Study of the radiative strength functions of the nuclei /sup 174/Yb and/sup 176,177/ Lu by means of the (n,. gamma. ) reaction in isolated resonances

Journal Article · Sat Aug 01 04:00:00 EDT 1987 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:5226598

Bec-brevevar, F; Honzatko, J; Montero-Kabrera, M E; Telezhnikov, S A; Hiep, H T

The IBR-30 reactor and the time-of-flight method have been used to measure the ..gamma..-ray spectra accompanying capture of neutrons by the nuclei /sup 173/Yb and /sup 175//sup ,//sup 176/Lu in isolated resonances. Absolute intensities of several transitions have been obtained. From a combination of the results of the present work and published data we have determined the radiative strength functions of the nuclei /sup 174/Yb and /sup 176//sup ,//sup 177/Lu for E1 transitions with energies in the vicinity of the neutron binding energy. The radiative-strength-function values obtained are compared with the values expected on the basis of a Lorentz extrapolation of the giant electric dipole resonance. The strength-function values averaged over various sets of resonances and over sets of correlated and uncorrelated transitions in the reaction /sup 173/Yb(n,..gamma..) indicate violation of strictly random fragmentation of the giant electric dipole resonance. In the reaction /sup 176/Lu(n,..gamma..) the radiative strength function is enhanced in the case of transitions whose partial radiative widths are correlated with the reduced neutron widths. The question of the sensitivity of the partial radiative widths to the quantum number K of the final levels is analyzed. The spin dependence of the radiative strength function for /sup 174/Yb and /sup 176/Lu is confirmed

• Research Organization: Joint Institute for Nuclear Research
• OSTI ID: 5226598
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 46:2; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

651820* -- Nuclear Properties & Reactions
A=150-189
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CAPTURE
DAYS LIVING RADIOISOTOPES
E1-TRANSITIONS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
FUNCTIONS
GAMMA RADIATION
GAMMA SPECTRA
HADRON REACTIONS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
ISOTOPES
LUTETIUM 175 TARGET
LUTETIUM 176
LUTETIUM 176 TARGET
LUTETIUM 177
LUTETIUM ISOTOPES
MULTIPOLE TRANSITIONS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
RADIATIONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SPECTRA
STABLE ISOTOPES
STRENGTH FUNCTIONS
TARGETS
YEARS LIVING RADIOISOTOPES
YTTERBIUM 173 TARGET
YTTERBIUM 174
YTTERBIUM ISOTOPES