Signature splitting in /sup 135/Pr

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6729074

Semkow, T M; Sarantites, D G; Honkanen, K; Abenante, V; Baktash, C; Johnson, N R; Lee, I Y; Oshima, M; Schutz, Y; Chen, C Y

In-beam spectroscopic study of /sup 135/Pr was made using 91 MeV /sup 120/Sn(/sup 19/F,4n) reaction. A strong negative parity proton band based on the h/sub 11/2/sup -// 1/2(550) configuration with ..cap alpha.. = -1/2 was observed. Possibly ..cap alpha.. = +1/2 unfavored band is observed. Also two positive parity proton bands are observed most likely based on the g/sub 7/2/sup +// 5/2(413) configurations with ..cap alpha.. = +-1/2. In all cases (except for the (..pi..,..cap alpha..) = (-,+1/2) band) the backbending is caused by alignment of two h/sub 11/2/sup -// 9/2(514) quasi-neutrons. For the strongly decoupled ..pi..(-) bands the observed signature splitting decreases with increasing rotational frequency. The signature splitting of the positive parity bands increases with rotational frequency and then inverts above the backbending. This is interpreted to be caused by the quasi-neutrons, which drive the ..gamma..-deformation to the negative values. 18 refs., 6 figs.

• Research Organization: Washington Univ., St. Louis, MO (USA); Oak Ridge National Lab., TN (USA); Pittsburgh Univ., PA (USA); Tennessee Univ., Knoxville (USA); Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6729074
• Report Number(s): CONF-850942-59; ON: DE87005977
• Country of Publication: United States
• Language: English

Related Subjects

651920* -- Nuclear Properties & Reactions
A=190-219
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
DATA
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
EXPERIMENTAL DATA
FLUORINE 19 REACTIONS
FREQUENCY DEPENDENCE
GAMMA SPECTROSCOPY
HEAVY ION REACTIONS
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PRASEODYMIUM 135
PRASEODYMIUM ISOTOPES
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
ROTATIONAL STATES
SPECTROSCOPY
TARGETS
TIN 120 TARGET