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Measurement of optical gain in CO gas excited only by fission fragments

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2 Author(s)
McArthur, D. ; Sandia Laboratories, Albuquerque, NM, USA ; Tollefsrud, P.

Gain has been measured in high-density (∼ 0.5 amagat) CO gas, which was cooled to 77 K and excited with an intense burst of fission fragments induced by a fast-burst reactor (Sandia SPR II). Peak-gain coefficients l\sim 0.5 percent/cm were measured in pure CO over the wavelength range 5.1-5.33 \mu , for fission-fragment energy depositions ∼ 200 J/l. Interpreting the measured gains with an approximate steady-state vibrational distribution implies that \sim 25-70 percent of the fission-fragment energy deposited in the CO is appearing as excitation of the vibrational modes of the CO molecule.

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Quantum Electronics, IEEE Journal of  (Volume:12 ,  Issue: 4 )