X-ray parametric down-conversion in the Langevin regime.
Phys Rev Lett
; 109(1): 013602, 2012 Jul 06.
Article
in En
| MEDLINE
| ID: mdl-23031104
ABSTRACT
We experimentally and theoretically study the coincidence count rate for down-converted x-ray photons. Because of photoionization, parametric down-conversion at x-ray wavelengths generally involves loss and the theoretical description requires a Langevin approach. By working in a transmission geometry (Laue) rather than in the Bragg geometry of previous experiments, we obtain an improvement in the signal-to-noise ratio of 12.5, and find agreement between experiment and theory.
Search on Google
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2012
Document type:
Article