Net ionization coefficient in boron trifluoride

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Abstract
Values of the net ionization coefficient λ1 in BF3 have been determined from spatial current growth measurements in uniform electric fields E over the range 1.07×10−15⩽E/N⩽17.0 ×10−15 V cm2 for gas densities N in the range 4.07×1016 ⩽N⩽348×1016 cm−3. For the limited range 1.07×10−15⩽E/N⩽1.70×10−15 V cm2, values of the ionization and effective attachment coefficients have also been determined. Within the limits of experimental uncertainty all the coefficients are found to be functions of E/N only. The limiting value of E/N at which λl=0 is found to be 1.13×10−15 V cm2.