Emission of noble gases and their mixtures with lithium excited by the products of the 6Li(n,α)3H nuclear reaction

AbstractResearch results of luminescence spectra of noble gases and Ar–Xe, Ar–Kr, and Kr–Xe mixtures under the excitation by products of nuclear reaction in the core of a stationary nuclear reactor with 0.87 × 1014 n/cm2s thermal neutron flux are described in the article. The emission spectra of noble gases are similar to the obtained spectrum under the excitation by the 40Ar+7 ion beam from the DC-60 accelerator. Bands in spectra of the binary mixtures of noble gases are connected with the radiation on heteronuclear ion molecule transitions. The appearance of the lines of alkali metal atoms at the temperature increase of gas chamber is explained by sputtering of the lithium layer via nuclear reaction products as well as ionized and excited particles of the buffer gas.

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

Science and Technology of Nuclear Installations ◽

10.1155/2020/8891891 ◽

2020 ◽

Vol 2020 ◽

pp. 1-7

Author(s):

Kuanysh Samarkhanov ◽

Mendykhan Khasenov ◽

Erlan Batyrbekov ◽

Inesh Kenzhina ◽

Yerzhan Sapatayev ◽

...

Keyword(s):

Nuclear Reaction ◽

Nuclear Energy ◽

Alkali Metals ◽

Nuclear Reactor ◽

Noble Gases ◽

Noble Gas ◽

Direct Conversion ◽

Reaction Products ◽

Gas Molecules ◽

Sodium And Potassium

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.

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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

Eurasian Chemico-Technological Journal ◽

10.18321/ectj1079 ◽

2021 ◽

Vol 23 (2) ◽

pp. 95

Author(s):

K. Samarkhanov ◽

M. Khasenov ◽

E. Batyrbekov ◽

Yu. Gordienko ◽

Yu. Baklanova ◽

...

Keyword(s):

Kinetic Energy ◽

Nuclear Reaction ◽

Alkali Metals ◽

Nuclear Reactor ◽

Noble Gases ◽

Noble Gas ◽

Alpha Particles ◽

Ternary Mixtures ◽

Reaction Products ◽

Energy Excitation

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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Study of Luminescence in Noble Gases and Binary Kr-Xe Mixture Excited by the Products of 6Li(n,α)T Nuclear Reaction

Eurasian Chemico-Technological Journal ◽

10.18321/ectj821 ◽

2019 ◽

Vol 21 (2) ◽

pp. 115 ◽

Cited By ~ 2

Author(s):

K. Samarkhanov ◽

E. Batyrbekov ◽

M. Khasenov ◽

Yu. Gordienko ◽

Zh. Zaurbekova ◽

...

Keyword(s):

Energy Conversion ◽

Nuclear Reaction ◽

Nuclear Energy ◽

Optical Radiation ◽

Nuclear Reactor ◽

Noble Gases ◽

Reactor Core ◽

Surface Source ◽

Temperature Plasma ◽

By Products

At the present time the direct nuclear energy conversion into optical radiation is realized in gas media in which filling of energy levels takes place in the low-temperature plasma (nuclear-excited plasma) induced by ionizing radiation. The research of optical radiation of the nuclear-excited plasma induced by products of nuclear reactions is interest for development of an alternative outlet method of energy from the nuclear reactor, creation of control and regulating bodies for parameters of nuclear reactors as well as creation of one of diagnostics of high-temperature plasma in fusion reactors. The purpose of this work was to obtain new experimental data about processes of nuclear energy conversion into optical radiation with the optimal gas media having high coefficient of nuclear energy conversion into optical radiation and also with a possibility of outlet method of energy from the nuclear reactor core. In this article, description of the reactor experimental bench (LIANA) and the experiment scheme, the irradiating ampoule device (AD) with surface source of charged particles is provided, and the procedure of reactor experiment is presented. This paper presents the results of the reactor experiments of studying the spectral-luminescent characteristics of unary noble gases (Ne, Ar, Kr, Xe) and binary Kr-Xe gas mixture in a 200–975 nm spectral range with ionization gaseous media by products of 6Li(n,α)T nuclear reaction under irradiation at research water-cooled heterogeneous reactor (the IVG.1M).

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Emission spectra of noble gases and their mixtures under ion beam excitation

Laser and Particle Beams ◽

10.1017/s0263034616000616 ◽

2016 ◽

Vol 34 (4) ◽

pp. 655-662 ◽

Cited By ~ 5

Author(s):

M.U. Khasenov

Keyword(s):

Atomic Oxygen ◽

Noble Gases ◽

Ion Beam ◽

Emission Spectra ◽

Heavy Ion ◽

Luminescence Spectra ◽

Ultraviolet Region ◽

Oh Radical ◽

Excimer Molecule ◽

Beam Excitation

AbstractThe luminescence spectra of noble gases and their binary mixtures were measured using heavy ion beam excitation from a DC-60 accelerator. Spectra were measured in the range of 200–975 nm; the gas spectra were dominated by lines ofp–sandd–patomic transitions; in neon and argon, lines from atomic oxygen, N2, N2+, and OH radical bands were also observed. The ultraviolet region of the spectra was represented by a “third continuum” of noble gases. In krypton, the band of the KrO excimer molecule with a maximum at 557 nm was also observed. The maxima of the heteronuclear ionic molecules bands were located at wavelengths of 329 and 506 nm (Ar–Xe), 491 nm (Kr–Xe), and 642 nm (Ar–Kr). The relative intensities of the 2p–1stransitions of the noble gases atoms were measured and are discussed.

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NIR and Upconversion Luminescence Properties of Nd3+ Doped in Gd2O3-CaO-SiO2-B2O3 Glass System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.548-549.124 ◽

2014 ◽

Vol 548-549 ◽

pp. 124-128 ◽

Cited By ~ 1

Author(s):

S. Insiripong ◽

S. Kaewjeang ◽

U. Maghanemi ◽

H.J. Kim ◽

N. Chanthima ◽

...

Keyword(s):

Molecular Weight ◽

Optical Absorption ◽

Absorption Spectra ◽

Upconversion Luminescence ◽

Emission Spectra ◽

Concentration Quenching ◽

Luminescence Spectra ◽

Optical Absorption Spectra ◽

Glass Matrices ◽

Nir Luminescence

In this work, properties of Nd3+ in Gd2O3-CaO-SiO2-B2O3 glass systems with composition 25Gd2O3-10CaO-10SiO2-(55-x)B2O3-xNd2O3 where x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol% were investigated. The optical absorption spectra show peaks at 4F3/2 (877 nm) , 4F5/2+2H9/2 (802 nm), 4F7/2+4S3/2 (743 nm), 4F9/2 (682 nm), 2H11/2 (627 nm), 2G7/2 +4G5/2 (582 nm), 4G7/2 +2K13/2 (527 nm), 4G11/2 (481 nm), 2P1/2 (427 nm) and 2L15/2 + 4D1/2 + 1I11/2+ 4D5/2+ 4D3/2 (355 nm) reflecting the Nd3+ ions in glass matrices. The densities were increased with increasing of Nd2O3 concentration. This indicates the increase of the molecular weight by the replacement of B2O3 with a heavier Nd2O3 oxide in the glass. The upconversion luminescence spectra show bands at 393 nm for all Nd2O3 concentration and the strongest intensity from 2.5 % mol of Nd2O3 was obtained. For NIR luminescence, the intensity of Nd3+ emission spectra increases with increasing concentrations of Nd3+ up to 1.5 mol% and beyond 1.5 mol% the concentration quenching is observed.

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ELECTRON STRUCTURE INVESTIGATIONS OF InGaP/GaAs(100) HETEROSTRUCTURES WITH InP QUANTUM DOTS

International Journal of Nanoscience ◽

10.1142/s0219581x07004468 ◽

2007 ◽

Vol 06 (03n04) ◽

pp. 215-219

Author(s):

E. P. DOMASHEVSKAYA ◽

V. A. TEREKHOV ◽

V. M. KASHKAROV ◽

S. YU. TURISHCHEV ◽

S. L. MOLODTSOV ◽

...

Keyword(s):

Quantum Dots ◽

Emission Spectra ◽

Luminescence Spectra ◽

Partial Density ◽

Edge Structure ◽

X Ray ◽

Metal Organic ◽

Structure Investigations ◽

First Time ◽

Inp Quantum Dots

Ultrasoft X-ray emission spectra (USXES) and X-ray absorption near-edge structure (XANES) spectra with the use of synchrotron radiation in the range of P L2,3-edges were obtained for the first time for nanostructures with InP quantum dots grown on GaAs 〈100〉 substrates by vapor-phase epitaxy from metal–organic compounds. These spectra represent local partial density of states in the valence and conduction bands. The additional XANES peak is detected; its intensity depends on the number of monolayers forming quantum dots. Assumptions are made on the band-to-band origin of luminescence spectra in the studied nanostructures.

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In-Situ Ion Beam Measurements of Deuterium Loading in Thin Foil Electrochemical Cells

MRS Proceedings ◽

10.1557/proc-157-317 ◽

1989 ◽

Vol 157 ◽

Cited By ~ 1

Author(s):

J.A. Knapp ◽

T.R. Guilinger ◽

M.J. Kelly ◽

D. Walsh ◽

B.L. Doyle

Keyword(s):

Nuclear Reaction ◽

Ion Beam ◽

Cold Fusion ◽

Thin Foil ◽

Nuclear Reaction Analysis ◽

Deuterium Content ◽

Electrochemical Cells ◽

External Beam

ABSTRACTA key element of recent assertions of "cold fusion" has been the claim that electrochemical loading of deuterium into Pd electrodes can produce D:Pd levels exceeding 1:1. Using external beam nuclear reaction analysis of Pd foil electrodes in operating electrochemical cells, we have directly monitored deuterium content in-situ. No conditions were found which resulted in loadings higher than ∼0.9.

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