Journal Article

GSI-2021-00590

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Multi-quasiparticle sub-nanosecond isomers in $^{178}W$

Rudigier, M. (Corresponding author) ; Walker, P. M. (Corresponding author) ; Canavan, R. L. ; Podolyák, Z. ; Regan, P. H. ; Söderström, P.-A.GSI* ; 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, Ł. W. ; Jolie, J. ; Karayonchev, V. ; Kennington, A. ; Koseoglou, P.GSI* ; Lotay, G. ; Lorusso, G. ; Nakhostin, M. ; Nita, C. R. ; Oberstedt, S. ; Qi, L. ; Régis, J.-M. ; Sánchez-Tembleque, V. ; Shearman, R. ; Witt, W.GSI* ; Vedia, V. ; Zell, K. O.

2020
North-Holland Publ. Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.physletb.2019.135140  doi:10.15120/GSI-2021-00590

Abstract: We report on the first measurement of the half-lives of Kπ=11− and 12+ four-quasiparticle states in the even-even nucleus 178 W. The sub-nanosecond half-lives were measured by applying the centroid shift method to data taken with LaBr 3 (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 Iπ=11− and 12+ states, respectively. The decay transitions include weakly hindered E 1 and E 2 branches directly to the ground-state band, bypassing the two-quasiparticle states. This is the first such observation for an E 1 transition. The interpretation of the small hindrance hinges on mixing between the ground-state band and the t-band.

Note: This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.

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Contributing Institute(s):

1. Kernspektroskopie (KSP)

Research Program(s):

1. 899 - ohne Topic (POF4-899) (POF4-899)
2. SUC-GSI-Darmstadt - Strategic university cooperation GSI-TU Darmstadt (SUC-GSI-DA) (SUC-GSI-DA)

Experiment(s):

1. (Facility Altdaten therefore no facility)

Appears in the scientific report 2021

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Database coverage:
; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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