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E2 giant resonances and an M1 component in the photofission of /sup 236/U

Journal Article · · Phys. Rev., C; (United States)
Electrofission and photofission yields and electrofission-fragment angular distributions for /sup 236/U have been measured with fission-track detectors for incident electron energies from 5.5 to 33.0 MeV. Analysis of these data with the use of virtual-photon spectra calculated in distorted-wave Born approximation, combined with the known photofission cross section, results in the simultaneous determination for this nucleus of (a) a giant isoscalar E2 resonance located at 10.8 +- 0.4 MeV, having a width of 6 +- 1 MeV, and exhausting approx.70% of the isoscalar energy-weighted sum rule, and (b) a small M1 component located at 5.8 +- 0.2 MeV whose strength is <2% of that of the giant isoscalar E2 resonance. No evidence is seen for a giant isovector E2 resonance between 22 and 30 MeV.
Research Organization:
Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, Brazil
OSTI ID:
7184493
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 22:5; ISSN PRVCA
Country of Publication:
United States
Language:
English