Learning the structure of giant resonances from their $\gamma$-decay
| Autor: | Lv, W. L., Niu, Y. F., Colò, G. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Phys. Rev. C 103, 064321 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevC.103.064321 |
| Popis: | The direct $\gamma$-decays of the giant dipole resonance (GDR) and the giant quadrupole resonance (GQR) of $^{208}$Pb to low-lying states are investigated by means of a microscopic self-consistent model. The model considers effects beyond the linear response approximation. The strong sensitivity of $\gamma$-decay to the isospin of the involved states is proven. By comparing their decay widths, a much larger weight of the $3_{1}^{-}$ component in the GQR wave function of $^{208}$Pb is deduced, with respect to the weight of the $2_{1}^{+}$ component in the GDR wave function. Thus, we have shown that $\gamma$-decay is a unique probe of the resonance wave functions, and a testground for nuclear structure models. Comment: 6 pages, 3 figures |
| Databáze: | arXiv |
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