron-proton multiplets in the nucleus Br 88. Physical Review C - Nuclear Physics, 92(1), [014328]. https://doi.org/10.1103/PhysRevC.92.014328

Neutron-proton multiplets in the nucleus Br 88. / Czerwiński, M.; Rząca-Urban, T.; Urban, W.; Bączyk, P.; Sieja, K.; Nyakó, B.; Tímár, J.; Kuti, I.; Tornyi, T. G.; Atanasova, L.; Blanc, A.; Jentschel, M.; Mutti, P.; Köster, U.; Soldner, T.; De France, G.; Simpson, G. S.; Ur, C. A.

In: Physical Review C - Nuclear Physics, Vol. 92, No. 1, 014328, 30.07.2015.

Research output: Contribution to journalArticle

Czerwiński, M, Rząca-Urban, T, Urban, W, Bączyk, P, Sieja, K, Nyakó, B, Tímár, J, Kuti, I, Tornyi, TG, Atanasova, L, Blanc, A, Jentschel, M, Mutti, P, Köster, U, Soldner, T, De France, G, Simpson, GS & Ur, CA 2015, 'Neutron-proton multiplets in the nucleus Br 88', Physical Review C - Nuclear Physics, vol. 92, no. 1, 014328. https://doi.org/10.1103/PhysRevC.92.014328
Czerwiński M, Rząca-Urban T, Urban W, Bączyk P, Sieja K, Nyakó B et al. Neutron-proton multiplets in the nucleus Br 88. Physical Review C - Nuclear Physics. 2015 Jul 30;92(1). 014328. https://doi.org/10.1103/PhysRevC.92.014328
Czerwiński, M. ; Rząca-Urban, T. ; Urban, W. ; Bączyk, P. ; Sieja, K. ; Nyakó, B. ; Tímár, J. ; Kuti, I. ; Tornyi, T. G. ; Atanasova, L. ; Blanc, A. ; Jentschel, M. ; Mutti, P. ; Köster, U. ; Soldner, T. ; De France, G. ; Simpson, G. S. ; Ur, C. A. / Neutron-proton multiplets in the nucleus Br 88. In: Physical Review C - Nuclear Physics. 2015 ; Vol. 92, No. 1.
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