Introduction

Zaidel’, A. N.; Prokof’ev, V. K.; Raiskii, S. M.; Slavnyi, V. A.; Shreider, E. Ya.

doi:10.1007/978-1-4757-1601-6_1

Cited by 11 publications

(16 citation statements)

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“…It should be noted that the atomic lines of most lanthanides are very weak compared to the lines of other metals. 37 For their reliable detection, it is necessary to use more efficient excitation of SL than is the case for suspensions in dodecane. In order to intensify, it was decided to carry out sonolysis of suspensions in a liquid medium, which provides a high degree of bubble compression during acoustic vibrations and the achievement of the highest temperature indicators, providing a high degree of plasma ionization, a high kinetic energy of colliding particles, and a high frequency of their collisions.…”

Section: Resultsmentioning

confidence: 99%

“…Sulfuric 38,39 and phosphoric 40 acids are among the media with the highest electronic temperatures achieved with m-SBSL, and it is these liquids that can provide the highest sensitivity in the search and registration of low-intensity lines for luminescence analysis. Indeed, the use of a suspension of a 70% H 2 SO 4 solution instead of dodecane as a dispersing medium made it possible to register Eu + lines (273, 281, 291, 321, 333, 369, 373, 382, 369, 373, 382, 391, 393, 397, 413, 421, 444, and 665 nm) and Eu (459, 463, 466, and 536 nm) identified according to the data of Zaidel et al 37 and Kramida et al 41 (Figure 4a).…”

Section: Resultsmentioning

confidence: 99%

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Single-Bubble Sonoluminescence of Colloidal Suspensions of Europium(II) Salt Nanoparticles

Gareev,

Abdrakhmanov,

Vasilyuk

et al. 2023

Appl Spectrosc

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Colloidal suspensions of EuCl2, EuBr2, and EuSO4 nanoparticles (<50 nm) in dodecane and EuSO4 in 70% H2SO4 were synthesized. Moving single-bubble sonoluminescence (m-SBSL) spectra were obtained for a bubble performing radial oscillations in these suspensions and translational motions at the antinode of a standing ultrasonic wave with a frequency of about 27 kHz. In these spectra (at a spectral resolution of 10 nm), the sono-excited luminescence bands of the Eu2+ ion were detected for the first time, coinciding in the shape and position of the maxima (404, 413, and 377 nm for EuCl2, EuBr2, and EuSO4, respectively) with the bands of Eu2+ located in a crystalline environment in the photoluminescence spectra of nanoparticles of europium salts in suspensions. The detected sonoluminescence of Eu2+ arises due to the injection of nanoparticles into a bubble deformed during motion and excitation of a lanthanide ion at the periphery of the bubble volume during collisions of nanoparticles with charged particles, mainly electrons, coming from a hot nonequilibrium plasma, which periodically arises during bubble compression. Evidence for the excitation of the europium ion in the bubble is the absence of its luminescence bands in the SBSL spectra of the translationally immobile bubble, in which nanoparticles are unlikely to enter. The nanoparticles that enter the bubble also undergo decomposition in the plasma into fragments, in particular, with the formation of Eu, Eu+ in the excited state. The atomic lines of these fragments were recorded for the first time in the m-SBSL spectrum with a resolution of 1 nm for a suspension of EuSO4 nanoparticles in 70% H2SO4. The resulting m-SBSL spectra will add to the library of characteristic spectra of objects of sonoluminescent spectroscopic analysis and will make it possible to identify and determine the content of Eu or Eu2+ in these objects.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Single-Bubble Sonoluminescence of Colloidal Suspensions of Europium(II) Salt Nanoparticles

Gareev,

Abdrakhmanov,

Vasilyuk

et al. 2023

Appl Spectrosc

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“…If the laser fre quency is much less the first resonant one, the dynamic polar izability is only weakly dependent on frequency and can be set to its static value α ij (0, R). For the O 2 and N 2 molecules, the absorption bands correspond to the photon energies higher than 5 eV and 12.5 eV, respectively [24]. Therefore, the form ulated above condition is satisfied for the IR frequencies of the laser radiation.…”

Section: Laser-modified Vibrational Parametersmentioning

confidence: 87%

Tunnel ionization of diatomic atmospheric gases (N₂, O₂) by laser radiation

Kopytin¹,

Kornev²,

Zon³

2019

Laser Phys.

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We present the results of calculation of the rates of tunnel ionization of N 2 and O 2 molecules from the ground and excited vibrational states by linearly polarized laser radiation. These data are necessary for the theoretical description of filamentation. For N 2 , we consider ionization from the 3σ g and 1π u shells, which give comparable contributions. For O 2 , we consider ionization from both the ground X 3 Σ − g and excited a 1 ∆ g electronic terms. We demonstrate that for N 2 , the ionization rate is maximum when the electric field vector of laser radiation is directed along the molecular axis (for 3σ g shell) or perpendicular to it (for 1π u shell), whereas for the O 2 molecule, for both electronic states considered, the rates have maxima when the angle between the electric field and molecular axis is equal to 45°.

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“…The detector design is based on an elemental nickel photocathode which has a work function of W F = 5.15 eV (Kaye and Laby 1978) (cut-off wavelength: ∼240 nm). Even though the quantum yield, η, for Ni is relatively low at the F 2 laser photon energy of 7.9 eV (η ∼ 1.8 × 10 −3 (Zaidel and Shreider 1970)) the predicted photosensitivity of S = ηe/ hν = 2.2 × 10 −4 A W −1 is more than adequate for use with powerful pulses. The use of a bulk metal for the photocathode leads to a very robust device that is capable of high current emission without the problems associated with thermally induced laser damage (Dyer et al 2001).…”

Section: Experimental Designmentioning

confidence: 96%

A simple fast-time-response photoemissive detector for vacuum ultraviolet (VUV) F₂lasers

Dyer

Snelling

Walton

2001

Meas. Sci. Technol.

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Introduction

Cited by 11 publications

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Single-Bubble Sonoluminescence of Colloidal Suspensions of Europium(II) Salt Nanoparticles

Single-Bubble Sonoluminescence of Colloidal Suspensions of Europium(II) Salt Nanoparticles

Tunnel ionization of diatomic atmospheric gases (N₂, O₂) by laser radiation

A simple fast-time-response photoemissive detector for vacuum ultraviolet (VUV) F₂lasers

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Introduction

Cited by 11 publications

References 0 publications

Single-Bubble Sonoluminescence of Colloidal Suspensions of Europium(II) Salt Nanoparticles

Single-Bubble Sonoluminescence of Colloidal Suspensions of Europium(II) Salt Nanoparticles

Tunnel ionization of diatomic atmospheric gases (N2, O2) by laser radiation

A simple fast-time-response photoemissive detector for vacuum ultraviolet (VUV) F2lasers

Contact Info

Product

Resources

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Tunnel ionization of diatomic atmospheric gases (N₂, O₂) by laser radiation

A simple fast-time-response photoemissive detector for vacuum ultraviolet (VUV) F₂lasers