Abstract
Two superdeformed (SD) bands extending over eight to eleven transitions have been identified in 83Zr. The quadrupole moment of the more intense band was determined by the Residual Doppler Shift Method and is consistent with a quadrupole deformation of β2 ≈ 0.5. The large quadrupole moment and population intensity of the yrast SD band (≈ 5%) in Zr isotopes relative to their isotones in Sr and Y nuclei suggest the presence of a large SD shell gap at proton number Z = 40. At the decay-out points, the Routhians of the SD bands reapproach that of the positive parity normally-deformed states which may be the reason why both of these bands feed mainly (≈ 85%) into the positive-parity yrast band.
| Original language | English |
|---|---|
| Pages (from-to) | 463-469 |
| Number of pages | 7 |
| Journal | Physics Letters B |
| Volume | 389 |
| Issue number | 3 |
| DOIs | |
| State | Published - Dec 19 1996 |
Funding
The authorsw ould like to thank R.M. Clark, P. Fal-lon, and R. MacLeod for support during the experiment. One of us (D.R.) acknowledges the use of the spectruma nalysis code vs developeda t the University of Cologne and the Radware analysis package. Oak Ridge National Laboratory is managed by Lockheed Martin ResearchC orp. for the U.S. Depart-mento f Energy underc ontractD E-AC05-960R22464. This researchw as supportedb y an appointmentt o the Oak RidgeNational LaboratoryP ostdoctoralR esearch Associates Program administeredj ointly by the Oak Ridge Institute for Science and Education and Oak Ridge National Laboratory. This work was also supported in part by the U.S. Departmento f Energy under grantN o. DE-FG05-88ER40406 ( WU) and by the National Science Foundation under grant No. PHY-9210082( FSU) and No. PHY-9319934 (Pittsburgh).