Оптика и спектроскопия最新文献_第5页

Особенности в кинетике затухания желтой люминисценции в кристаллах LiF-UO-=SUB=-2-=/SUB=- LiF-UO晶体中的黄色发光衰减动力学

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.01.54531.3869-22

Л. И. Щепина, Н. А. Иванов, Л.И. Ружников, А.А. Храмцова

引用次数: 0

Оптические свойства кристаллов семейства лангасита: La-=SUB=-3-=/SUB=-Ga-=SUB=-5-=/SUB=-SiO-=SUB=-14-=/SUB=-, La-=SUB=-3-=/SUB=-Ga-=SUB=-5.5-=/SUB=-Ta-=SUB=-0.5-=/SUB=-O-=SUB=-14-=/SUB=-, Ca-=SUB=-3-=/SUB=-TaGa-=SUB=-3-=/SUB=-Si-=SUB=-2-=/SUB=-O-=SUB=-14-=/SUB=-

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.05.55715.67-22

Екатерина Вячеславовна Забелина, Н. С. Козлова, О. А. Бузанов

{"title":"Оптические свойства кристаллов семейства лангасита: La-=SUB=-3-=/SUB=-Ga-=SUB=-5-=/SUB=-SiO-=SUB=-14-=/SUB=-, La-=SUB=-3-=/SUB=-Ga-=SUB=-5.5-=/SUB=-Ta-=SUB=-0.5-=/SUB=-O-=SUB=-14-=/SUB=-, Ca-=SUB=-3-=/SUB=-TaGa-=SUB=-3-=/SUB=-Si-=SUB=-2-=/SUB=-O-=SUB=-14-=/SUB=-","authors":"Екатерина Вячеславовна Забелина, Н. С. Козлова, О. А. Бузанов","doi":"10.21883/os.2023.05.55715.67-22","DOIUrl":"https://doi.org/10.21883/os.2023.05.55715.67-22","url":null,"abstract":"Optical properties of lanthanum-gallium silicate (La3Ga5SiO14), lanthanum-gallium tantalate (La3Ga5.5Ta0.5O14), calcium-tantalum-gallium silicate (Ca3TaGa3Si2O14) crystals in the near ultraviolet (UV) and visible wavelength ranges (200-800 nm) have been studied. For the first time the angles of deviation of the moments of the dipole transition spectral dependences theta(λ) were used to characterize the absorption processes in these crystals. These dependences make it possible to reveal absorption bands that are weakly noticeable on the transmission coefficients spectral dependences, and to estimate the degree of deviation of the dispersion dependence theta(λ) from the value theta=45o corresponding to an ideal ordered crystal. Analysis of theta(λ) dependencies showed that in the studied wavelength range, the lowest deviation from theta =45o is observed in Ca3TaGa3Si2O14, and the highest - in La3Ga5SiO14. The coefficients of the specific rotation angle of the polarization plane rho were obtained by the spectrophotometric interference method in polarized light. The measured values are best approximated by the Vyshin equation. For the first time, dependences of the modified Drude formula 1/rho=f(λ2) were calculated for these crystals. These dependences should be linear in case of an ideal crystal. The largest deviation from the linear dependence is observed for La3Ga5SiO14 crystals, and the lowest for Ca3TaGa3Si2O14. The discrete values of the refractive coefficients No and Ne were measured by the prism method. La3Ga5.5Ta0.5O14 crystals have the highest refractive coefficients, Ca3TaGa3Si2O14 crystals have the lowest. The obtained values are approximated by the Sellmeier equation.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"61 2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90132674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

О решении проблемы рассеяния света сфероидами для TM- и ТЕ-мод при использовании сфероидального базиса 在使用球体基线时，用球体体来解决光散射问题

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.01.54535.2894-22

В. Г. Фарафонов, В. Б. Ильин, Д.Г. Туричина

{"title":"О решении проблемы рассеяния света сфероидами для TM- и ТЕ-мод при использовании сфероидального базиса","authors":"В. Г. Фарафонов, В. Б. Ильин, Д.Г. Туричина","doi":"10.21883/os.2023.01.54535.2894-22","DOIUrl":"https://doi.org/10.21883/os.2023.01.54535.2894-22","url":null,"abstract":"Light scattering by spheroids plays an important role in various applications. The most efficient algorithm to calculate the optical properties of spheroids implies the field expansions in a special spheroidal basis, but its application is limited by three problems -- difficulties of computations of the spheroidal functions of complex arguments, the absent transition to the standard T-matrix, and loss of precision in complicated calculations for one case of the incident radiation polarization (TE mode). The first two difficulties have been recently overcome to a large extent, and in this work we solve the last problem -- by using T-matrix transformations, we find the way of expressing the TE mode solution through the more simple and stable TM mode solution. Numerical calculations performed by us demonstrate that the suggested approach improves the result accuracy by several orders, accelerates solution in several times and significantly extends its applicability range (up to the diffraction parameters exceeding 100).","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88434749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Кислородные дефекты в одностенных углеродных нанотрубках для источников излучения в ближнем инфракрасном диапазоне 单管碳纳米管中的氧缺陷，用于近红外波段的辐射源。

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.01.54547.4365-22

T.B. Ерёмин, B.A. Ерёмина, Е. Д. Образцова

引用次数: 0

Повышение эффективности генерации многозарядных ионов высоких энергий при взаимодействии фемтосекундных релятивистских лазерных импульсов со смешанными кластерами KrXe 通过与混合KrXe集群的费米秒激光脉冲相互作用，提高多电荷高能离子的效率

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.02.55010.12-23

Т.А. Семенов, И.М. Мордвинцев, С.А. Шуляпов, Д.А. Горлова, Андрей Викторович Лазарев, К. А. Иванов, М.С. Джиджоев, А. Б. Савельев, В.М. Гордиенко

引用次数: 0

Восстановление фазы волнового фронта на основе фотометрических и интерференционных измерений 光度和干涉测量恢复波阵相

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.02.55020.4412-22

Г. Г. Левин, В. Л. Минаев, А. А. Самойленко, Татьяна Владимировна Яковлева

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Протокол оптической памяти ROSE в волноводе кристаллa Tm : YAG Tm晶体波导中的ROSE光学内存协议:YAG

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.05.55716.74-22

М. М. Миннегалиев, Андрій Володимирович Павлов, К. И. Герасимов, Е.С. Моисеев, Н. Н. Скрябин, А. А. Калинкин, С. П. Кулик, Сергей Александрович Моисеев

引用次数: 0

Спектрально-люминесцентные характеристики растворенного органического вещества в меромиктических водоемах Кандалакшского залива Белого моря 白海坎大哈流域溶液有机物的光谱发光特征

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.06.55924.111-23

А.В. Харчева, Е. Д. Краснова, Д. А. Воронов, О.М. Горшкова, С. В. Пацаева

{"title":"Спектрально-люминесцентные характеристики растворенного органического вещества в меромиктических водоемах Кандалакшского залива Белого моря","authors":"А.В. Харчева, Е. Д. Краснова, Д. А. Воронов, О.М. Горшкова, С. В. Пацаева","doi":"10.21883/os.2023.06.55924.111-23","DOIUrl":"https://doi.org/10.21883/os.2023.06.55924.111-23","url":null,"abstract":"The optical properties of chromophoric dissolved organic matter (CDOM) of natural water have been studied by fluorescence spectroscopy and absorption spectroscopy. Samples of natural water from various depths from the meromictic lakes Trekhtzvetnoe and Elovoe were taken. The dependences of the quantum yield and the maximum of fluorescence emission on the excitation wavelength in a wide range of excitation wavelength variation (250...500 nm) for different horizons of stratified reservoirs are obtained. It is shown that the dependences of the maximum of the fluorescence emission on the excitation wavelength and the dependences of fluorescence quantum yield on the excitation wavelength in both lakes and at all depths studied are similar. On the other hand, the absolute value of the quantum yield differs in different layers of water. For example, the values of the fluorescence quantum yield took values from 1.4% to 2.4% at an excitation wavelength of 340 nm. The similar nature of the dependence of the fluorescence intensity on the excitation wavelength is explained by the common origin of DOM fluorophores in the studied horizons of stratified lakes. The different values of the fluorescence quantum yield are due to the difference in the proportion of aromatic compounds in the composition of the CDOM and are associated with differences in the hydrochemical characteristics of water at different horizons.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74694219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Влияние структурной организации нуклеиновых кислот на взаимодействие с гипохлоритом: АТФP, PolyA и ДНК 核酸结构组织对低氯酸盐作用的影响:atp、PolyA和dna

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.06.55922.113-23

Евгения Борисовна Морошкина, Д.Н. Осинникова, К.И. Павлова, А. М. Поляничко

{"title":"Влияние структурной организации нуклеиновых кислот на взаимодействие с гипохлоритом: АТФP, PolyA и ДНК","authors":"Евгения Борисовна Морошкина, Д.Н. Осинникова, К.И. Павлова, А. М. Поляничко","doi":"10.21883/os.2023.06.55922.113-23","DOIUrl":"https://doi.org/10.21883/os.2023.06.55922.113-23","url":null,"abstract":"The action of hypochlorite on various biological molecules in a living cell has been actively studied for years. However, the influence of the structural organization of nucleic acids on their interaction with hypochlorite remains underinvestigated. In this work, using ultraviolet and infrared spectroscopy, we analyzed the effect of the structure of nucleic acids on the reaction with hypochlorite using the example of the three most common and biologically significant types of nucleic acids (NA): double-stranded DNA in the B-form, single-stranded RNA, and nucleotide phosphates. It was found that the rate of the initial stage of the reaction of hypochlorite with endocyclic nitrogen atoms depends on the presence/absence of base pairing in the NA structure. At the same time, the polymeric structure of NC significantly accelerates and increases the efficiency of the subsequent stages of the reaction associated with the chlorination of exocyclic nitrogen atoms and the destruction of the ring structure of nitrogenous bases.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79762993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Диагностика вредных примесей в водных средах с помощью спектроскопических методов и алгоритмов машинного обучения 用光谱学方法和机器学习算法诊断水环境中的有害杂质

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.06.55915.106-23

А. О. Ефиторов, С. А. Доленко

引用次数: 0