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

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Abstract.

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 \( \gtrsim 30\) MeV which hold the energy-weighted sum rule for E1 gamma-transitions in good approximation are proposed and tested.

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Correspondence to Oleksandr Gorbachenko.

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Communicated by P. Capel

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This manuscript has no associated data or the data will not be deposited. [Authors’ comment: All data generated during this study are contained in this published article.]

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Plujko, V., Gorbachenko, O. & Solodovnyk, K. Description of nuclear photoexcitation by Lorentzian expressions for electric dipole photon strength function. Eur. Phys. J. A 55, 210 (2019). https://doi.org/10.1140/epja/i2019-12899-6

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