Rudigier, M., Walker, P. M., Canavan, R. L., Podolyak, Zs., Regan, P. H., Soederstroem, P. -A., Lebois, M., Wilson, J. N., Jovancevic, N., Blazhev, A., Benito, J., Bottoni, S., Brunet, M., Cieplicka-Orynczak, N., Courtin, S., Doherty, D. T., Fraile, L. M., Hadynska-Klek, K., Heine, M., Iskra, L. W., Jolie, J., Karayonchev, V., Kennington, A., Koseoglou, P., Lotay, G., Lorusso, G., Nakhostin, M., Nita, C. R., Oberstedt, S., Qi, L., Regis, J. -M., Sanchez-Tembleque, V., Shearman, R., Witt, W., Vedia, V. and Zell, K. O. (2020). Multi-quasiparticle sub-nanosecond isomers in W-178. Phys. Lett. B, 801. AMSTERDAM: ELSEVIER. ISSN 1873-2445

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Abstract

We report on the first measurement of the half-lives of K-pi = 11(-) and 12(+) four-quasiparticle states in the even-even nucleus W-178. The sub-nanosecond half-lives were measured by applying the centroid shift method to data taken with LaBr3(Ce) scintillator detectors of the NuBall array at the ALTO facility in Orsay, France. The half-lives of these states only became experimentally accessible by the combination of several experimental techniques - scintillator fast timing, isomer spectroscopy with a pulsed beam, and the event-by-event calorimetry information provided by the NuBall array. The measured half-lives are 476(44)ps and 275(65)ps for the I-pi = 11(-) and 12(+) states, respectively. The decay transitions include weakly hindered E1 and E2 branches directly to the ground-state band, bypassing the two-quasiparticle states. This is the first such observation for an E1 transition. The interpretation of the small hindrance hinges on mixing between the ground-state band and the t-band. (C) 2019 The Author(s). Published by Elsevier B.V.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Rudigier, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Walker, P. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Canavan, R. L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Podolyak, Zs.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Regan, P. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Soederstroem, P. -A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lebois, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wilson, J. N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jovancevic, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blazhev, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Benito, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bottoni, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brunet, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cieplicka-Orynczak, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Courtin, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Doherty, D. T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fraile, L. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hadynska-Klek, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Heine, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Iskra, L. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jolie, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Karayonchev, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kennington, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Koseoglou, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lotay, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lorusso, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nakhostin, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nita, C. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Oberstedt, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Qi, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Regis, J. -M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sanchez-Tembleque, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shearman, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Witt, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vedia, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zell, K. O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-345193
DOI: 10.1016/j.physletb.2019.135140
Journal or Publication Title: Phys. Lett. B
Volume: 801
Date: 2020
Publisher: ELSEVIER
Place of Publication: AMSTERDAM
ISSN: 1873-2445
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
LIFETIME MEASUREMENTS; SPECTROSCOPY; NUCLEI; DECAYMultiple languages
Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & FieldsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/34519

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