Speaker
Description
The ultrashort pulse concept, known as "measurement-before-destruction," pioneers ultrafast probing of sensitive states by allowing signal capture before significant laser-induced changes occur. While Free-Electron Lasers (FELs) drive progress in attosecond X-ray generation for electron dynamics, the next frontier—time-resolved nuclear dynamics—demands sub-attosecond to zeptosecond pulses at MeV energies, a regime where standalone FELs face fundamental resource and physical limitations.
To overcome these barriers, we propose a novel methodology combining FEL technology with laser Compton scattering to generate ultrashort (hundreds of zeptoseconds) pulses with extremely high photon energies (MeV to hundreds of MeV). This approach effectively leverages Compton scattering to produce high-quality gamma rays while bypassing the pulse broadening caused by FEL slippage. This innovation offers the potential to investigate previously inaccessible level densities in compound nuclei and nuclei far from stability, and to advance studies in fundamental quantum measurement phenomena such as the Quantum Zeno and Anti-Zeno Effects, opening new possibilities beyond nuclear physics.
Funding Agency
This work was supported by the CAS Project for Young Scientists in Basic Research (YSBR-115) and National Natural Science Foundation of China (12435011).
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