Electric quadrupole giant resonance in the photofission of 238U
- 1. Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, Brazil
Description
The 238U nucleus was studied measuring the electrofission yield and angular distributions of fission fragments, in the energy range of 5.5 to 28.3 MeV, using a new method of analysis. An E2 isoscalar giant resonance was found in the photofission cross section of 238U. This resonance exhausts (71 +- 7) % of the energy-weighted sum rule and is located at 9.9 +- 0.2 MeV with a width of 6.8 +- 0.4 MeV. The position of this resonance is in reasonable agreement with the Bohr and Mottelson prediction (58A/sup -1/3/ MeV). The width of 6.8 +- 0.4 MeV is compatible with a possible triple splitting of the resonance. From the angular distributions of photofission fragments and yield measurements of multipoles other than E1, evidence of an M1 mixture in the energy region 6--7 MeV was found
Additional details
Publishing Information
- Journal Title
- Phys. Rev., C
- Journal Volume
- 18
- Journal Issue
- 2
- Series
- Phys. Rev., C.
- Journal Page Range
- 863-869
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 10422832
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- ANGULAR DISTRIBUTION; ELECTRIC RESONANCE; ELECTROFISSION; FISSION FRAGMENTS; FISSION YIELD; GIANT RESONANCE; MEV RANGE 01-10; MEV RANGE 10-100; NILSSON-MOTTELSON MODEL; PHOTOFISSION; QUADRUPOLE MOMENTS; SUM RULES; URANIUM 238 TARGET
- Descriptors DEC
- DISTRIBUTION; ELECTRON REACTIONS; ENERGY RANGE; EQUATIONS; FISSION; LEPTON REACTIONS; MATHEMATICAL MODELS; MEV RANGE; NUCLEAR FRAGMENTS; NUCLEAR MODELS; NUCLEAR REACTION YIELD; NUCLEAR REACTIONS; PHOTONUCLEAR REACTIONS; RESONANCE; TARGETS