2025/04/26 by Weitao Liu, Liu, Weitao, Yuanbin Wu +1 · 1 citation
Physics and Astronomy · #Nuclear physics research studies #Laser-Plasma Interactions and Diagnostics #Quantum chaos and dynamical systems
paper · pdf · doi:10.48550/arxiv.2504.18828
The multi-photon excitation to the 8-eV nuclear isomeric state 229mTh in the direct laser-nucleus interaction is investigated theoretically. We solve the time-dependent Schrödinger equation with the method which allows us to study the n-photon absorption in the nuclear excitation in the direct laser-nucleus interaction. Based on the laser facilities available currently or in the near future, we analyze the impact of the laser parameters on the excitation probability of the multi-photon excitation. The possibilities of the 2-, 3- and 4-photon excitations to the isomeric state 229mTh from the ground state are discussed in details. Our results show the strong impact of the laser intensity and pulse duration on the multi-photon excitation probability. The onset of high-order effects in the multi-photon excitation in the direct laser-nucleus interaction is also revealed. Our findings open new possibilities to study the multi-photon laser-nucleus interaction in high-power laser facilities.