Photofragmentation-laser induced fluorescence: a
... Rayleigh scatter from both gas phase molecules and aerosols. For the proposed PF-LIF system, the latter noise source, in principle, could be reduced to levels equal to or less than that of the PMT dark count via a combination of long wavelength chemical filters and solar blind PM tubes. The second s ...
... Rayleigh scatter from both gas phase molecules and aerosols. For the proposed PF-LIF system, the latter noise source, in principle, could be reduced to levels equal to or less than that of the PMT dark count via a combination of long wavelength chemical filters and solar blind PM tubes. The second s ...
IOSR Journal of Applied Physics (IOSR-JAP)
... fullerene and nanotubes into chemical composition of polymers gives one more opportunities for their study and application as composite materials, films, and fibers serving different purposes [13]. Plasma treatment have distinct advantages over other methods, modifications are limited to the surface ...
... fullerene and nanotubes into chemical composition of polymers gives one more opportunities for their study and application as composite materials, films, and fibers serving different purposes [13]. Plasma treatment have distinct advantages over other methods, modifications are limited to the surface ...
Fluorescence Quantum Yield Determinations. 9,lO
... quenching), a large 0-0 band overlap (possibility of selfabsorption), and a structured absorption spectrum. In spite of these drawbacks, its continued use is maintained largely due to its high quantum yield, the presence in the literature of values in a large number of solvents, and because it is on ...
... quenching), a large 0-0 band overlap (possibility of selfabsorption), and a structured absorption spectrum. In spite of these drawbacks, its continued use is maintained largely due to its high quantum yield, the presence in the literature of values in a large number of solvents, and because it is on ...
Author`s personal copy - Universidade Federal do Pará
... common to treat by quantum theory only solvent molecules near the solute. Hence the RDFs have a fundamental role in theoretical approach. To the system under basic pH conditions, the RDF of all first neighbors showed two well defined regions. In Fig. 2, the nearest region of the solute starting at 1.2 ...
... common to treat by quantum theory only solvent molecules near the solute. Hence the RDFs have a fundamental role in theoretical approach. To the system under basic pH conditions, the RDF of all first neighbors showed two well defined regions. In Fig. 2, the nearest region of the solute starting at 1.2 ...
Fiberoptic Sample Holder (FOSH): Characteristics and Uses APPLICATION NOTE 1056-201
... spring-loaded slide assembly of nested quartz tubes. The sample-holder components are almost entirely quartz, which minimizes the magnetic background signal from the sample holder. Samples are mounted in a small quartz bucket that has a quartz lid to hold them in place. The bucket has an inner diame ...
... spring-loaded slide assembly of nested quartz tubes. The sample-holder components are almost entirely quartz, which minimizes the magnetic background signal from the sample holder. Samples are mounted in a small quartz bucket that has a quartz lid to hold them in place. The bucket has an inner diame ...
Optical simulation of phosphor layer of white LEDs
... This paper mainly focuses on the correlative color temperature (CCT) distribution in different space areas while the surface of the phosphor layer of a white LED was prepared in different profiles. As mentioned in literature before, when an LED is manufactured with the traditional dispensing technol ...
... This paper mainly focuses on the correlative color temperature (CCT) distribution in different space areas while the surface of the phosphor layer of a white LED was prepared in different profiles. As mentioned in literature before, when an LED is manufactured with the traditional dispensing technol ...
Photoprocesses in protoplanetary disks
... where fuc is the oscillator strength for absorption from lower level c to upper level u and Zu the dissociation efficiency of state u, which lies between 0 and 1. The numerical value of the factor pe2/mc2 is 8.85 1021 in the adopted units with l in Å. The total photodissociation rate of a molecule ...
... where fuc is the oscillator strength for absorption from lower level c to upper level u and Zu the dissociation efficiency of state u, which lies between 0 and 1. The numerical value of the factor pe2/mc2 is 8.85 1021 in the adopted units with l in Å. The total photodissociation rate of a molecule ...
Inter-chromophore interactions in pigment-modified and dimer
... millisecond time scale implying that no charge separation to form potentially stable species (e.g. BL + QA − ) takes place on these time scales. The room temperature absorption and CD spectra of WT, the triple mutant and oxidized (P+ -containing) WT RCs are compared in Figure 1. The absorption spect ...
... millisecond time scale implying that no charge separation to form potentially stable species (e.g. BL + QA − ) takes place on these time scales. The room temperature absorption and CD spectra of WT, the triple mutant and oxidized (P+ -containing) WT RCs are compared in Figure 1. The absorption spect ...
Infrared absorption of holes in a parabolic quantum well M. Sundaram
... may be due to the nonparabolicity of the hole subband dispersion in k xy space, caused by the mixing of the heavy and light holes away from the zone center, and has been observed in optical measurements on 2D hole gases.23,24 On changing the gate voltage a series of transmittance spectra are obtaine ...
... may be due to the nonparabolicity of the hole subband dispersion in k xy space, caused by the mixing of the heavy and light holes away from the zone center, and has been observed in optical measurements on 2D hole gases.23,24 On changing the gate voltage a series of transmittance spectra are obtaine ...
chapter 8 optical pyrometry
... In this type of calibration [3], [4] the output of a primary pyrometer（i.e., one calibrated at the NBS) is compared with that of a secondary pyrometer (i.e., one to be calibrated) when the pyrometers are sighted alternately on a tungsten strip lamp operated at different brightnesses. Such lamps are ...
... In this type of calibration [3], [4] the output of a primary pyrometer（i.e., one calibrated at the NBS) is compared with that of a secondary pyrometer (i.e., one to be calibrated) when the pyrometers are sighted alternately on a tungsten strip lamp operated at different brightnesses. Such lamps are ...
Determination of bandwidth and beamwidth of a
... increasing pump power Ppump the output power of the laser increases linearly until saturation is reached. The maximal value for Ppump is estimated to be ≈ 13.8 kV. So in order to optimize the lasing process at all the pumping power should as well be taken into account as the optical components to fo ...
... increasing pump power Ppump the output power of the laser increases linearly until saturation is reached. The maximal value for Ppump is estimated to be ≈ 13.8 kV. So in order to optimize the lasing process at all the pumping power should as well be taken into account as the optical components to fo ...
Relation between nonlinear refractive index and
... From the physical point of view, the implications of expressions (15) and (16) discussed above can be considered to be hardly observable in real systems. In particular, there are not many examples of materials with a thirdorder susceptibility essentially real showing at the same time a strong absorp ...
... From the physical point of view, the implications of expressions (15) and (16) discussed above can be considered to be hardly observable in real systems. In particular, there are not many examples of materials with a thirdorder susceptibility essentially real showing at the same time a strong absorp ...
Get PDF - OSA Publishing
... One application is the possibility of generating pulling forces. Situations giving pulling forces for spheres in non-diffracting Bessel beams have been computed in acoustics [6–10] and in optics [11–13]. It was noticed early [6–8] that acoustical situations predicting to give negative forces corres ...
... One application is the possibility of generating pulling forces. Situations giving pulling forces for spheres in non-diffracting Bessel beams have been computed in acoustics [6–10] and in optics [11–13]. It was noticed early [6–8] that acoustical situations predicting to give negative forces corres ...
Fluorescence: Fluorescence studies prone to self
... The flurophore exists in some ground state (S0). A photon of energy hvEX is supplied by an external source such as an incandescent lamp or a laser and absorbed by the fluorophore. This creates an excited electronic singlet state (S1'). Excited-state lifetime: The excited state exists for a finite ti ...
... The flurophore exists in some ground state (S0). A photon of energy hvEX is supplied by an external source such as an incandescent lamp or a laser and absorbed by the fluorophore. This creates an excited electronic singlet state (S1'). Excited-state lifetime: The excited state exists for a finite ti ...
THE PHOTOSYNTHETIC EFFICIENCY OF PHYCOCYANIN IN
... points to our curve is evidence of the identity of the phycocyanin from Chroococcus and that which Svedberg and Katsurai isolated and crystallized from Aphanizomenon flos aquae (molecular weight about 200,000). The somewhat higher absorption of our curve in the blue may be due to the presence of a s ...
... points to our curve is evidence of the identity of the phycocyanin from Chroococcus and that which Svedberg and Katsurai isolated and crystallized from Aphanizomenon flos aquae (molecular weight about 200,000). The somewhat higher absorption of our curve in the blue may be due to the presence of a s ...
Chemistry Review: Strategies for the CRQ`s
... include information about both graphite and diamond. ...
... include information about both graphite and diamond. ...
Overview
... Energy Exchange Between Parallel Disc’s What is the flux from a Lambertain source of radiance L, onto a receive at distance r? We will first use point source approximations…..that is, we are at least 10 x the radius of the source (i.e., 1% error). ...
... Energy Exchange Between Parallel Disc’s What is the flux from a Lambertain source of radiance L, onto a receive at distance r? We will first use point source approximations…..that is, we are at least 10 x the radius of the source (i.e., 1% error). ...
Aalborg Universitet Absorption Efficiency of Receiving Antennas Andersen, Jørgen Bach; Frandsen, Aksel
... SUALLY, the scattering properties of receiving antennas are not considered, since most important antenna properties, such as pattern, gain, and impedance, are the same as those for transmitting antennas. However, there are a few situations where the scattering is of importance, and recently there ha ...
... SUALLY, the scattering properties of receiving antennas are not considered, since most important antenna properties, such as pattern, gain, and impedance, are the same as those for transmitting antennas. However, there are a few situations where the scattering is of importance, and recently there ha ...
User Guide for the FLS980 Integrating Sphere
... This Reference Guide helps you to use the Integrating Sphere Assembly, F-M01, which is an accessory to the FLS980 spectrometer. The integrating sphere has been designed for the measurement of the absolute fluorescence quantum yield of liquid samples, powders, films and bulk samples. The module can a ...
... This Reference Guide helps you to use the Integrating Sphere Assembly, F-M01, which is an accessory to the FLS980 spectrometer. The integrating sphere has been designed for the measurement of the absolute fluorescence quantum yield of liquid samples, powders, films and bulk samples. The module can a ...
fulltext - DiVA portal
... The principal part of my research have been focused on using soft X-ray spectroscopies for studies of the electronic structure in atoms and molecules involved in the nuclear waste cycle. In this chapter, soft X-ray spectroscopy and some physical background to facilitate understanding of the experime ...
... The principal part of my research have been focused on using soft X-ray spectroscopies for studies of the electronic structure in atoms and molecules involved in the nuclear waste cycle. In this chapter, soft X-ray spectroscopy and some physical background to facilitate understanding of the experime ...
Title Pressure effect on the eda
... Assumingthe K and s remained unchangedat high pressure, the relative increase in optical density would be about the square of the relative density of solvent since the EDA-complexdepends onh~upon the concentration; of two components..-1sshownin Fig. 5, the increase in the optical density with pressu ...
... Assumingthe K and s remained unchangedat high pressure, the relative increase in optical density would be about the square of the relative density of solvent since the EDA-complexdepends onh~upon the concentration; of two components..-1sshownin Fig. 5, the increase in the optical density with pressu ...
45.Z-scan measurement of the nonlinear refractive index of graphene
... A value of n2 ≃ 10−7 cm W−1 is obtained, which is approximately 109 times larger than that of bulk dielectrics. When the intensity is increased, starting from I > I sat ≈ 0.1 GW cm−2 , the change in the nonlinear phase ΔΦ saturates. In this high intensity regime, the exact modeling of the nonlinear ...
... A value of n2 ≃ 10−7 cm W−1 is obtained, which is approximately 109 times larger than that of bulk dielectrics. When the intensity is increased, starting from I > I sat ≈ 0.1 GW cm−2 , the change in the nonlinear phase ΔΦ saturates. In this high intensity regime, the exact modeling of the nonlinear ...
Pulsed Solid State Laser with Passive Q
... semiconductor lasers and optical fiber lasers. However, since these lasers employ very specialized technologies and design principles, they are usually treated separately from conventional solid-state lasers [1]. ...
... semiconductor lasers and optical fiber lasers. However, since these lasers employ very specialized technologies and design principles, they are usually treated separately from conventional solid-state lasers [1]. ...
Ab initio nanoplasmonics: The impact of atomic structure
... Rapid Communication is to analyze the impact of the atomic structure per se, in what follows we will work with nanodimers in which the underlying ionic structure of the two clusters is maintained when the distance between them is varied [40]. We consider Na clusters with two different atomic arrange ...
... Rapid Communication is to analyze the impact of the atomic structure per se, in what follows we will work with nanodimers in which the underlying ionic structure of the two clusters is maintained when the distance between them is varied [40]. We consider Na clusters with two different atomic arrange ...
The absorption factor of crystalline silicon PV cells: A
... The absorption factor of a PV cell is defined as the fraction of incident solar irradiance that is absorbed by the cell. This absorption factor is one of the major parameters determining the cell temperature under operational conditions. Experimentally the absorption factor can be derived from reflect ...
... The absorption factor of a PV cell is defined as the fraction of incident solar irradiance that is absorbed by the cell. This absorption factor is one of the major parameters determining the cell temperature under operational conditions. Experimentally the absorption factor can be derived from reflect ...
Atomic absorption spectroscopy
Atomic absorption spectroscopy (AAS) is a spectroanalytical procedure for the quantitative determination of chemical elements using the absorption of optical radiation (light) by free atoms in the gaseous state.In analytical chemistry the technique is used for determining the concentration of a particular element (the analyte) in a sample to be analyzed. AAS can be used to determine over 70 different elements in solution or directly in solid samples used in pharmacology, biophysics and toxicology research.Atomic absorption spectroscopy was first used as an analytical technique, and the underlying principles were established in the second half of the 19th century by Robert Wilhelm Bunsen and Gustav Robert Kirchhoff, both professors at the University of Heidelberg, Germany.The modern form of AAS was largely developed during the 1950s by a team of Australian chemists. They were led by Sir Alan Walsh at the Commonwealth Scientific and Industrial Research Organisation (CSIRO), Division of Chemical Physics, in Melbourne, Australia.Atomic absorption spectrometry has many uses in different areas of chemistry such as: Clinical analysis: Analyzing metals in biological fluids and tissues such as whole blood, plasma, urine, saliva, brain tissue, liver, muscle tissue, semen Pharmaceuticals: In some pharmaceutical manufacturing processes, minute quantities of a catalyst that remain in the final drug product Water analysis: Analyzing water for its metal content.↑ ↑ ↑