Nuclear coherent population transfer with x-ray laser pulses

TL;DR

This paper explores the theoretical feasibility of using x-ray laser pulses to coherently transfer population between nuclear states, potentially enabling controlled energy release from nuclear states.

Contribution

It proposes a novel method for nuclear coherent population transfer using x-ray lasers and accelerated nuclei, outlining the required parameters and potential applications.

Findings

Complete nuclear population transfer achievable at high laser intensities

Optimal conditions involve specific laser intensities and nuclear acceleration

Potential for controlled energy release from nuclear states

Abstract

Coherent population transfer between nuclear states using x-ray laser pulses is studied. The laser pulses drive two nuclear transitions between three nuclear states in a setup reminding of stimulated Raman adiabatic passage used for atomic coherent population transfer. To compensate for the lack of $\gamma$-ray laser sources, we envisage accelerated nuclei interacting with two copropagating or crossed x-ray laser pulses. The parameter regime for nuclear coherent population transfer using fully coherent light generated by future X-Ray Free-Electron Laser facilities and moderate or strong acceleration of nuclei is determined. We find that the most promising case requires laser intensities of $10^{17}$-$10^{19}$ W/cm$^{2}$ for complete nuclear population transfer. As relevant application, the controlled pumping or release of energy stored in long-lived nuclear states is discussed.