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Nuclear spectroscopy of /sup 189/Os. [J,. pi. , Nilsson systematics]

Journal Article · · Phys. Rev., C; (United States)
; ; ;

Forty-three states have been observed up to an energy of 1474 keV in /sup 189/Os using reactions /sup 188/Os(d,p)/sup 189/Os and /sup 190/Os(d,t)/sup 189/Os, produced with 12 MeV deuterons, and the /sup 188/Os(n,..gamma..)/sup 189/Os reaction using thermal neutrons and observing ..gamma.. rays from 36 to 5933 keV. The neutron separation energy of /sup 189/Os was determined to be 5920.8 +- 2.0 keV in agreement with the value of the (d,p) reaction. The Q value for the/sup 190/Os(d,t)/sup 180/Os reaction was measured to be -1530 +- 4 keV. Using l-transfer results, spin-parities were assigned to 14 states. A number of states up to 818 keV were qualitatively interpreted in terms of the Nilsson model. Anomalous Nilsson systematics particularly of the 1/2-(510) and 3/2-(512) bands involving anomalously large (d,p) and (d,t) cross sections populating the 5/2- and 3/2- states at 69.6 and 95.3 keV, respectively, are interpreted in terms of decreasing deformation and the consequent increase in Coriolis coupling. The low lying 5/2- state at 276 keV is interpreted as the lowest rotational state built on the 9/2-(505) level at 30.8 keV. This implies triaxiality for this configuration. (AIP)

Research Organization:
Florida State University, Tallahassee, Florida 32306
OSTI ID:
7342117
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 14:6; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651823* -- Nuclear Properties & Reactions
A=150-189
Experimental-- Energy Levels & Transitions-- (-1987)
651825 -- Nuclear Properties & Reactions
A=150-189
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BARYON REACTIONS
BARYONS
CAPTURE
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DEUTERON REACTIONS
DIRECT REACTIONS
ELEMENTARY PARTICLES
ENERGY
ENERGY RANGE
EVEN-ODD NUCLEI
FERMIONS
GAMMA SPECTRA
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NEUTRON REACTIONS
NEUTRONS
NILSSON-MOTTELSON MODEL
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEAR STRUCTURE
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ONE-NUCLEON TRANSFER REACTIONS
OSMIUM 188 TARGET
OSMIUM 189
OSMIUM 190 TARGET
OSMIUM ISOTOPES
PARITY
PARTICLE PROPERTIES
PROTONS
Q-VALUE
RADIOISOTOPES
SPECTRA
SPIN
STABLE ISOTOPES
STRIPPING
TARGETS
THERMAL NEUTRONS
TRANSFER REACTIONS
TRITONS