Measurement of cross-section of excitation transfer from 3s2 to 4s1 and 5s1 energy levels of neon

Collision induced non-radiative transitions in neon plasma have been studied using high intra-cavity radiation field of a 633 nm He-Ne laser. The transitions, induced from 3s 2 energy level to 4s1 and 5s1 groups of energy levels, have been detected as changes in intensities of the spectral lines originating from these energy levels. From these intensity measurements, the quantities governing the transitions i.e. (i)S 3 e /S 3RT , the ratio of the probabilities of electronic deexcitation to the total radiative deexcitation of energy level 3 (ii) 〈r 23 e v e〉, rate of excitation transfer per particle and (iii)S 23 e , the total probability for excitation transfer from level 2 to level 3 at a certain value of electron density have been calculated.