Universität zu Köln

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:	Creators Email ORCID ORCID Put Code Urban, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sieja, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Materna, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Czerwinski, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rzaca-Urban, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Blanc, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jentschel, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mutti, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Koster, U. UNSPECIFIED UNSPECIFIED UNSPECIFIED Soldner, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED de France, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Simpson, G. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ur, C. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bernards, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fransen, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jolie, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Regis, J. -M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Thomas, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Warr, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED
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:	Keywords Language MIXED-SYMMETRY STATES; GAMMA-RAY; SHELL-MODEL; DECAY; EXCITATIONS; ISOTOPES; ENERGY Multiple languages Physics, Nuclear Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/25812