Lasing on the 5s2 2D5/2→ 5p2P3/2Cd II ion transition upon sputtering of metal cadmium by nuclear particles

Mis’kevich, A. I.

doi:10.1070/qe2002v032n09abeh002295

Cited by 7 publications

(4 citation statements)

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“…Rapid growth in luminescence intensity is well approximated by the ratio: (8) where A -activation energy of this process. For the 610.4 nm lithium line, the value of A=1.58±0.15 eV was obtained.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the emission of alkali metal atoms when lithium is sputtering into a gas medium by the products of nuclear reaction is not associated with self-diffusion of excited atoms in lithium. In [8], the sharp temperature dependence of the intensity of the emission of cadmium atoms and ions upon irradiation of cadmium with α-particles is associated with self-diffusion in cadmium. Apparently, in the region of gas excitation, a density of metal vapor is formed that differs from the density of the saturated vapor.…”

Section: Resultsmentioning

confidence: 99%

“…Apparently, in the region of gas excitation, a density of metal vapor is formed that differs from the density of the saturated vapor. It can be assumed that a significant proportion of the metal in lithium is sputtered not only in the form of microdroplets [8,10], but also in the form of separate neutral atoms [20]. The direct contribution of released ions and excited atoms to the radiation is insignificant, as evidenced by the absence of noticeable optical radiation in a vacuum at a lithium layer temperature of 623 K. The intensity of lines of 2p-1s-transitions of noble gases increases with increasing temperature (see Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The luminescence spectra during lithium sputtering into a vacuum at room temperature of a target, irradiated with Xe + ions were studied in [7]. The processes leading to light emission during metal sputtering into a gaseous medium [5,8] differ from the sputtering processes in the vacuum [9]. Cadmium and zinc sputtering in the gaseous medium during irradiation by the products of nuclear reactions 3 He(n,p) 3 H, α-particles of 238 Pu decay and an electron beam were studied in [8,10,11].…”

Section: Introductionmentioning

confidence: 99%

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Optical Radiation from the Sputtered Species under Excitation of Ternary Mixtures of Noble Gases by the 6Li(n,α)3H Nuclear Reaction Products

Samarkhanov

Хасенов

Batyrbekov

et al. 2021

Eurasian Chem. Tech. J.

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The present paper examines the luminescence of ternary Ar-Kr-Xe and Ne-Ar-Kr mixtures of noble gases in the spectral range from 300 to 970 nm, excited by the 6Li(n,α)3H nuclear reaction products in the core of a nuclear reactor. A thin layer of lithium applied on the walls of the experimental device, stabilized in the matrix of the capillary-porous structure, serves as a source of gas excitation. During in-pile tests, conducted at the IVG.1M research reactor, thermal neutrons interact via the 6Li(n,α)3H reaction, and the emergent alpha particles with a kinetic energy of 2.05 MeV and tritium ions with a kinetic energy of 2.73 MeV excite gaseous medium. The study was carried out in a wide temperature range. The temperature dependence of the intensity of the emission of the atoms of noble gases and alkali metals, heteronuclear ionic molecules of noble gases were studied. The obtained values of the activation energy of the emission process 1.58 eV for lithium and 0.72 eV for potassium agree well with the known values of evaporation energy. Excitation of alkali metals atoms occurs consequently of the Penning process of alkali metals atoms on noble gas atoms in the 1s-states and further ion-molecular reactions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%