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:
CreatorsEmailORCIDORCID Put Code
Wiederhold, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Werner, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kern, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pietralla, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bucurescu, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Carroll, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cooper, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Daniel, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Filipescu, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Florea, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gerst, R-B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ghita, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gurgi, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jolie, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ilieva, R. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lica, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marginean, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marginean, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mihai, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mitu, I. O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Naqvi, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nita, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rudigier, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stegemann, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pascu, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Regan, P. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
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:
KeywordsLanguage
NUCLEAR-DATA SHEETS; PICOSECOND LIFETIME MEASUREMENTS; NEUTRON-RICH NUCLEI; EXCITED-STATES; DEFORMATIONS; SHAPES; DECAYMultiple languages
Physics, NuclearMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/15640

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