High-K band structures in 164 Er
- P., Bosetti
- G. B., Hagemann
- H., Ryde
- A., Brockstedt
- H., Carlsson
- L. P., Ekstrom
- A., Nordlund
- B., Herskind
- S., Leoni
- A., Bracco
- S., Frattini
- M., Mattiuzzi
- B., Million
- C., Rossi Alvarez
- G., de Angelis
- D., Bazzacco
- Lunardi, Santo
- R. A., Bark
- M., De Poli
- F., Camera
DOIAbstract
Several of the known rotational bands in 164Er are extended considerably (to around 35E). In addition, a new coupled band is established and found to decay by an isomeric transition with t1/2 S 170 nsec, to the 11m state of the known K?=7m two-quasi-proton band. The new band is interpreted as a four-quasi-particle structure, with measured values of B(M1)/B(E2) consistent with the configuration [7m] _ 9i13/2[642 5/2+] _ 9h9/2[523 5/2m], i.e. [7m] _ [AE,AF]. This is supported by the observation of a crossing which resembles the second i13/2 neutron crossing, BC, associated with the two-quasi-neutron band built on the configuration, [AE,AF]. The routhian of the new band is close to the sum of the individual routhians of [AE,AF] and [7m]. The c...
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