SEPARATION OF GASEOUS MIXTURES BY A NON-UNIFORM BARRIER
The effect of nonuniformity upon barrier performance is studied for an infinite plane barrier with a gas mfxture flowing across and through its face. The problem is treated by at perturbation method both for sinusoidal and for random fluctuation in the barrier characteristics. An exact solution is also given for sinusoidal fluctuations when the cross flow velocity vanishes. (auth) The charge exchange cross sections have been determined for a helium ion beam in several stopping gases. The cross sections for electron loss by a fast helium b 10/ are reported for emergies between 4 and 200 kev. The target gases studied were hydrogen, helium, nitrogen, oxygen, neon, and angon sigma /sub 01/ increases monotonically throughout the energy range for all gases studied, obtaining values of 10/sup -6/ cm/sup 2/ at 200 kev. In all stopping gases except helium, sigma /sub 10/passes through a maximum of approximately 3 x 10/ sup -16/ cm/sup 2/ near 50 kev, whereas for helium this cross section decreases throughout the energy range as expected for the resonant exchange reaction. Evidence is presented that the metastable excited state of the helium atom is of importance in the charge exchange process. (auth)
- Research Organization:
- Oak Ridge Gaseous Diffusion Plant, Tenn.
- DOE Contract Number:
- W-7405-ENG-26
- NSA Number:
- NSA-12-005461
- OSTI ID:
- 4333851
- Report Number(s):
- K-1311
- Country of Publication:
- United States
- Language:
- English
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