Investigation of Excitation of Isomers Hf and Hf in () Reactions

The weighted-average cross sections for Hf and Hf population in ( ) reactions induced by gamma rays of bremsstrahlung spectrum with endpoint energies of 17.5, 37, and 55 MeV were measured for the first time. A second maximum in the excitation function for the forbidden isomers of Hf and Hf was found...

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Bibliographic Details
Published in:Physics of atomic nuclei 2020-07, Vol.83 (4), p.539-544
Main Authors: Zheltonozhsky, V. A., Zheltonozhskaya, M. V., Savrasov, A. N., Chernyaev, A. P., Yatsenko, V. N.
Format: Article
Language:English
Subjects:
Analysis
Bremsstrahlung
Computer simulation
Excitation
Gamma rays
Investigations
Isomers
Nuclear cross sections
NUCLEI/Experiment
Particle and Nuclear Physics
Physics
Physics and Astronomy
Statistical models
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Summary:The weighted-average cross sections for Hf and Hf population in ( ) reactions induced by gamma rays of bremsstrahlung spectrum with endpoint energies of 17.5, 37, and 55 MeV were measured for the first time. A second maximum in the excitation function for the forbidden isomers of Hf and Hf was found in the energy range between 20 and 35 MeV. A respective simulation was performed within the model of pre-equilibrium processes and within the statistical model by employing the TALYS-1.9 and EMPIRE-3.2 codes. It is shown that the integrated cross sections for ( ) reactions in the energy range between 20 and 55 MeV are described in the statistical limit of the compound-nucleus volume (TALYS-1.9 code).
ISSN:1063-7788
1562-692X
DOI:10.1134/S1063778820040201