Triaxiality near the $^{110}$Ru ground state from Coulomb excitation

• Published in: Physics letters. B Vol. 766; pp. 334 - 338
• Main Authors: Doherty, D., Allmond, J., Janssens, R., Korten, W., Zhu, S., Zielinska, M., Radford, D., Ayangeakaa, A., Bucher, B., Batchelder, J., Beausang, W., Campbell, C., Carpenter, M., Cline, D., Crawford, H.L., David, M., Delaroche, J., Dickerson, C., Fallon, P., Galindo-Uribarri, A., Kondev, G., Harker, J.L., Hayes, A., Hendricks, M., Humby, P., Girod, M., Gross, J., Klintefjord, M., Kolos, K., Lane, J., Lauritsen, T., Libert, J., Macchiavelli, A., Napiorkowski, J., Padilla-Rodal, E., Pardo, R., Reviol, W., Sarantites, D., Savard, G., Seweryniak, D., Srebrny, J., Varner, R., Vondrasek, R., Wiens, A., Wilson, E., Wood, J.L., Wu, C.Y.
• Format: Journal Article
• Language: English
• Published: Elsevier 10.03.2017
• Subjects: Nuclear Experiment; Physics; TRANSITION; ROTATION; DEFORMED-NUCLEI; SHAPES; NEUTRON-RICH NUCLEI; RU ISOTOPES; FISSION; QUADRUPOLE-MOMENTS; CHIRALITY; DEFORMATION
• ISSN: 0370-2693
• DOI: 10.1016/j.physletb.2017.01.031

A multi-step Coulomb excitation measurement with the GRETINA and CHICO2 detector arrays was carried out with a 430-MeV beam of the neutron-rich $^{110}$Ru (t$_{1/2}$= 12 s) isotope produced at the CARIBU facility. This represents the first successful measurement following the post-acceleration of an unstable isotope of a refractory element. The reduced transition probabilities obtained for levels near the ground state provide strong evidence for a triaxial shape; a conclusion confirmed by comparisons with the results of beyond-mean-field and triaxial rotor model calculations.