Universität zu Köln

Wiederhold, J., Werner, V., Kern, R., Pietralla, N., Bucurescu, D., Carroll, R., Cooper, N., Daniel, T., Filipescu, D., Florea, N., Gerst, R-B., Ghita, D., Gurgi, L., Jolie, J., Ilieva, R. S., Lica, R., Marginean, N., Marginean, R., Mihai, C., Mitu, I. O., Naqvi, F., Nita, C., Rudigier, M., Stegemann, S., Pascu, S. and Regan, P. H. (2019). Evolution of E2 strength in the rare-earth isotopes Hf-174,Hf-176,Hf-178,Hf-180. Phys. Rev. C, 99 (2). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9993

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Abstract

Mean lifetimes of yrast states of the isotopes Hf-174,Hf-176,Hf-178,Hf-180 have been measured using fast-electronic scintillation timing. Excited states of Hf-174,Hf-176,Hf-178 were populated via beta decay, while 180 Hf was populated via Coulomb excitation. The lifetimes of the 2(1)(+) and 4(1)(+) states of all isotopes and the lifetimes of the 6(1)(+) states of Hf-174,Hf-178 were measured, using the slope and the centroid shift methods. The mean lifetime, tau(4(1)(+)) = 85(13) ps, of Hf-178 has been determined for the first time. In addition, the mean lifetimes of the 2(1)(-) and the 3(1)(-) states of Hf-176 have been determined. Systematic uncertainties on the evolution of data as a function of neutron number were reduced by using the same setup for all the isotopes of interest. The data are in agreement with other recent lifetime measurements where available and shows a shift of the maximum of collectivity for the Hf isotopic chain from neutron midshell at N = 104 to N = 100.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wiederhold, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Werner, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kern, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pietralla, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bucurescu, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Carroll, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cooper, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Daniel, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Filipescu, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Florea, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gerst, R-B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ghita, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gurgi, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jolie, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ilieva, R. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lica, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Marginean, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Marginean, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mihai, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mitu, I. O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Naqvi, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nita, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rudigier, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stegemann, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pascu, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Regan, P. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-156403
DOI:	10.1103/PhysRevC.99.024316
Journal or Publication Title:	Phys. Rev. C
Volume:	99
Number:	2
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:	Keywords Language NUCLEAR-DATA SHEETS; PICOSECOND LIFETIME MEASUREMENTS; NEUTRON-RICH NUCLEI; EXCITED-STATES; DEFORMATIONS; SHAPES; DECAY Multiple languages Physics, Nuclear Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15640