Stoyanova, M., Rainovski, G., Jolie, J., Pietralla, N., Blazhev, A., Beckers, M., Dewald, A., Djongolov, M., Esmaylzadeh, A., Fransen, C., Gerhard, L. M., Gladnishki, K. A., Herb, S., John, P. R., Karayonchev, V, Keatings, J. M., Kern, R., Knafla, L., Kocheva, D., Kornwebel, L., Kroell, Th, Ley, M., Mashtakov, K. M., Mueller-Gatermann, C., Regis, J. M., Scheck, M., Schomacker, K., Sinclair, J., Spagnoletti, P., Suerder, C., Warr, N., Werner, V and Wiederhold, J. (2019). Lifetimes of the 4(1)(+) states of Po-206 and Po-204: A study of the transition from noncollective seniority-like mode to collectivity. Phys. Rev. C, 100 (6). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9993

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Abstract

Low-lying yrast states of Po-204 and Po-206 were investigated by the gamma-gamma fast timing technique with LaBr3(Ce) detectors. Excited states of these nuclei were populated in the Au-197(B-11, 4n)Po-204 and the Pt-198(C-12, 4n )Po-206 fusion-evaporation reactions, respectively. The beams were delivered by the FN-Tandem accelerator at the University of Cologne. The lifetimes of the 4(1)(+) states of both nuclei were measured, along with an upper lifetime limit for the 2(1)(+) state of Po-204. A comparison between the derived B(E2; 4(1)(+) -> 2(1)(+)) values and results from simplified empirical two-state mixing calculations suggests that for the 4(1)(+) states of even-even polonium isotopes the transition from single-particle mode at N = 126 to collective mode, when reducing the number of neutrons, occurs above N = 122.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Stoyanova, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rainovski, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jolie, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pietralla, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blazhev, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Beckers, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dewald, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Djongolov, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Esmaylzadeh, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fransen, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gerhard, L. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gladnishki, K. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Herb, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
John, P. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Karayonchev, VUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Keatings, J. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kern, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knafla, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kocheva, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kornwebel, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kroell, ThUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ley, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mashtakov, K. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mueller-Gatermann, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Regis, J. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Scheck, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schomacker, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sinclair, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Spagnoletti, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Suerder, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Warr, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Werner, VUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wiederhold, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-124686
DOI: 10.1103/PhysRevC.100.064304
Journal or Publication Title: Phys. Rev. C
Volume: 100
Number: 6
Date: 2019
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9993
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
NUCLEAR-DATA SHEETS; SHELLMultiple languages
Physics, NuclearMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/12468

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