Description of nuclear photoexcitation by Lorentzian expressions for electric dipole photon strength function

. The description of photoabsorption cross-sections of cold nuclei by closed-form Lorentzian models of photon strength functions for photoexcitation by electric dipole gamma-rays is considered. Systematics of the GDR parameters are given and input parameters of different analytical models are discus...

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Bibliographic Details
Published in:The European physical journal. A, Hadrons and nuclei Hadrons and nuclei, 2019-11, Vol.55 (11), p.1-12, Article 210
Main Authors: Plujko, Vladimir, Gorbachenko, Oleksandr, Solodovnyk, Kateryna
Format: Article
Language:English
Subjects:
Electric dipoles
Even-even nuclei
Gamma rays
Hadrons
Heavy Ions
Mathematical models
Nuclear Fusion
Nuclear Physics
Parameters
Particle and Nuclear Physics
Photoabsorption
Photoexcitation
Photons
Physics
Physics and Astronomy
Regular Article - Theoretical Physics
Sum rules
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Summary:. The description of photoabsorption cross-sections of cold nuclei by closed-form Lorentzian models of photon strength functions for photoexcitation by electric dipole gamma-rays is considered. Systematics of the GDR parameters are given and input parameters of different analytical models are discussed The experimental data are compared with theoretical calculations for even-even nuclei using criteria of minimum of both least-square value and root-mean-square deviation factor. Simple extensions of the models with energy-dependent widths to high gamma-ray energies ≳ 30 MeV which hold the energy-weighted sum rule for E1 gamma-transitions in good approximation are proposed and tested.
ISSN:1434-6001
1434-601X
DOI:10.1140/epja/i2019-12899-6