Urban, W., Sieja, K., Materna, T., Czerwinski, M., Rzaca-Urban, T., Blanc, A., Jentschel, M., Mutti, P., Koster, U., Soldner, T., de France, G., Simpson, G. S., Ur, C. A., Bernards, C., Fransen, C., Jolie, J., Regis, J. -M., Thomas, T. and Warr, N. (2016). Low-spin structure of Br-86(35)51 and Kr-86(36)50 nuclei: The role of the g(7/2) neutron orbital. Phys. Rev. C, 94 (4). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9993

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Abstract

Low-spin excited levels in Br-86(35)51 and Kr-86(36)50, populated following beta(-) decay and the neutron-induced fission of U-235, were measured using the Lohengrin fission-fragment separator and the EXILL array of Ge detectors at the PF1B cold-neutron facility of the Institute Laue-Langevin Grenoble. Improved populations of excited levels in Br-86 remove inconsistencies existing in the literature on this nucleus. Directional-linear-polarization correlations, analyzed using newly developed formulas, as well as precise angular correlations allowed the unique 1(-) and 2(-) spin and parity assignments to the ground state of Br-86 and the 4016.3-keV level in Kr-86, respectively. Based on these results we propose that the Gamow-Teller beta(-) decays of Se-86 and Br-86 involve the nu g(7/2) -> pi g(9/2) transition in addition to the nu p(3/2) -> pi p(3/2) transition proposed earlier. In Kr-86 we have identified 1(1)(+), 2(3)(+), and 3(1)(+) levels, analogous to the mixed- symmetry states in Mo-94, which in Kr-86 are from proton excitations, only. Large-scale, shell-model calculations with refined interactions reproduce well excitations in Br-86 and Kr-86 and support our interpretations.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Urban, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sieja, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Materna, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Czerwinski, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rzaca-Urban, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blanc, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jentschel, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mutti, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Koster, U.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Soldner, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de France, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Simpson, G. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ur, C. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bernards, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fransen, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jolie, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Regis, J. -M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Thomas, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Warr, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-258125
DOI: 10.1103/PhysRevC.94.044328
Journal or Publication Title: Phys. Rev. C
Volume: 94
Number: 4
Date: 2016
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9993
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
MIXED-SYMMETRY STATES; GAMMA-RAY; SHELL-MODEL; DECAY; EXCITATIONS; ISOTOPES; ENERGYMultiple languages
Physics, NuclearMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/25812

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