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Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019最新文献

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Dielectric spectra of divalent rare-earth metal ions in LaF3 crystals 二价稀土金属离子在LaF3晶体中的介电光谱
Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019 Pub Date : 2021-07-27 DOI: 10.1063/5.0062750
A. Samborsky, E. Radzhabov
{"title":"Dielectric spectra of divalent rare-earth metal ions in LaF3 crystals","authors":"A. Samborsky, E. Radzhabov","doi":"10.1063/5.0062750","DOIUrl":"https://doi.org/10.1063/5.0062750","url":null,"abstract":"The dielectric spectra of LaF3 crystals activated by rare-earth ions Eu2+, Sm2+, and Yb2+, gradually cooled from 300 to 240 K, were investigated. Obtained experimental data were compared with experimental data obtained previously by other authors. The reorientation activation energies for RE2+ dipoles in LaF3 are 0.49, 0.55, 0.56, and 0.58 eV for Ba2+, Sm2+, Eu2+, and Yb2+, respectively. A reorientation of fluorine vacancy is observed, across the F1 positions.","PeriodicalId":296561,"journal":{"name":"Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129463831","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
X-ray luminescence in diamonds and its application in industry 钻石的x射线发光及其工业应用
Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019 Pub Date : 2021-07-27 DOI: 10.1063/5.0061972
V. Mironov, A. Emelyanova, S. Shabalin, E. V. Bubyr, L. V. Kazakov, E. F. Martynovich
{"title":"X-ray luminescence in diamonds and its application in industry","authors":"V. Mironov, A. Emelyanova, S. Shabalin, E. V. Bubyr, L. V. Kazakov, E. F. Martynovich","doi":"10.1063/5.0061972","DOIUrl":"https://doi.org/10.1063/5.0061972","url":null,"abstract":"A review of the results studies on luminescence of mainly natural diamonds under X-ray excitation is presented. Such luminescence of diamond crystals is widely used in separation of diamond-bearing ores in diamond mining industry. Diamonds contain numerous luminescence centers that can be excited by optical radiation. Photoluminescence (PL) is characterized by wide variety of properties. It is difficult to discern PL of diamonds from PL of accompanying minerals and provide sufficient extraction selectivity. The first comparative studies of the properties of X-ray excited luminescence (XL) and photoluminescence, carried out in the last century, showed the properties of XL are much less diverse. X-ray luminescence spectra of most natural diamonds contain mainly one band, so-called A-band, visually perceived as blue emission. Spectral bands and lines observed in photoluminescence appear additionally in XL spectra of some samples. Some samples do not exhibit A-band in XL. The specific properties of XL of diamonds determined the capability of usage of XL in separation of diamond-bearing ores. In the mid-sixties, an idea stating the donor-acceptor process of emission of the A-band under X-ray excitation had appeared. This idea has been disputed on the basis of detailed study of kinetics and other properties of XL, but the concept of the donor-acceptor process has been circulating in various publications for several decades. The review presents the temperature dependences of the decay time constants of individual components of X-ray excited luminescence, which as a whole should be considered as the temperature-time passport of the A-band. The article provides data on the practical use of luminescence in the separation of diamond ores, provides some information on the design of separators.","PeriodicalId":296561,"journal":{"name":"Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133276321","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: 6
Infrared absorption spectra of LiF and NaF crystals depending on the conditions of crystal growth and radiation treatment LiF和NaF晶体的红外吸收光谱取决于晶体生长条件和辐射处理
Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019 Pub Date : 2021-07-27 DOI: 10.1063/5.0061996
L. Bryukvina, D. S. Glazunov
{"title":"Infrared absorption spectra of LiF and NaF crystals depending on the conditions of crystal growth and radiation treatment","authors":"L. Bryukvina, D. S. Glazunov","doi":"10.1063/5.0061996","DOIUrl":"https://doi.org/10.1063/5.0061996","url":null,"abstract":"This work is devoted to studies of the efficiency of creation and diversity of molecular complexes with the strong hydrogen bond OHF in γ-irradiated LiF and NaF crystals depending on the type of magnesium-hydroxyl impurity complexes. Infrared (IR) spectroscopy studies have shown that the concentration of Mg2+OH¯OH¯Vc¯ complexes increases as the percentage of magnesium added to the melt increases. Increase in the concentration of Mg2+ OH¯OH¯Vc ¯complexes leads to increase in the intensity of the IR bands in the region of 3550–3700 cm–1 in unirradiated crystals. As a result, the radiation-induced IR bands of complexes with a strong hydrogen bond in the range of 1600–2400 cm−1 are shifted towards lower frequencies. The radiation-induced IR bands of complexes with strong hydrogen bond OHF in the region of 1600–2400 cm−1 are shifted towards high frequencies in the presence of a hydroxyl impurity in the crystal in the form of “free” OH¯ ions with the absorption band at νmax = 3730 cm-1. Such shifts also occur at different irradiation doses.","PeriodicalId":296561,"journal":{"name":"Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122173309","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
The formation of surface periodic structures based on alkali halide crystals containing metal nanoparticles by ion implantation 离子注入含金属纳米粒子的碱卤化物晶体表面周期结构的形成
Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019 Pub Date : 2021-07-27 DOI: 10.1063/5.0062087
V. P. Dresvyanskiy, V. Paperny, A. Chernykh, A. L. Rakevich, E. Martynovich
{"title":"The formation of surface periodic structures based on alkali halide crystals containing metal nanoparticles by ion implantation","authors":"V. P. Dresvyanskiy, V. Paperny, A. Chernykh, A. L. Rakevich, E. Martynovich","doi":"10.1063/5.0062087","DOIUrl":"https://doi.org/10.1063/5.0062087","url":null,"abstract":"The results of the study of the parameters of the surface layer of a LiF crystal irradiated by Ag or Cu ion beam through a metal mask in the form of a grid with a period of 7 µm are presented. It was shown that a composite layer with a thickness of 3–5 µm is formed in the crystal in the form of a periodic structure containing F2 and F3+ color centers and (sub)nanometer metal particles. A diffraction pattern is observed on this structure upon irradiation with a laser beam.","PeriodicalId":296561,"journal":{"name":"Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129277056","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
Luminescence of single color centers created in LiF crystals at low dose of irradiation 低剂量照射下LiF晶体单色中心的发光
Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019 Pub Date : 2021-07-27 DOI: 10.1063/5.0061959
E. F. Martynovich, R. A. Taziev, V. P. Dresvyanskiy, A. L. Rakevich
{"title":"Luminescence of single color centers created in LiF crystals at low dose of irradiation","authors":"E. F. Martynovich, R. A. Taziev, V. P. Dresvyanskiy, A. L. Rakevich","doi":"10.1063/5.0061959","DOIUrl":"https://doi.org/10.1063/5.0061959","url":null,"abstract":"Color centers, found in lithium fluoride crystals grown in a reducing atmosphere and irradiated with a low dose of X-ray radiation, emit spectral luminescence band with maximum λmax = 800 nm and decay time constant of 26.5 ± 1 ns at room temperature. As the radiation dose increases, the concentration of these centers quickly saturates, while the concentrations of known intrinsic color centers continue to increase. This indicates the impurity nature of these color centers. The trajectories of the luminescence intensity and the decay time constants of single centers of this type were investigated. The luminescence is of flickering character. The temporal characteristics of the trajectories of luminescence intensity for different centers of the same type are different, while their decay time constants are the same. Similar pattern was revealed for the F2 color centers. These properties of single color centers in monocrystals are discussed.","PeriodicalId":296561,"journal":{"name":"Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123611277","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
Luminescent properties of BaBrI:Sm2+ scintillation crystals BaBrI:Sm2+闪烁晶体的发光特性
Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019 Pub Date : 2021-07-27 DOI: 10.1063/5.0061794
D. Sofich, R. Shendrik, A. Rusakov, A. Shalaev, A. Myasnikova
{"title":"Luminescent properties of BaBrI:Sm2+ scintillation crystals","authors":"D. Sofich, R. Shendrik, A. Rusakov, A. Shalaev, A. Myasnikova","doi":"10.1063/5.0061794","DOIUrl":"https://doi.org/10.1063/5.0061794","url":null,"abstract":"The optical spectra of BaBrI crystals activated by divalent samarium were studied. The samples exhibit bright luminescence in the red region of spectra due to 4f6–4f6 and 4f55d1–4f6 transitions of Sm2+ ions. Luminescence exhibits strong temperature dependence in the range 7–300 K. At low temperatures, luminescence associated with parity-forbidden 4f6–46f transitions from 5D0 and 5D1 states is observed. Coloring of the crystals after irradiation by ultraviolet light and long afterglow luminescence of BaBrI:Sm2+ were detected.","PeriodicalId":296561,"journal":{"name":"Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124407156","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
The role of impurity magnesium complexes in formation efficiency of F2+ laser color centers in LiF crystals 杂质镁配合物对LiF晶体中F2+激光色中心形成效率的影响
Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019 Pub Date : 2021-07-27 DOI: 10.1063/5.0061993
L. Bryukvina, N. Ivanov, D. S. Glazunov
{"title":"The role of impurity magnesium complexes in formation efficiency of F2+ laser color centers in LiF crystals","authors":"L. Bryukvina, N. Ivanov, D. S. Glazunov","doi":"10.1063/5.0061993","DOIUrl":"https://doi.org/10.1063/5.0061993","url":null,"abstract":"Two types of thermally unstable U1 centers are created in LiF:Mg,OH crystals by γ−irradiation at low temperatures. One of them is influenced by impurity complexes containing magnesium ions Mg2+. Another type of U1 center is perturbed by impurities of OH¯ ions. Temporal dynamics of conversion of U1 centers and F2+ and F2+** color centers after crystal was heated from temperature of 80 K to 300 K is presented.","PeriodicalId":296561,"journal":{"name":"Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130720975","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
Theoretical estimation of local heating during laser filamentation in LiF crystal LiF晶体激光成丝过程中局部加热的理论估计
Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019 Pub Date : 2021-07-27 DOI: 10.1063/5.0063167
A. V. Kuznetsov, V. P. Dresvyanskiy
{"title":"Theoretical estimation of local heating during laser filamentation in LiF crystal","authors":"A. V. Kuznetsov, V. P. Dresvyanskiy","doi":"10.1063/5.0063167","DOIUrl":"https://doi.org/10.1063/5.0063167","url":null,"abstract":"A theoretical estimation of local heating of a material during single and multiple filamentation of series of femtosecond laser pulses in a LiF crystal is obtained.","PeriodicalId":296561,"journal":{"name":"Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126079548","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
Fluorescent carbon quantum dots formed from glucose solution by microplasma treatment 用微等离子体处理葡萄糖溶液形成荧光碳量子点
Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019 Pub Date : 2021-07-27 DOI: 10.1063/5.0061798
A. Tyutrin, R. Wang, E. F. Martynovich
{"title":"Fluorescent carbon quantum dots formed from glucose solution by microplasma treatment","authors":"A. Tyutrin, R. Wang, E. F. Martynovich","doi":"10.1063/5.0061798","DOIUrl":"https://doi.org/10.1063/5.0061798","url":null,"abstract":"Carbon quantum dots (CQDs) were synthesized of glucose solution by microplasma treatment at atmospheric pressure and room temperature. The spectral-kinetic properties of the synthesized CQDs were studied use of MicroTime 200 confocal scanning luminescence microscope. СQDs have a wide emission spectrum in 400–750 nm area when excited by light with wavelength in the 375–530 nm range. CQD exhibit a bright radiation in the blue range. The concentration of quantum dots was controlled by varying the time of microplasma treatment of glucose solution. The time-resolved fluorescence decay curve was measured by the time-correlated single photon counting (TCSPC) method. Studies of luminescence kinetics revealed three exponential components with decay time constants equal to 0.65, 2.2, and 6.2 ns. The formation of these components is presumably associated with the quantum confinement effect and with presence of different functional groups between which quantum transitions take place.","PeriodicalId":296561,"journal":{"name":"Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129398921","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
Model of filamentation of train of femtosecond laser pulses in solid dielectric with account of heat accumulation 考虑热积累的飞秒激光脉冲串在固体介质中的成丝模型
Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019 Pub Date : 2021-07-27 DOI: 10.1063/5.0063168
A. V. Kuznetsov, V. P. Dresvyanskiy
{"title":"Model of filamentation of train of femtosecond laser pulses in solid dielectric with account of heat accumulation","authors":"A. V. Kuznetsov, V. P. Dresvyanskiy","doi":"10.1063/5.0063168","DOIUrl":"https://doi.org/10.1063/5.0063168","url":null,"abstract":"A numerical model of filamentation of train of femtosecond laser pulses in solid transparent dielectrics accounting for heat accumulation is developed.","PeriodicalId":296561,"journal":{"name":"Luminescence and Laser Physics: XVII International Conference on Luminescence and Laser Physics – LLPh 2019","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122554197","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
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