1. Evidence for Coexisting Shapes through Lifetime Measurements in Zr98
- Author
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Singh, Purnima, Korten, Wolfram, Hagen, T. W., Gorgen, Andreas, Grente, Lucie, Salsac, Marie Delphine, Farget, Fanny, Clement, Emmanuel, de France, Gilles, Braunroth, Thomas, Bruyneel, Bart, Čeliković, Igor T., Delaune, Olivier, Dewald, Alfred, Dijon, A., Delaroche, Jean Paul, Girod, Michel, Hackstein, Matthias, Jacquot, Bertrand, Libert, J., Litzinger, J., Ljungvall, Joa, Louchart, C., Gottardo, Andrea, Michelagnoli, Caterina, Muller-Gatermann, C, Napoli, Daniel R., Otsuka, Takaharu, Pillet, Nathalie, Recchia, Francesco, Rother, Wolfram, Sahin, E., Siem, Sunniva, Sulignano, Barbara, Togashi, Tomoaki, Tsunoda, Yuhsuke, Theisen, Christophe, Valiente-Dobon, Jose Javier, Singh, Purnima, Korten, Wolfram, Hagen, T. W., Gorgen, Andreas, Grente, Lucie, Salsac, Marie Delphine, Farget, Fanny, Clement, Emmanuel, de France, Gilles, Braunroth, Thomas, Bruyneel, Bart, Čeliković, Igor T., Delaune, Olivier, Dewald, Alfred, Dijon, A., Delaroche, Jean Paul, Girod, Michel, Hackstein, Matthias, Jacquot, Bertrand, Libert, J., Litzinger, J., Ljungvall, Joa, Louchart, C., Gottardo, Andrea, Michelagnoli, Caterina, Muller-Gatermann, C, Napoli, Daniel R., Otsuka, Takaharu, Pillet, Nathalie, Recchia, Francesco, Rother, Wolfram, Sahin, E., Siem, Sunniva, Sulignano, Barbara, Togashi, Tomoaki, Tsunoda, Yuhsuke, Theisen, Christophe, and Valiente-Dobon, Jose Javier
- Abstract
The lifetimes of the first excited 2+, 4+, and 6+ states in Zr98 were measured with the recoil-distance Doppler shift method in an experiment performed at GANIL. Excited states in Zr98 were populated using the fission reaction between a 6.2 MeV/u U238 beam and a Be9 target. The γ rays were detected with the EXOGAM array in correlation with the fission fragments identified by mass and atomic number in the VAMOS++ spectrometer. Our result shows a very small B(E2;21+→01+) value in Zr98, thereby confirming the very sudden onset of collectivity at N=60. The experimental results are compared to large-scale Monte Carlo shell model and beyond-mean-field calculations. The present results indicate the coexistence of two additional deformed shapes in this nucleus along with the spherical ground state. © 2018 American Physical Society.
- Published
- 2018