Iskra, L. W., Fornal, B., Leoni, S., Bocchi, G., Petrovici, A., Porzio, C., Blanc, A., De France, G., Jentschel, M., Koster, U., Mutti, P., Regis, J. -M., Simpson, G., Soldner, T., Ur, C. A., Urban, W., Bazzacco, D., Benzoni, G., Bottoni, S., Bruce, A., Cieplicka-Orynczak, N., Crespi, F. C. L., Fraile, L. M., Korten, W., Kroll, T., Lalkovski, S., Marginean, N., Michelagnoli, C., Melon, B., Mengoni, D., Million, B., Nannini, A., Napoli, D., Podolyak, Zs., Regan, P. H. and Szpak, B. (2017). New isomer in Y-96 marking the onset of deformation at N=57. EPL, 117 (1). MULHOUSE: EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY. ISSN 1286-4854

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Abstract

The level scheme of Y-96 was significantly extended and a new 201 ns isomer was located at 1655 keV excitation energy, with spin-parity assignment of 5(+/-) or 6(-). The isomer decays to spherical low-spin structure by transitions with large hindrance and is fed by a short cascade which resembles the beginning of a rotational band. This is in analogy with the feeding and decay pattern of the 4(-) isomer in Y-98, here confirmed, by lifetime analysis, as a bandhead of a rotational structure with sizable deformation. It is suggested that the new isomer in Y-96 arises from a shape change between deformed and spherical configurations, which indicates the appearance of deformation already at N = 57 in the yttrium chain. The experimental findings for Y-96 are strengthened by theoretical calculations based on the complex Excited Vampir model.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Iskra, L. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fornal, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Leoni, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bocchi, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Petrovici, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Porzio, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blanc, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
De France, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jentschel, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Koster, U.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mutti, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Regis, J. -M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Simpson, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Soldner, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ur, C. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Urban, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bazzacco, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Benzoni, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bottoni, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bruce, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cieplicka-Orynczak, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Crespi, F. C. L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fraile, L. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Korten, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kroll, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lalkovski, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marginean, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Michelagnoli, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Melon, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mengoni, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Million, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nannini, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Napoli, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Podolyak, Zs.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Regan, P. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Szpak, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-246973
DOI: 10.1209/0295-5075/117/12001
Journal or Publication Title: EPL
Volume: 117
Number: 1
Date: 2017
Publisher: EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
Place of Publication: MULHOUSE
ISSN: 1286-4854
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
FISSION FRAGMENTS; EXCITED-STATES; NUCLEI; SPECTROMETER; ARRAY; SPINMultiple languages
Physics, MultidisciplinaryMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/24697

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