17 Rudigier, M. Walker, P. M. Canavan, R. L. Podolyák, Zs. Regan, P. H. Söderström, 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, Ł. W. Jolie, J. Karayonchev, V. Kennington, A. Koseoglou, Pavlos Lotay, G. Lorusso, G. Nakhostin, M. Nita, C. R. Oberstedt, S. Qi, L. Régis, J.-M. Sánchez-Tembleque, V. Shearman, R. Witt, Waldemar Vedia, V. Zell, K. O. KSP Physics letters / B Physics letters / B North-Holland Publ. Amsterdam 0370-2693 10.1016/j.physletb.2019.135140 English 135140 801 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. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. ; PUB:(DE-HGF)16, ; 0, ; WOS:000508018500026 Journal Article 2020 GSI-2021-00590 2020 https://repository.gsi.de/record/238011 https://doi.org/10.1016/j.physletb.2019.135140 <Go to ISI>://WOS:000508018500026