Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster III

A 26.18: Poster

Donnerstag, 17. März 2011, 16:00–18:30, P2

Nuclear coherent population transfer with x-ray laser pulses — •Wen-Te Liao, Adriana Pálffy, and Christoph H. Keitel — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

With present and upcoming light sources, the direct interaction between nuclei and super-intense laser fields has become feasible, opening the new field of nuclear quantum optics [1]. Inspired by atomic quantum optics techniques, we investigate the possibility of coherent nuclear population transfer between two ground states in a Λ-level scheme using two overlapping coherent x-ray light beams in a stimulated Raman adiabatic passage (STIRAP) setup [2]. The main question is under which conditions and parameters is control of nuclear states possible. We show that a truly coherent XFEL such as the future XFEL-Oscillator (XFEL-O) or seeded XFEL [3] to provide both probe and Stokes laser fields, together with acceleration of the target nuclei to achieve the resonance condition [1], allow for significant coherent nuclear population transfer at intensities within the present designed values. 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] T. J. Bürvenich, J. Evers and C. H. Keitel, Phys. Rev. Lett. 96 142501 (2006).

[2] W.-T. Liao, A. Pálffy, C. H. Keitel, arXiv:1011.4423.

[3] E. L. Saldin et al., Nucl. Instrum. Meth. A 475, 357 (2001); K.-J. Kim et al., Phys. Rev. Lett. 100 244802 (2008).