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Triaxiality near the 110Ru ground state from Coulomb excitation

  • Author(s): Doherty, DT;
  • Allmond, JM;
  • Janssens, RVF;
  • Korten, W;
  • Zhu, S;
  • Zielińska, M;
  • Radford, DC;
  • Ayangeakaa, AD;
  • Bucher, B;
  • Batchelder, JC;
  • Beausang, CW;
  • Campbell, C;
  • Carpenter, MP;
  • Cline, D;
  • Crawford, HL;
  • David, HM;
  • Delaroche, JP;
  • Dickerson, C;
  • Fallon, P;
  • Galindo-Uribarri, A;
  • Kondev, FG;
  • Harker, JL;
  • Hayes, AB;
  • Hendricks, M;
  • Humby, P;
  • Girod, M;
  • Gross, CJ;
  • Klintefjord, M;
  • Kolos, K;
  • Lane, GJ;
  • Lauritsen, T;
  • Libert, J;
  • Macchiavelli, AO;
  • Napiorkowski, PJ;
  • Padilla-Rodal, E;
  • Pardo, RC;
  • Reviol, W;
  • Sarantites, DG;
  • Savard, G;
  • Seweryniak, D;
  • Srebrny, J;
  • Varner, R;
  • Vondrasek, R;
  • Wiens, A;
  • Wilson, E;
  • Wood, JL;
  • Wu, CY
  • et al.
Abstract

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 110Ru (t1/2=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.

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