Optical radiation from the sputtered species under gas excitation by the products of the 6Li(n,α)3H nuclear reaction

Emission of Noble Gases Binary Mixtures under Excitation by the Products of the 6Li (n, α)3 H Nuclear Reaction

“…e intensity of krypton and xenon lines initially decreases with temperature, as well as in the case of singlecomponent gases, and then again increases at temperatures above 500 K. e increase in intensities of the Kr and Xe lines is apparently associated with the dissociation of the molecular ions Ar + Xe and Kr + Xe, with participation of the formed Ar + (Kr + ) ions in the plasma-chemical processes in the mixture. Also, as in the case of a single-component noble gas [6], the appearance of intense radiation of alkali metal atoms has practically no effect on the intensity of the lines of 2p-1s transitions of a heavier noble gas. erefore, the main channel for transferring excitation to alkali metal atoms is the Penning process on noble gas atoms in 1s states.…”

“…As the temperature rises, lines of lithium, sodium, and potassium appear (Figure 3). e processes of the appearance of radiation on alkali metal lines in the case of single-component noble gases are described in [6]. When α-particles and tritium nuclei are released from the lithium layer, lithium vapors are formed at a partial pressure far exceeding the saturated vapor pressure.…”

“…e gaseous medium must contain 235 U, 3 He, or 10 B, or a compound with these isotopes is applied to the walls of chamber. In [5,6], to study the luminescence of gases in the core of a nuclear reactor at temperatures of 310-730 K, the products of 6 Li (n, α) 3 H nuclear reaction were used. e relatively large mean free path of tritium nuclei in lithium and gaseous media makes it possible to excite large volumes of gases and provide a larger amount of power deposited in the gas in comparison with the reaction products with 10 B.…”

“…An increase in temperature of gaseous medium to ∼500 K led to the appearance in the emission spectra of lines of alkali metals, lithium, and impurities of sodium and potassium. e appearance of these lines is associated with the evaporation of lithium under emission of α-particles and tritium nuclei from the deposited layer [6]. In single-component noble gases, the excitation of lithium atoms occurs as a result of the Penning process on metastable noble gas atoms (atoms in 1s states) [6].…”

“…e appearance of these lines is associated with the evaporation of lithium under emission of α-particles and tritium nuclei from the deposited layer [6]. In single-component noble gases, the excitation of lithium atoms occurs as a result of the Penning process on metastable noble gas atoms (atoms in 1s states) [6]. In the visible region, intense radiation from lithium atoms is added to the radiation at the 2p-1s transitions of noble gas atoms (Paschen's notation).…”