2。 Electrons colliding with atoms will be accelerated again by the electric field, and some of them will reach the collecting electrode (not completely annihilated). With the increase of applied potential, the number of electrons reaching the collecting electrode after collision increases. Therefore, the valley current increases.
3。 If the number of electrons in the lowest excited state is equal to or greater than that in the ground state due to the excitation of thermal motion, then
The voltage corresponding to the first peak value is not equal to the first excitation bit. In this experiment, besides the inelastic collision between electrons and gas atoms, there are also elastic collisions and energy exchanges between gas atoms due to the collision of thermal motion. )
School of Mechanical Engineering
Mechanical design, manufacturing and automation specialty
(National first-class major,