Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 30: Quanteneffekte

Q 30.3: Vortrag

Dienstag, 13. März 2012, 14:30–14:45, V7.03

Stimulated Raman adiabatic passage in nuclear systems — •Wen-Te Liao, Adriana Pálffy, and Christoph H. Keitel — Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg, Germany

Coherent population transfer between nuclear states using x-ray laser pulses is investigated. 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 [1]. With the astonishing breakthrough of operational x-ray free electron lasers (XFEL), photon energies reach already 10 keV [2] such that some low-lying nuclear transitions can already be laser-driven. However, most nuclear levels require higher photon energies.

To bridge the gap between x-ray laser frequency and nuclear transition energies, we envisage accelerated nuclei [3] 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 XFEL facilities and moderate or strong acceleration of nuclei is determined. We find that the most promising case requires laser intensities of 10¹⁷-10¹⁹ W/cm² for complete nuclear population transfer. As relevant application, the controlled pumping or release of energy stored in long-lived nuclear states is discussed.

[1] Wen-Te Liao, Adriana Pálffy, Christoph H. Keitel, Phys. Lett. B 705, 134 (2011).

[2] M. Altarelli et al., XFEL Technical Design Report, DESY (2006).

[3] T. J. Bürvenich et al., Phys. Rev. Lett. 96, 142501 (2006).