Thermal lens spectroscopy dosimetry at high doses using a commercial transparent glass

Almeida, Adriel S.; Rivera, Gerardo B.; Sousa, Claudevan A.; Santos, Francisco Eroni Paz dos; Souza, Divanízia do Nascimento

doi:10.1016/j.radmeas.2019.03.013

Cited by 9 publications

(3 citation statements)

References 26 publications

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“…As a rule, a probe beam is a continuous He–Ne laser. For the excitation source, gas (usually, argon ion) [ 28 , 29 , 30 , 31 ], diode [ 32 , 33 ], and solid-state (Ti:Sapphire) [ 7 , 27 , 34 ] lasers operating in the UV, visible, and IR ranges are used. Both pulsed [ 35 ], and cw sources [ 36 , 37 ] are applied.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Measurements of Thermophysical Parameters by Dual-Beam Thermal-Lens Spectrometry

2023

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Thermal-lens spectrometry is a sensitive technique for determination of physicochemical properties and thermophysical parameters of various materials including heterogeneous systems and nanoparticles. In this paper, we consider the issues of the correctness (trueness) of measurements of the characteristic time of the thermal-lens effect and, thus, of the thermal diffusivity determined by dual-beam mode-mismatching thermal lensing. As sources of systematic errors, major factors—radiation sources, sample-cell and detector parameters, and general measurement parameters—are considered using several configurations of the thermal-lens setups, and their contributions are quantified or estimated. Furthermore, with aqueous ferroin and Sudan I in ethanol as inert colorants, the effects of the intermolecular distance of the absorbing substance on the correctness of finding the thermophysical parameters are considered. The recommendations for checking the operation of the thermal-lens setup to ensure the maximum accuracy are given. The results obtained help reducing the impact of each investigated factor on the value of systematic error and correctly measure the thermophysical parameters using thermal-lens spectrometry.

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Section: Introductionmentioning

confidence: 99%

Accuracy of Measurements of Thermophysical Parameters by Dual-Beam Thermal-Lens Spectrometry

2023

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“…Figure 9 illustrates the thermal lens signal observed for films A4, A5, and A8 which were deposited onto glass substrates in atmospheres with different percentages of nitrogen. The thermal lens curves were fitted using the thermal lens model described by Almeida et al 49 . The pumped beam induces excitation, resulting in a phase shift in the probe beam.…”

Section: Resultsmentioning

confidence: 99%

Study of the Optoelectronic Properties of Titanium Nitride Thin Films Deposited on Glass by Reactive Sputtering in the Cathodic Cage

Madureira,

Monção,

Silva

et al. 2023

Mat. Res.

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We investigate the structural, optical, thermal-optical, and electronic properties of TiN x thin films utilizing a variety of experimental techniques, including spectroscopic ellipsometry, Raman spectroscopy, scanning electron microscopy, atomic force microscopy, thermal lens spectroscopy, and UV-VIS spectroscopy. Our experimental results indicate a remarkable metallic character in the TiN x thin films deposited under lower N 2 flow during treatment, as well as an increase in reflectance in the infrared region and thermal diffusivity as the partial N 2 flow is reduced, which is consistent with previous experimental studies. The microscopic origin of these trends is explained in terms of the atomic structure of the system, where Ti atoms contribute free carriers that interact with IR radiation and N atoms create imperfections in the lattice, causing greater scattering of phonons, respectively. The experimental results also indicate that the roughness of the films produced with a lower N 2 partial flow was lower than that of the films with a higher N 2 partial flow. To explain the deviation of optical properties from the ideal case, surface oxidation is also investigated. This facilitates the coating of smarting windows with TiNx thin films.

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“…Raj et al [93] used TLS to detect liquid paraffin oil in coconut oil. Almeida et al [94] have proposed TLS to be used in the dosimetry field. They studied the influence of the irradiation of commercial glasses with beta radiation and found that the TLS signal level depends linearly on the irradiation dose to which the studied material was exposed.…”

Section: Advances In Tlm and Tlsmentioning

confidence: 99%

Thermal lensing: outside of the lasing medium

Dobek

2022

Appl. Phys. B

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The thermal lens formed in a thermo-optical material as a result of its inhomogeneous heating, is a well-known phenomenon that has found widespread interest in the last decades, especially in the field of laser engineering and photo-thermal spectroscopy. In recent years, growing interest in the application of thermal lensing in different fields of optics and material studies has been observed. This review summarizes the latest efforts made by the scientific community to develop ways of using the phenomenon of thermal lensing. Its applications in spectroscopy, in laser beam formation and in imaging are described. The advantages and disadvantages of the thermal lensing in regard to these areas along with the potential future applications of the phenomenon are discussed.

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Thermal lens spectroscopy dosimetry at high doses using a commercial transparent glass

Cited by 9 publications

References 26 publications

Accuracy of Measurements of Thermophysical Parameters by Dual-Beam Thermal-Lens Spectrometry

Accuracy of Measurements of Thermophysical Parameters by Dual-Beam Thermal-Lens Spectrometry

Study of the Optoelectronic Properties of Titanium Nitride Thin Films Deposited on Glass by Reactive Sputtering in the Cathodic Cage

Thermal lensing: outside of the lasing medium

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