UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2024-11-23 17:40
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Conference: Bucharest University Faculty of Physics 2014 Meeting


Section: Nuclear and Elementary Particles Physics


Title:
The isomeric ratios of primary photofission products of 238U - (2)


Authors:
Cristina OPREA(1), Ioan Alexandru OPREA(1), Ion GRUIA(2), Marian PETRE(3)


Affiliation:
1) Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics,

141980 Dubna, Moscow Region, RF

2) Faculty of Physics, Department of Optics, Spectroscopy and Lasers, University of Bucharest, RO-077125 Magurele, Romania

3) “Horia Hulubei” National Institute of Physics and Nuclear Engineering, Department of Theoretical Physics, RO-76900 Magurele, Romania



E-mail
coprea2005@yahoo.co.uk


Keywords:
Nuclear reactions, 238U, photofission


Abstract:
The photofission fragments of 238U by the process of nuclear fission induced by gamma quanta are obtained. Cross section of photofission process of 238U is evaluated for gamma energy up to some MeV-s, including the giant-resonance region. The theoretical evaluated cross section is compared with experimental data. In this contribution we present a study of isomeric yield ratios of the primary photofission products of 238U. The standard codes and programs realized by the authors for calculation of isomer ratios were used. Using the Hauser-Feshbach model of nuclear reactions, effects of gamma quanta on the nuclear structure parameters of the compound nucleus by use of isomer ratio method are discussed.