Showing papers by "Uzhhorod National University published in 1996"

Excitation of the B2Σg+1/2+ state of the HgBr* molecules in a gas-discharge plasma formed from a mixture of mercury dibromide and helium

Abstract: An experimental investigation was made of the formation of negative Br- ions in an HgBr2—He mixture used as the active medium in the earlier studies of the HgBr laser. The rate constant of the formation of Br- was (14–7)×10-11 cm3 c-1 in the range of E/N from 2×10-17 to 4×10-16 V cm2. A comparison of these results with our earlier theoretical data revealed a relationship between the products Br- and Br, e of the processes of excitation of the B2Σg+1/2+ state of the HgBr* molecules in a gas-discharge plasma formed from a nHgBr2-He mixture (with the degree of ionisation not exceeding 10-6). The electron excitation of the HgBr* molecules, resulting in the formation of Br-, occurred mainly at low values of E/N (below 3×10-17 V cm2); an increase in E/N reduced the fraction of Br- (compared with Br, e) and for E/N=4×10-16 V cm2, this fraction was ~1%.