Investigation of the suitability of the (/sup 3/He,2n. gamma. ) reaction for the study of non-yrast states in /sup 99/Ru

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1982

OSTI ID:5000717

Whisnant, C S

Excited states of /sup 99/Ru have been studied using the /sup 98/Mo(/sup 3/He,2n..gamma..)/sup 99/Ru reaction at 13 MeV. Gamma ray angular distributions, gamma-gamma coincidence, and gamma-gamma directional correlation measurements are used to construct the level scheme and make spin and parity assignments. Gamma ray excitation functions are used to investigate the characteristics of the /sup 3/He reaction. A rotational model is used to interpret the data and identify the angular momentum multiplets which result from the coupling of the core and odd neutron angular momenta. Four such multiplets are identified by a comparison of predicted and observed branching ratios. A significant success of the model is the predicted decay of the 11/2/sup -/ state at 1070 keV, through competing E1 and M2 transitions, which is confirmed by the data. The characteristics of all four multiplets are accounted for by the Coriolis interaction and the variable momenta of inertia. The excitation function data indicate that the yields of all non-yrast transitions have similar energy dependences. Thus, yields for a few known transitions may be used to predict more appropriate bombarding energies in future experiments. The principles of operating the lithium vapor charge exchange ion source, used for the production of the /sup 3/He-beam, are discussed. Some of the unique complications arising from the /sup 3/He reaction are also discussed.

• Research Organization: Purdue Univ., Lafayette, IN (USA)
• OSTI ID: 5000717
• Country of Publication: United States
• Language: English

Related Subjects

651723* -- Nuclear Properties & Reactions
A=90-149
Experimental-- Energy Levels & Transitions-- (-1987)
651725 -- Nuclear Properties & Reactions
A=90-149
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIRECT REACTIONS
E1-TRANSITIONS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FUNCTIONS
HELIUM 3 REACTIONS
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
KNOCK-OUT REACTIONS
M1-TRANSITIONS
MOLYBDENUM 98 TARGET
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
RUTHENIUM 99
RUTHENIUM ISOTOPES
STABLE ISOTOPES
TARGETS