Alignment processes and shape variations in sup 184 Pt and sup 183 Au

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:5467164

Carpenter, M P

High-spin states in the transitional nuclei {sup 184}Pt and {sup 183}Au were measured via heavy-ion induced reactions. The three reactions used to study {sup 184}Pt, {sup 172}Yb({sup 16}4n){sup 184}Pt,{sup 154}Sm({sup 34}S,4n){sup 184}Pt and {sup 160}Yb({sup 29}Si,4n){sup 184}Pt, were run at beam energies ranging from 91 to 163 MeV. High-spin states in {sup 183}Au were populated using the {sup 152}Sm({sup 35}Cl,4n){sup 184}Pt reaction at 170 MeV. These measurements were performed at three separate facilities, the Holifield Institute for Heavy-Ion Research, McMaster University Tandem Laboratory, and Chalk River Laboratory, using multi-detector {gamma}-ray spectrometers of varied sophistication. Nuclear levels up to 37 h have been measured in {sup 184}Pt. Six new side bands have been identified, and the spins and parties in five of these bands have been firmly established. Four of these sides are associated with two-quasineutron configurations, while another side band has been assigned a two-quasiproton configuration. Levels in {sup 183}Au have been observed up to 61/2 h. This work represents the first in-beam measurement performed on this nucleus. Four rotational bands have been identified. Two of these structures have been associated with the 1/2 (541) Nilsson configuration, and the other two bands have been assigned the 1/2(530) and 1/2(660) configurations. While heavier Au isotopes have identified rotational bands built on the 11/2(505) Nilsson configuration, such a band has not been observed in the present data on {sup 183}Au. From the present work, strong evidence has been found which indicates that both {pi}h{sub 9/2}(1/2(541)) and {nu}i{sub 3/2}(9/2(624)) quasiparticle alignments are occurring at low rotational frequencies in Pt and Au nuclei at N = 104 to 108.

• Research Organization: Tennessee Univ., Knoxville, TN (USA)
• OSTI ID: 5467164
• Country of Publication: United States
• Language: English

Related Subjects

651820* -- Nuclear Properties & Reactions
A=150-189
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALIGNMENT
ALPHA DECAY RADIOISOTOPES
ANGULAR MOMENTUM
CHARGED-PARTICLE REACTIONS
CHLORINE 35 REACTIONS
COMPARATIVE EVALUATIONS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
EVEN-EVEN NUCLEI
GAMMA RADIATION
GOLD 183
GOLD ISOTOPES
HEAVY ION REACTIONS
HEAVY NUCLEI
HIGH SPIN STATES
HOURS LIVING RADIOISOTOPES
IN-BEAM SPECTROSCOPY
IONIZING RADIATIONS
ISOTOPES
MEASURING INSTRUMENTS
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
OXYGEN 16 REACTIONS
PARITY
PARTICLE PROPERTIES
PLATINUM 184
PLATINUM ISOTOPES
RADIATIONS
RADIOISOTOPES
SILICON 29 REACTIONS
SPECTROMETERS
SPECTROSCOPY
SPIN
SULFUR 34 REACTIONS