Rate for Laser-Induced Nuclear Dipole Absorption
| Autor: | Adriana Pálffy, Hans A. Weidenmüller, Paul-Gerhard Reinhard |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Quantum Physics Nuclear Theory 010308 nuclear & particles physics FOS: Physical sciences Rate equation Degree of coherence Laser 01 natural sciences Omega law.invention Pulse (physics) Nuclear Theory (nucl-th) Dipole law Research group A. Pálffy – Division C. H. Keitel 0103 physical sciences Absorption (logic) Physics::Atomic Physics Atomic physics Quantum Physics (quant-ph) 010306 general physics Energy (signal processing) |
| Zdroj: | Physical Review C |
| Popis: | Using the Brink-Axel hypothesis we derive the rate $R$ for nuclear dipole excitation by a laser pulse carrying $N \gg 1$ photons with average energy $\hbar \omega_0 \approx 5$ MeV. As expected $R \propto (\hbar \omega_0)^3$. The rate is also proportional to the aperure $\alpha$ of the laser pulse. Perhaps less expected is the fact that $R \propto N$, irrespective of the degree of coherence of the laser pulse. The expression for $R$, derived for a nearly stationary laser pulse, is valid also for short times and can, thus, be used in simulations via rate equations of multiple nuclear dipole excitations by a single pulse. The explicit dependence of $R$ on the parameters of the laser pulse and on nuclear parameters given in the paper should help to optimize experiments on laser-nucleus reactions. Comment: 12 pages, v2 slightly modified to match the published version |
| Databáze: | OpenAIRE |
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