METHOD FOR DETERMINING INTEGRAL DISSIPATION CROSS-SECTION ATOMS AND MOLECULES Russian patent published in 1998 - IPC

FIELD: gas dynamics. SUBSTANCE: molecular beam is passed through calibrated opposing stream of dissipating gas. Concentrations of separate components of molecular beam, speed of the latter, and intensity of return stream of dissipating gas are measured. Integral dissipation cross-sections are found from set of equations , where Nkb

is intensity of return stream of dissipating gas; i=1,2,3...; M is number of molecular beam component; σ_i is integral cross- section of i-th component of molecular beam; nki is concentration of i-th component of molecular beam; n(r) is concentration of dissipating gas; τ is volume; dτ is volume element; is molecular beam speed; is dissipating gas speed; dσ/dΩ is differential cross-section of gas particle dissipation into solid angle dΩ supported by surface element dS. EFFECT: provision for determining dissipation cross-section for each separate component of molecular beam. 1 dwg