Calculation of the trapping of hot electrons by repulsive centers under the conditions of a needle-type distribution function

The trapping coefficient of hot electrons repelled by a Coulomb center is calculated explicitly for a needle-shaped electron distribution function under conditions where the effective trapping cross section, along with the Sommerfeld factor, depends exponentially on the energy of the electron which has tunneled through the barrier. The criteria under which the effective Bonch-Bruevich cross section is valid are obtained. Fiz. Tekh. Poluprovodn. 31, 944–946 (August 1997)