Triaxiality of neutron-rich $^{84,86,88}$Ge from low-energy nuclear spectra
- Lettmann, M.
- Werner, V.
- Pietralla, N.
- Doornenbal, P.
- Obertelli, A.
- Rodríguez, T.R.
- Sieja, K.
- Authelet, G.
- Baba, H.
- Calvet, D.
- Château, F.
- Chen, S.
- Corsi, A.
- Delbart, A.
- Gheller, J.M.
- Giganon, A.
- Gillibert, A.
- Lapoux, V.
- Motobayashi, T.
- Niikura, M.
- Paul, N.
- Roussé, J.Y.
- Sakurai, H.
- Santamaria, C.
- Steppenbeck, D.
- Taniuchi, R.
- Uesaka, T.
- Ando, T.
- Arici, T.
- Blazhev, A.
- Browne, F.
- Bruce, A.
- Caroll, R.J.
- Chung, L.X.
- Cortés, M.L.
- Dewald, M.
- Ding, B.
- Flavigny, F.
- Franchoo, S.
- Górska, M.
- Gottardo, A.
- Jungclaus, A.
- Lee, J.
- Linh, B.D.
- Liu, J.
- Liu, Z.
- Lizarazo, C.
- Momiyama, S.
- Moschner, K.
- Nagamine, S.
- Nakatsuka, N.
- Nita, C.
- Nobs, C.R.
- Olivier, L.
- Patel, Z.
- Podolyák, Zs.
- Rudigier, M.
- Saito, T.
- Shand, C.
- Söderström, P.A.
- Stefan, I.
- Vaquero, V.
- Wimmer, K.
- Xu, Z.
DOIAbstract
International audienceγ-ray transitions between low-spin states of the neutron-rich $^{84,86,88}$Ge were measured by means of in-flight γ-ray spectroscopy at 270 MeV/u. Excited 61+,41,2+, and 21,2+ states of $^{84,86}$Ge and 41+ and 21,2+ states of $^{88}$Ge were observed. Furthermore, a candidate for a 31+ state of $^{86}$Ge was identified. This state plays a key role in the discussion of ground-state triaxiality of $^{Ge}$86, along with other features of its low-energy level scheme. A new region of triaxially deformed nuclei is proposed in the Ge isotopic chain
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