Resolution-enhanced spectroscopy of {sup 81}Y
- Institut fuer Kern- und Hadronenphysik, Forschungszentrum Rossendorf, D-01314 Dresden (Germany)
- Physics Department, Florida State University, Tallahassee, Florida 32306 (United States)
- Oak Ridge Institute of Science and Education, Oak Ridge, Tennessee 37831 (United States)
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Department of Physics, Tulane University, New Orleans, Louisiana 70118 (United States)
- Chemistry Department, Washington University, St. Louis, Missouri 63130 (United States)
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
The fusion-evaporation reaction {sup 58}Ni({sup 32}S,2{alpha}p) has been used to study the neutron-deficient isotope {sup 81}Y. Multiple particle {gamma}-ray coincidences have been detected by the GAMMASPHERE array combined with the MICROBALL charged-particle detector system. Gamma-ray spectra with an improved resolution have been achieved from an event-by-event determination of the nucleus recoil momentum, thus allowing a precise Doppler-shift correction. In this way a resolution enhancement by a factor 2 was obtained for a 1 MeV {gamma} line. During the analysis an E{sub {gamma}}-E{sub {gamma}} matrix as well as an E{sub {gamma}}-E{sub {gamma}}-E{sub {gamma}} cube have been used to extend the previously known level scheme to higher spin (I{approx}(57)/(2)) and excitation energy (E{sub x}{approx}17MeV). More than 100 new {gamma} rays and 80 new levels have been added to the level scheme and six new bands have been established. The interpretation of these bands in terms of the cranking model and their comparison with similar bands in neighboring nuclei is discussed. {copyright} {ital 1997} {ital The American Physical Society}
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098; AC05-76OR00033; AC05-96OR22464; FG02-88ER40406
- OSTI ID:
- 656138
- Journal Information:
- Physical Review, C, Vol. 56, Issue 2; Other Information: PBD: Aug 1997
- Country of Publication:
- United States
- Language:
- English
Similar Records
{gamma}-ray spectroscopy of neutron-deficient {sup 110}Te. II. High-spin smooth-terminating structures
Low-, medium-, and high-spin states in the nucleus