Giant dipole resonance and the shape of the transition nuclei Ir and Pt
Photoneutron yield curves have been measured for the isotopes /sup 191,193/Ir and /sup 194,195,196,198/Pt in the bremsstrahlung beam of a betatron in the energy range 8--21 MeV with a 0.2-MeV step. For the isotopes /sup 194,196,198/Pt we have also measured the photoneutron multiplicity curves. The measurements were made on-line with a computer. The cross sections were calculated from the yield curves by the Penfold-Leiss method with a 1.0-MeV step. The multiplicty curves were used to separate the contributions of (..gamma..,n) and (..gamma..,2n) reactions. On the basis of the photoabsorption cross sections we have calculated the integrated cross sections, deformation parameters, and average energies. The existence of oblate deformation in these nuclei is not confirmed by the analysis of the measured cross sections.
- Research Organization:
- Saratov State University
- OSTI ID:
- 6320668
- Journal Information:
- Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Vol. 27:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
IRIDIUM 191 TARGET
PHOTONUCLEAR REACTIONS
IRIDIUM 193 TARGET
PHOTONEUTRONS
NUCLEAR REACTION YIELD
PLATINUM ISOTOPES
DEFORMED NUCLEI
GIANT RESONANCE
MEV RANGE 10-100
MULTIPLICITY
BARYONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRONS
MEV RANGE
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PHOTONUCLEONS
RESONANCE
TARGETS
YIELDS
651925* - Nuclear Properties & Reactions
A=190-219
Experimental- Nuclear Reactions & Scattering- (-1987)