High-resolution study of 0+ and 2+ excitations in 168Er with the (p,t) reaction

Bucurescu, D.; Graw, G.; Hertenberger, R.; Wirth, H. F.; LO IUDICE, Nicola; Sushkov, A. V.; Shirikova, N. Y. U.; Sun, Y.; Faestermann, T.; Krucken, R.; Mahgoub, M.; Jolie, J.; VON BRENTANO, P.; Braun, N.; Heinze, S.; Moller, O.; Mucher, D.; Scholl, C.; Casten, R. F.; Meyer, AND D. A.

doi:10.1103/PhysRevC.73.064309

Excited states in the deformed nucleus 168Er have been studied with high-energy resolution, in the (p, t ) reaction, with the Munich Q3D spectrograph. A number of 25 excited 0+ states (four tentative) and 63 2+ states have been assigned up to 4.0 MeV excitation energy. This unusually rich characterization of the 0+ and 2+ states in a deformed nucleus, close to a complete level scheme, offers a unique opportunity to check, in detail, models of nuclear structure that incorporate many excitation modes. A comparison of the experimental data is made with two such models: the quasiparticle-phonon model (QPM), and the projected shell model (PSM). The PSM wave functions appear to contain fewer correlations than those of the QPM and than required by the data.

High-resolution study of 0+ and 2+ excitations in 168Er with the (p,t) reaction / D., Bucurescu; G., Graw; R., Hertenberger; H. F., Wirth; LO IUDICE, Nicola; A. V., Sushkov; Shirikova, N. Y. U.; Y., Sun; T., Faestermann; R., Krucken; M., Mahgoub; J., Jolie; P., VON BRENTANO; N., Braun; S., Heinze; O., Moller; D., Mucher; C., Scholl; R. F., Casten; AND D. A., Meyer. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - STAMPA. - 73:(2006), pp. 064309-1-064309-4. [10.1103/PhysRevC.73.064309]