The level structure of $\sp{83}$Zr was investigated via the fusion-evaporation reaction $\sp{54}$Fe($\sp{32}$S,2pn)$\sp{83}$Zr at beam energies between 105 and 120 MeV using in-beam $\gamma$-ray spectroscopy techniques. $\gamma$ transitions from the decay of $\sp{83}$Zr were unambiguously identified by means of recoil-$\gamma$ and neutron-$\gamma$ coincidence experiments. The decay scheme was constructed on the basis of Compton suppressed $\gamma$-$\gamma$ coincidences, delayed $\gamma$-$\gamma$ coincidences and angular distribution measurements. A total of 34 transitions were identified connecting 26 new energy levels and the previously known ground state. The lifetimes of two low-lying isomeric states were determined. / A decoupled positive parity band built on the odd $g\sb{9/2}$ neutron configuration was observed up to spin 37/2 $\hbar$ with the first band crossing due to proton alignment showing a sharp backbend at $\hbar\omega$ $\approx$ 0.5 MeV. A strongly coupled negative parity band based on a 5/2$\sp-$ bandhead was observed up to spin 35/2 $\hbar$. The angular momentum alignment is discussed and compared to neighboring nuclei. A theoretical analysis was performed using the Woods-Saxon cranking model. The results of the calculation are consistent with the experimental findings for $\sp{83}$Zr and its neighbors. Triaxial shapes are predicted for all observed bands in $\sp{83}$Zr. At higher angular momenta a transition to well deformed prolate bands including the $h\sb{11/2}$ intruder orbitals is expected. / Source: Dissertation Abstracts International, Volume: 49-03, Section: B, page: 0804. / Major Professor: Samuel L. Tabor. / Thesis (Ph.D.)--The Florida State University, 1987.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_76258 |
| Contributors | Huttmeier, Uwe J., Florida State University |
| Source Sets | Florida State University |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | 153 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
Page generated in 0.0016 seconds