Isomeric ratios in photonuclear reactions of molybdenum isotopes induced by bremsstrahlung in the giant dipole resonance region

• Published in: Physics of particles and nuclei letters 2017, Vol.14 (1), p.102-111
• Main Authors: Thiep, Tran Duc, An, Truong Thi, Cuong, Phan Viet, Vinh, Nguyen The, Hue, Bui Minh, Belov, A. G., Maslov, O. D., Mishinsky, G. V., Zhemenik, V. I.
• Format: Article
• Language: English
• Subjects: Bremsstrahlung; Dipoles; Isotopes; Molybdenum isotopes; Particle and Nuclear Physics; Photonuclear reactions; Physics; Physics and Astronomy; Physics of Elementary Particles and Atomic Nuclei. Experiment; Time measurement
• ISSN: 1547-4771; 1531-8567
• DOI: 10.1134/S1547477117010241

We have determined the isomeric ratios of isomeric pairs 97m,g Nb, 95m,g Nb and 91m,g Mo produced in 98 Mo(γ, p) 97m,g Nb, 96 Mo(γ, p) 95m,g Nb and 92 Mo(γ, n) 91m,g Mo photonuclear reactions in the giant dipole resonance (GDR) region by the activation method. The results were analyzed, discussed and compared with the similar data from literature to examine the role of excitation energy, neutron configuration, channel effect and direct and pre-equilibrium processes in (γ, p) photonuclear reactions. In this work the isomeric ratios for 97m,g Nb from 14 to 19 MeV, for 195m,g Nb from14 to 24 MeV except 20 and 23.5 MeV and for 91m,g Mo at 14 and 15 MeV are the first time measurements.