What could be the best way to smooth the spectrum (image attached)?

An emission spectrum in IR wavelength region consists of interference fringes (after spectral correction). How do I smooth such spectra? When collected through fiber, absorption around 950 nm...

06 July 2019 4,454 13 View

Change of oxidation state of 'Cr' in Al2O3 during interaction with ionizing radiation?

Ruby (Al2O3 doped with Cr3+ ions), when exposed to ionizing radiation (for e.g. X-rays), emits luminescence. What is the mechanism that causes this 'Radio-luminescence? Does Cr3+ accept electrons...

07 August 2018 3,409 5 View

Electron trapping in a defect at low temperature (7 K)?

Does trapping of electrons in a defect (trap) depend on temperature (below room temperature)? If yes, what are the possible reasons? I see that, these electrons appear to be trapped more (as well...

06 July 2018 2,164 10 View

In which condition, circular orbital motion of a satellite changes to elliptical?

If something causes final orbital speed of the satellite to be decreased (final orbital speed < initial orbital speed), why its circular motion changes to elliptical motion? Assuming that the...

01 February 2018 8,936 9 View

How do I correct spectra consisting fringes (possibly due to etalon effect)?

I have recorded PL spectra using CCD detector with the help of detection filter upon exciting the sample with a NIR laser. In these spectra, I see interference fringes (figure attached). I would...

01 February 2018 2,891 4 View

How can the presence of intrinsic and extrinsic defects be distinguished in a material?

If a material is supposed to be consisting of either intrinsic or extrinsic (or both) defects, how do they affect the physical characteristics of that material? Further, how one can differentiate...

11 December 2017 2,415 13 View

How to obtain Energy Levels of a doped element (unknown) in a host material theoretically?

How to determine energy levels theoretically in a material. A wide band gap material doped with impurities. Could it be a tool to cross check the results obtained experimentally?

10 November 2017 2,156 4 View

How to create an user defined function to fit thermal quenching equation in Origin ?

I am trying to fit a thermal quenching equation in the form of I=I0/(1+c*exp(-E/((1.38*10^(-23))*T))), to my data in origin software. I'm unable to create a function that runs and fits...

10 November 2017 6,076 10 View

What is the temperature effect on the PL resulting from an excited state (of an impurity) which lies in high or low density of CB tail states?

If an excited state is considered to be lying in either low or high density conduction band tail states, how the temperature will affect the PL emission from that state? Is above scene possible?...

10 November 2017 5,826 3 View

How to generate a very narrow, collimated light (laser) beam?

Is there any limit for generating narrow beam? How do I generate a narrow beam of 5 micron beam size?

09 October 2017 6,146 4 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

How to check the uv-vis absorption of nanoparticle by surface plasmon resonance?

I try to check the uv-vis absorption of Indium nanoparticle. Now I am measuring in solution, can I measure it in the form of a film?

01 March 2021 930 3 View

How to Eliminate cosine error and abbe error in LASER measurement system(for example Rhenishaw XL80)?

I like to do project in laser measurement system. My objective is to eliminate or reduce the cosine error, abbe error in Laser measurement system. I have Rhenishaw XL80 system. Please tell the...

28 February 2021 4,890 3 View

Why initial concentration of Pb not the same as calculated one when testing using AAS?

I am currently doing research on the adsorption of heavy metal using magnetic reduce graphene oxide. I use AAS to determine the concentration of the heavy metal. I prepare the Pb solution with...

26 February 2021 9,580 4 View

How to measure angle between laser travel path and machine axis in Laser Measurement system?

25 February 2021 1,987 3 View

Is this the write procedure for acid digestion of soil for heavy metal analysis using AAS?

How to do acid digestion of soil sample with 3:1 aquaregia in an open vessel?

23 February 2021 3,053 7 View

Can a semi-conductor material have different absorption coefficient?

Does the absorption coefficient of the semiconductor changes with the change in the structure of the semiconductor? If you have a thin film and nanowire of the same semiconductor, will the...

23 February 2021 9,799 4 View

How can I simulate the optical absorption spectrum of a biomaterial (like DNA or protein) in COMSOL?

I need to simulate the optical properties of a biomaterial, namely DNA, in COMSOL. Basically I need to simulate the IR absorption spectrum of a cylinder filled with a 'concentration' of DNA. I am...

21 February 2021 3,043 3 View

Interpretation of a fluorescence Emission spectrum ?

Hello, i work with a spectrometer which only render the fluorescence emission spectrum. Until now i just found how to interpret an exitation- and emission spectrum together to generate deeper...

20 February 2021 1,291 3 View

absorption= 1-mag(S(FP1:1,FP1:1)*S(FP1:1,FP1:1))-mag(S(FP2:1,FP1:1)*S(FP2:1,FP1:1)) is it correct for absorption ?

hi everyone I am simulating a unit cell structure in HFSS using Flouquet port having two modes for absorption I have used this formula:- absorption=...

17 February 2021 9,178 2 View