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The CREIL (Coherent Raman Effect on Incoherent Light) is a radiation transfer of ordinary incoherent light. It is based on ISRS (Impulsive Stimulated Raman Scattering) ISRS has been demonstrated in laboratories by using ultra-short light pulses. When two frequencies of light are pulsed in the same low pressure chamber, the 'warmer' of the two pulses exchanges energy with the 'cooler', resulting in frequency shifts of both pulses.

ISRS and CREIL obey the same theory, but very different parameters must be used to demonstrate the CREIL effect. In both processes light pulses must be ultra-short, that is "shorter than all relevant time constants". ISRS can be demonstrated in dense matter having infrared quadrupolar resonances. Ultra short burst of light at very high intensities must be used, and the frequency shift depends on the peak intensity of the light. In contrast, CREIL requires a low pressure gas with resonance stabilities in the megahertz range. Since the low pressure of the gas limits collisional scattering transitions, CREIL effects do not depend on the intensity of the light. Consequently, while the observation of CREIL in a lab would require a very long and expansive multi-path cell, ISRS is easily observed, confirming the common theory of both effects.

The CREIL mechanism was developed by Jacques Moret-Bailly.

• Brillouin scattering
• Compton scattering
• Raman effect
• Wolf effect

• Moret-Bailly, Jacques, Propagation of light in Low-Pressure Ionized and Atomic Hydrogen: Applications to Astrophysics, IEEE Trans. Plasma Sc. Vol.32, p.1, 2003 [1]

• Moret-Bailly, Jacques, Redshifts via "Coherent Raman Effect on time-Incoherent Light" (CREIL) American Physical Society, April Meeting, 2003, April 5-8, 2003

• Engelhardt, David; Moret-Bailly, Jacques, Abnormally Large Non-Doppler Red-Shifts from Quasars due to Coherent Raman Interactions (2003) American Physical Society, April Meeting, 2003, April 5-8, 2003

• Jensen, Jerry, Supernovae Light Curves: An Argument for a New Distance Modulus (2004) American Physical Society, April Meeting, 2004, May 1-4, 2004

• Moret-Bailly, Jacques; Jensen, Jerry; Michelot, Francoise, The Key to the Computation of the Spectra of the Quasars and Cosmic Acceleration (2004) American Physical Society, April Meeting, 2004, May 1-4, 2004,

• Gallo, C. F., Large Quasar Redshifts due to Non-Doppler, Non-Expansion Mechanism (2004) American Physical Society, April Meeting, 2004, May 1-4, 2004,

• Moret-Bailly, Jacques,[2] The parametric light-matter interactions in astrophysics.(2005)

• Moret-Bailly, Jacques,[3] Anomalous frequency shifts in the solar system. (2005)

• Jacques Moret-Bailly -- one of the main proponents of CREIL. The link contains many of his papers on CREIL as it applies to cosmology.