Pub Date : 2024-04-01DOI: 10.1134/s0030400x23070172
I. I. Tupitsyn, M. Y. Kaygorodov, D. A. Glazov, A. M. Ryzhkov, D. P. Usov, V. M. Shabaev
Abstract
A formula for calculating the relativistic electron localization function (RELF) within the framework of the Dirac–Fock method is obtained. An approach similar to that used earlier in [A.D. Becke and K.E. Edgecombe, The Journal of Chemical Physics 92, 5397 (1990)] in deriving an expression for the nonrelativistic electron localization function (ELF) is applied. It is demonstrated that the expression for RELF differs from the expression for ELF with replacement of the nonrelativistic electron density by its relativistic counterpart. Relativistic calculations of ELF and RELF for a number of superheavy elements are performed and the results are compared. By several examples it is shown that the ELF value equal to 0.5 does not necessarily correspond to the distribution density of homogeneous electron gas.
摘要 在狄拉克-福克方法的框架内获得了相对论电子局域函数（RELF）的计算公式。该方法类似于早先[A.D. Becke and K.E. Edgecombe, The Journal of Chemical Physics 92, 5397 (1990)]在推导非相对论电子定位函数（ELF）表达式时所使用的方法。结果表明，用相对论电子密度代替非相对论电子密度后，RELF 的表达式与 ELF 的表达式有所不同。对一些超重元素的 ELF 和 RELF 进行了相对论计算，并对结果进行了比较。通过几个例子表明，等于 0.5 的 ELF 值并不一定与均质电子气的分布密度一致。
{"title":"Application of the Relativistic Electron Localization Function to Study the Electronic Structure of Superheavy Elements","authors":"I. I. Tupitsyn, M. Y. Kaygorodov, D. A. Glazov, A. M. Ryzhkov, D. P. Usov, V. M. Shabaev","doi":"10.1134/s0030400x23070172","DOIUrl":"https://doi.org/10.1134/s0030400x23070172","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A formula for calculating the relativistic electron localization function (RELF) within the framework of the Dirac–Fock method is obtained. An approach similar to that used earlier in [A.D. Becke and K.E. Edgecombe, The Journal of Chemical Physics <b>92</b>, 5397 (1990)] in deriving an expression for the nonrelativistic electron localization function (ELF) is applied. It is demonstrated that the expression for RELF differs from the expression for ELF with replacement of the nonrelativistic electron density by its relativistic counterpart. Relativistic calculations of ELF and RELF for a number of superheavy elements are performed and the results are compared. By several examples it is shown that the ELF value equal to 0.5 does not necessarily correspond to the distribution density of homogeneous electron gas.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01DOI: 10.1134/s0030400x23100119
E. M. Kas’yanenko, A. I. Omel’chenko, O. I. Baum
Abstract
Regeneration of cartilaginous tissue and its shape change at laser exposure can be used as a basis for prospective medical operations, improving patient’s quality of life. The most important criterion of such operations success is a cell survival after laser exposure, therefore reduction of exposure duration and power is an important task at such methods development. Nanoparticles are actively used in medicine, and one of their intended usages is photothermal effect enhancement at laser exposure to biological tissue. However, articular tissue is quite resistant to foreign agents penetration, therefore the study of nanoparticles penetration capability and their impregnation effect is the priority task for achieving the desired medical effect. Optical coherence tomography (OCT) of gel phantoms and cartilaginous tissue of a joint, impregnated with nanoparticles, at laser exposure with erbium fiber laser with length wave of 1.56 μm is performed in this study. Articular cartilaginous tissue sections of three types (intact, with laser damage and after low laser exposure) were impregnated with nanoparticles of Fe3O4 for further study using OCT elastography. Increase of deformations, caused by heating of phantoms and tissue, impregnated with nanoparticles, is observed. OCT elastography data indicate the dependence of tissue deformation on previous tissue exposure history. The work substantiates increase of photothermal impact of laser exposure to tissue deformation at various nanoparticles introduction.
摘要 软骨组织的再生及其在激光照射下的形状变化可作为未来医疗手术的基础，从而改善患者的生活质量。此类手术成功与否的最重要标准是激光照射后细胞的存活率，因此缩短照射时间和降低照射功率是此类方法开发的重要任务。纳米粒子被广泛应用于医学领域，其用途之一是在激光照射生物组织时增强光热效应。然而，关节组织对外来物质的渗透有相当大的抵抗力，因此研究纳米粒子的渗透能力及其浸渍效果是实现预期医疗效果的首要任务。本研究使用长度为 1.56 μm 的铒光纤激光器对浸渍了纳米粒子的凝胶模型和关节软骨组织进行了光学相干断层扫描（OCT）。三种类型的关节软骨组织切片（完整、激光损伤和低激光照射后）都浸渍了纳米 Fe3O4 粒子，以便使用 OCT 弹性成像技术进行进一步研究。观察到浸渍了纳米粒子的模型和组织在加热后变形增加。OCT 弹性成像数据表明，组织变形与之前的组织暴露历史有关。这项研究证实了激光照射对组织变形的光热影响在不同纳米粒子引入时都会增加。
{"title":"Deformation Response of Biological Phantoms and Cartilaginous Tissue at Laser Exposure","authors":"E. M. Kas’yanenko, A. I. Omel’chenko, O. I. Baum","doi":"10.1134/s0030400x23100119","DOIUrl":"https://doi.org/10.1134/s0030400x23100119","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Regeneration of cartilaginous tissue and its shape change at laser exposure can be used as a basis for prospective medical operations, improving patient’s quality of life. The most important criterion of such operations success is a cell survival after laser exposure, therefore reduction of exposure duration and power is an important task at such methods development. Nanoparticles are actively used in medicine, and one of their intended usages is photothermal effect enhancement at laser exposure to biological tissue. However, articular tissue is quite resistant to foreign agents penetration, therefore the study of nanoparticles penetration capability and their impregnation effect is the priority task for achieving the desired medical effect. Optical coherence tomography (OCT) of gel phantoms and cartilaginous tissue of a joint, impregnated with nanoparticles, at laser exposure with erbium fiber laser with length wave of 1.56 μm is performed in this study. Articular cartilaginous tissue sections of three types (intact, with laser damage and after low laser exposure) were impregnated with nanoparticles of Fe<sub>3</sub>O<sub>4</sub> for further study using OCT elastography. Increase of deformations, caused by heating of phantoms and tissue, impregnated with nanoparticles, is observed. OCT elastography data indicate the dependence of tissue deformation on previous tissue exposure history. The work substantiates increase of photothermal impact of laser exposure to tissue deformation at various nanoparticles introduction.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140883108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01DOI: 10.1134/s0030400x23100181
A. V. Petrova, A. V. Sidorova, I. A. Sergeeva, G. P. Petrova
Abstract
Using the method of dynamic light scattering, it was found that the rate of collagen cleavage under the influence of bacterial collagenase decreases by almost 4 times when protein molecules are doped with Cr3+ ions, and when the enzyme activator of Zn2+ ions is added, it increases by 1.3 times. Based on the experimental data, the reaction rate constants k1 were calculated. It was found that when collagen molecules are tanned with a chromium salt, it becomes more resistant to degradation in solutions containing zinc ions than in solutions with the addition of calcium ions, as we described in earlier works.
{"title":"Evaluation of the Influence of Chromium and Zinc Ions on the Collagenolysis Process in Solutions by the Method of Dynamic Light Scattering","authors":"A. V. Petrova, A. V. Sidorova, I. A. Sergeeva, G. P. Petrova","doi":"10.1134/s0030400x23100181","DOIUrl":"https://doi.org/10.1134/s0030400x23100181","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Using the method of dynamic light scattering, it was found that the rate of collagen cleavage under the influence of bacterial collagenase decreases by almost 4 times when protein molecules are doped with Cr<sup>3+</sup> ions, and when the enzyme activator of Zn<sup>2+</sup> ions is added, it increases by 1.3 times. Based on the experimental data, the reaction rate constants <i>k</i><sub>1</sub> were calculated. It was found that when collagen molecules are tanned with a chromium salt, it becomes more resistant to degradation in solutions containing zinc ions than in solutions with the addition of calcium ions, as we described in earlier works.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01DOI: 10.1134/s0030400x2310003x
A. V. Belikov, Y. V. Fyodorova, A. D. Kozlova, S. N. Smirnov
Abstract
The possibility of active laser delivery of a modern chlorine-containing photosensitizing drug Chloderm (Chloderm, Russia) under the nail plate by laser radiation with a wavelength of 450 nm for the purpose of photodynamic therapy of onychomycosis is studied. In an in vitro experiment, sequential laser microporation of the nail plate and active delivery of the drug under the nail plate by this laser radiation with an intensity of up to 200 W/cm2 were investigated. The results of studying the absorption spectra of an aqueous solution of Chloderm in the range of 400–900 nm before and after exposure to 450 nm laser radiation are presented. It is demonstrated that sequential laser microporation and active laser drug delivery under the nail plate is possible at laser radiation intensity greater than 178 W/cm2. It is shown that the maximum rate and efficiency of nail plate ablation by 450 nm laser radiation is achieved at an intensity of 200 W/cm2 and is 2750 ± 30 μm/s and 1.47 ± 0.05 μm/mJ, respectively. The delivery rate of Chloderm under the nail plate is 1.15 ± 0.1 mg/s. It is shown that exposure to 450 nm laser radiation at the intensity of 200 W/cm2 for a time sufficient to deliver the drug under the nail plate does not change the extinction coefficient of the drug at the laser wavelength and slightly changes the conformational state of Chloderm.
{"title":"Laser Delivery and Spectral Study of a Modern Chlorine-Containing Drug for the Treatment of Onychomycosis at Laser Radiation with a Wavelength of 450 nm","authors":"A. V. Belikov, Y. V. Fyodorova, A. D. Kozlova, S. N. Smirnov","doi":"10.1134/s0030400x2310003x","DOIUrl":"https://doi.org/10.1134/s0030400x2310003x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The possibility of active laser delivery of a modern chlorine-containing photosensitizing drug Chloderm (Chloderm, Russia) under the nail plate by laser radiation with a wavelength of 450 nm for the purpose of photodynamic therapy of onychomycosis is studied. In an in vitro experiment, sequential laser microporation of the nail plate and active delivery of the drug under the nail plate by this laser radiation with an intensity of up to 200 W/cm<sup>2</sup> were investigated. The results of studying the absorption spectra of an aqueous solution of Chloderm in the range of 400–900 nm before and after exposure to 450 nm laser radiation are presented. It is demonstrated that sequential laser microporation and active laser drug delivery under the nail plate is possible at laser radiation intensity greater than 178 W/cm<sup>2</sup>. It is shown that the maximum rate and efficiency of nail plate ablation by 450 nm laser radiation is achieved at an intensity of 200 W/cm<sup>2</sup> and is 2750 ± 30 μm/s and 1.47 ± 0.05 μm/mJ, respectively. The delivery rate of Chloderm under the nail plate is 1.15 ± 0.1 mg/s. It is shown that exposure to 450 nm laser radiation at the intensity of 200 W/cm<sup>2</sup> for a time sufficient to deliver the drug under the nail plate does not change the extinction coefficient of the drug at the laser wavelength and slightly changes the conformational state of Chloderm.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140561813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01DOI: 10.1134/s0030400x23100090
V. E. Guseva, A. N. Nechay, A. A. Perekalov, N. N. Salashchenko, N. I. Chkhalo
Abstract
The article discusses the results of studying the emission spectra of liquid hexane C6H14, dichloromethane CH2Cl2, methylene bromide CH3Br upon excitation by pulsed laser radiation. We used a Nd:YAG laser, λ = 1064 nm, τ = 5.2 ns, Epulse = 0.8 J. The spectral range of 4–20 nm was studied. We used injector with a hole 225 μm in diameter, operating in a pulsed mode to form a liquid-droplet jet. The emission spectra of these liquid-jet targets were obtained. The obtained spectra were decoded, and the ions emitting in this spectral range were determined.
{"title":"Emission Spectra of Liquid-Jet Targets of Hexane C6H14, Dichloromethane CH2Cl2, Methylene Bromide CH3Br in the Range 4–20 nm under Pulsed Laser Excitation","authors":"V. E. Guseva, A. N. Nechay, A. A. Perekalov, N. N. Salashchenko, N. I. Chkhalo","doi":"10.1134/s0030400x23100090","DOIUrl":"https://doi.org/10.1134/s0030400x23100090","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article discusses the results of studying the emission spectra of liquid hexane C<sub>6</sub>H<sub>14</sub>, dichloromethane CH<sub>2</sub>Cl<sub>2</sub>, methylene bromide CH<sub>3</sub>Br upon excitation by pulsed laser radiation. We used a Nd:YAG laser, λ = 1064 nm, τ = 5.2 ns, <i>E</i><sub>pulse</sub> = 0.8 J. The spectral range of 4–20 nm was studied. We used injector with a hole 225 μm in diameter, operating in a pulsed mode to form a liquid-droplet jet. The emission spectra of these liquid-jet targets were obtained. The obtained spectra were decoded, and the ions emitting in this spectral range were determined.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140562097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01DOI: 10.1134/s0030400x23100168
V. G. Nikolaev
Abstract
Based on the one-dimensional Maxwell equations of electrodynamics of continuous medium, the balance ratios of electric and magnetic areas for problems solved in a finite region in space and time are obtained.
{"title":"On the Area of Extremely Short Electromagnetic Pulses in Medium for Problems of a Finite Integration Region","authors":"V. G. Nikolaev","doi":"10.1134/s0030400x23100168","DOIUrl":"https://doi.org/10.1134/s0030400x23100168","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Based on the one-dimensional Maxwell equations of electrodynamics of continuous medium, the balance ratios of electric and magnetic areas for problems solved in a finite region in space and time are obtained.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01DOI: 10.1134/s0030400x23100211
G. S. Shakurov, B. Z. Malkin, R. G. Batulin, A. G. Kiiamov
Abstract
EPR spectra of impurity Ho3+ ions in oriented SrY2O4 single-crystals are registered at the temperature 4.2 K in the frequency range from 70 to 180 GHz. The results of measurements evidence for the substitution of Ho3+ ions for the Y3+ ions at the structurally nonequivalent sites R1 and R2 with the local Cs point symmetry. The values of g-factors, hyperfine structure constants and the energy gaps between the ground and the first excited non-degenherate crystal-field sublevels of the ground 5I8 multiplet are determined. The observed specific features of the ground states of Ho3+ ions (non-Kramers doublets with the zero-field splittings of 4.30 and 1.67 cm–1) open a possibility to identify transitions in optical spectra of SrY2O4:Ho and inelastic neutron scattering spectra of SrHo2O4 crystals.
{"title":"Wide-Band EPR Spectroscopy of SrY2O4:Ho3+ Crystal","authors":"G. S. Shakurov, B. Z. Malkin, R. G. Batulin, A. G. Kiiamov","doi":"10.1134/s0030400x23100211","DOIUrl":"https://doi.org/10.1134/s0030400x23100211","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>EPR spectra of impurity Ho<sup>3+</sup> ions in oriented SrY<sub>2</sub>O<sub>4</sub> single-crystals are registered at the temperature 4.2 K in the frequency range from 70 to 180 GHz. The results of measurements evidence for the substitution of Ho<sup>3+</sup> ions for the Y<sup>3+</sup> ions at the structurally nonequivalent sites <i>R</i>1 and <i>R</i>2 with the local Cs point symmetry. The values of <i>g</i>-factors, hyperfine structure constants and the energy gaps between the ground and the first excited non-degenherate crystal-field sublevels of the ground <sup>5</sup><i>I</i><sub>8</sub> multiplet are determined. The observed specific features of the ground states of Ho<sup>3+</sup> ions (non-Kramers doublets with the zero-field splittings of 4.30 and 1.67 cm<sup>–1</sup>) open a possibility to identify transitions in optical spectra of SrY<sub>2</sub>O<sub>4</sub>:Ho and inelastic neutron scattering spectra of SrHo<sub>2</sub>O<sub>4</sub> crystals.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01DOI: 10.1134/s0030400x23100247
O. N. Tchaikovskaya, E. N. Bocharnikova, G. V. Mayer, V. I. Solomonov, A. S. Makarova, A. N. Orlov, V. V. Osipov, S. A. Chaikovsky
Abstract
The results of measuring the luminescence of ambient air and solutions of an organic compound during their irradiation with a high-current pulsed electron beam with an average energy of Ee = 170 keV and a duration of 2 ns, generated by the RADAN-303 accelerator, are presented. It is shown that, under such exposure, the transformation of dissolved bisphenol A occurs, which is accompanied by an increase in the absorption coefficient of the solution in the wavelength range of more than 300 nm and, as a consequence, a decrease in the intensity of air luminescence bands with an increase in the number of irradiation pulses. The results showed the degradation of the BPA solution to complete decomposition under the action of an electron beam treatment.
摘要 介绍了在 RADAN-303 加速器产生的平均能量为 Ee = 170 keV、持续时间为 2 ns 的大电流脉冲电子束照射下，测量环境空气和一种有机化合物溶液发光情况的结果。结果表明，在这种辐照条件下，溶解的双酚 A 会发生转变，伴随着溶液在 300 纳米以上波长范围内吸收系数的增加，空气发光带的强度也会随着辐照脉冲数的增加而降低。结果表明，在电子束的作用下，双酚 A 溶液降解至完全分解。
{"title":"Luminescent Studies of Bisphenol A Solutions under the Action of the Electron Beam","authors":"O. N. Tchaikovskaya, E. N. Bocharnikova, G. V. Mayer, V. I. Solomonov, A. S. Makarova, A. N. Orlov, V. V. Osipov, S. A. Chaikovsky","doi":"10.1134/s0030400x23100247","DOIUrl":"https://doi.org/10.1134/s0030400x23100247","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of measuring the luminescence of ambient air and solutions of an organic compound during their irradiation with a high-current pulsed electron beam with an average energy of <i>E</i><sub><i>e</i></sub> = 170 keV and a duration of 2 ns, generated by the RADAN-303 accelerator, are presented. It is shown that, under such exposure, the transformation of dissolved bisphenol A occurs, which is accompanied by an increase in the absorption coefficient of the solution in the wavelength range of more than 300 nm and, as a consequence, a decrease in the intensity of air luminescence bands with an increase in the number of irradiation pulses. The results showed the degradation of the BPA solution to complete decomposition under the action of an electron beam treatment.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140883103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01DOI: 10.1134/s0030400x23100223
E. Yu. Shamparov, A. L. Bugrimov, S. V. Rode, I. N. Jagrina
Abstract
The infrared transmission and reflection spectra of a series of samples of bismuth films of different thicknesses on identical single-crystal silicon substrates were measured. Transmission and reflection oscillations caused by interference on the film thickness are investigated. Properties of Si-plates are estimated. Refractive index and absorption index of bismuth are calculated.
{"title":"Ir Transparency of Thin Bismuth Films","authors":"E. Yu. Shamparov, A. L. Bugrimov, S. V. Rode, I. N. Jagrina","doi":"10.1134/s0030400x23100223","DOIUrl":"https://doi.org/10.1134/s0030400x23100223","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The infrared transmission and reflection spectra of a series of samples of bismuth films of different thicknesses on identical single-crystal silicon substrates were measured. Transmission and reflection oscillations caused by interference on the film thickness are investigated. Properties of Si-plates are estimated. Refractive index and absorption index of bismuth are calculated.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140562040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-01DOI: 10.1134/s0030400x23100144
A. G. Mirochnik, E. V. Fedorenko, A. Yu. Beloliptsev
Abstract
The processes of the formation of J-aggregates during the dissolution 2,2-difluoro-4,6-di(4'-methylphenyl)-1,3,2-dioxaborine crystals (1) and their subsequent dissociation have been studied by absorption and luminescence spectroscopy and quantum-chemical modeling. It is shown that two luminescent centers are observed in the solution 1: monomeric luminescence and luminescence of J-aggregates (dual luminescence). Evolution of absorption, excitation and luminescence spectra is observed over time, indicating a slow dissociation of J-aggregates.
{"title":"Luminescence of Boron Difluoride Ditoluoylmethanate. Formation of J-Aggregates","authors":"A. G. Mirochnik, E. V. Fedorenko, A. Yu. Beloliptsev","doi":"10.1134/s0030400x23100144","DOIUrl":"https://doi.org/10.1134/s0030400x23100144","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The processes of the formation of J-aggregates during the dissolution 2,2-difluoro-4,6-di(4'-methylphenyl)-1,3,2-dioxaborine crystals (<b>1</b>) and their subsequent dissociation have been studied by absorption and luminescence spectroscopy and quantum-chemical modeling. It is shown that two luminescent centers are observed in the solution <b>1</b>: monomeric luminescence and luminescence of J-aggregates (dual luminescence). Evolution of absorption, excitation and luminescence spectra is observed over time, indicating a slow dissociation of J-aggregates.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140561792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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