Universität zu Köln

Karayonchev, V, Stoyanova, M., Rainovski, G., Jolie, J., Blazhev, A., Djongolov, M., Esmaylzadeh, A., Fransen, C., Gladnishki, K., Knafla, Lukas ORCID: 0000-0001-7926-4639, Kocheva, D., Kornwebel, L., Regis, J-M, De Gregorio, G. and Gargano, A. (2021). Lifetimes and structures of low-lying negative-parity states of Po-209. Phys. Rev. C, 103 (4). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9993

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Abstract

The 5/2(1)(-), 9/2(1)(-), and 11 /2(1)(-) states in Po-209 were populated in the beta decay of At-209 and their lifetimes measured using the electronic gamma-gamma fast timing technique. The lifetime of the 9/2(1)(-) state is measured for first time. The lifetime of the 5/2(1)(-) is measured to be shorter than the value adopted in the literature while the lifetime of the 11/2(1)(-) state agrees well with the previous measurement. In order to get deeper insight into the structure of the states, a shell-model calculation was carried out adopting a microscopic effective interaction derived from the realistic CD-Bonn potential. The comparison between theoretical and experimental data for the low-lying negative-parity states of Po-209 supports the reliability of the predicted wave functions, which are found to be dominated by the coupling of a neutron hole to the yrast states of Po-210. However, it also points to the important role played by minor wave-function components in describing the reduced electromagnetic strengths, suggesting the need of additional configuration mixing for achieving a better quantitative agreement.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Karayonchev, V UNSPECIFIED UNSPECIFIED UNSPECIFIED Stoyanova, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rainovski, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jolie, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Blazhev, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Djongolov, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Esmaylzadeh, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fransen, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gladnishki, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Knafla, Lukas lknafla@ikp.uni-koeln.de orcid.org/0000-0001-7926-4639 UNSPECIFIED Kocheva, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kornwebel, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Regis, J-M UNSPECIFIED UNSPECIFIED UNSPECIFIED De Gregorio, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gargano, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-586205
DOI:	10.1103/PhysRevC.103.044309
Journal or Publication Title:	Phys. Rev. C
Volume:	103
Number:	4
Date:	2021
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9993
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute for Nuclear Physics
Subjects:	Natural sciences and mathematics
Uncontrolled Keywords:	Keywords Language SHELL-MODEL CALCULATIONS; NUCLEON-NUCLEON POTENTIALS; LEAD REGION; DATA SHEETS; DECAY; AT-209 Multiple languages Physics, Nuclear Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/58620