Abstract
The luminescence of Kr-Xe, Ar-Kr, and Ar-Xe mixtures was studied in the spectral range 300–970 nm when excited by 6Li (n, α)3 H nuclear reaction products in the core of a nuclear reactor. Lithium was deposited on walls of experimental cell in the form of a capillary-porous structure, which made it possible to measure up to a temperature of 730 K. The temperature dependence of the radiation intensity of noble gas atoms, alkali metals, and heteronuclear ionic noble gas molecules was studied. Also, as in the case of single-component gases, the appearance of lithium lines and impurities of sodium and potassium is associated with vaporization during the release of nuclear reaction products from the lithium layer. The excitation of lithium atoms occurs mainly as a result of the Penning process of lithium atoms on noble gas atoms in the 1s states and subsequent ion-molecular reactions. Simultaneous radiation at transitions of atoms of noble gases and lithium, heteronuclear ion molecules of noble gases allows us to increase the efficiency of direct conversion of nuclear energy into light.
Highlights
Academic Editor: Arkady Serikov e luminescence of Kr-Xe, Ar-Kr, and Ar-Xe mixtures was studied in the spectral range 300–970 nm when excited by 6Li (n, α)3 H nuclear reaction products in the core of a nuclear reactor
Introduction e study of optical radiation from a nuclear-excited plasma is interesting for developing a method of energy output from a nuclear reactor, systems for monitoring the parameters of nuclear reactors [1,2,3], as well as for the creation of one of diagnostics of high-temperature plasma in fusion reactors [4]. e direct excitation of gaseous media is carried out, as a rule, by the products of nuclear reactions with thermal neutrons of a nuclear reactor: 3He (n, p)3 H, 10B (n, α)7 Li, 235U (n, f ) F, or others [3]. e gaseous medium must contain 235U, 3He, or 10B, or a compound with these isotopes is applied to the walls of chamber
We studied the luminescence of Ar-Kr, KrXe, and Ar-Xe mixtures excited by the products of 6Li (n, α)3 H nuclear reaction. e temperature dependence of radiation at transitions of noble gas atoms, alkali metal atoms, and heteronuclear ionic noble gas molecules has been studied
Summary
Academic Editor: Arkady Serikov e luminescence of Kr-Xe, Ar-Kr, and Ar-Xe mixtures was studied in the spectral range 300–970 nm when excited by 6Li (n, α)3 H nuclear reaction products in the core of a nuclear reactor. Lithium was deposited on walls of experimental cell in the form of a capillary-porous structure, which made it possible to measure up to a temperature of 730 K. e temperature dependence of the radiation intensity of noble gas atoms, alkali metals, and heteronuclear ionic noble gas molecules was studied.
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