Gaussian broadening

Gaussian broadening refers to broadening effects in spectral lines, these can be produced by Doppler broadening, This effect is similar to Gaussian blur effect in image processing produced by convolution with the Gaussian function, The term is named after Carl Friedrich Gauss This page was last edited on 23 March 2015, at 06:02 UTC, Text is available under the Creative Commons Attribution

Gaussian Broadning

Respected experts, I am trying to perform a Gaussian broadening on an energy spectrum obtained from NaI detector, The final result should convert “specrum,png” to a similar form of “Exp,png”, The method is explained in the “snap,jpg”, In “snap,jpg” each bin is converted in a gaussian where the “μ” is the mean, and sigma of the gaussian is a polynomial function dependent on

Lecture 6: Spectral Lineshapes

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Doppler broadening review Gaussian form Typical value This is a type of “Inhomogenous broadening”, i,e,, depends on specific velocity class of molecule 19 3, Voigt profiles 3,1, Dominant types of broadening T M mc kT D 7,17 10 / 2 ln2,s 2 0 7 0 1/2 2 1 FWHM g/mole of absorber/emitter

NIST: Atomic Spectros,

Doppler Broadening Doppler broadening is due to the thermal motion of the emitting atoms or ions, For a Maxwellian velocity distribution, the line shape is Gaussian; the …

Gaussian Energy Broadening Function of an HPGe Detector in

Abstract

Spectral line shape

Doppler broadening, This is caused by the fact that the velocity of atoms or molecules relative to the observer follows a Maxwell distribution, so the effect is dependent on temperature, If this were the only effect the line shape would be Gaussian, Pressure broadening Collision broadening,

Pulse Broadening – an overview

Consider first the case in which pulse broadening is dominated by the large spectral width σ ω of the source, For a Gaussian pulse, the broadening factor can be obtained from Eq, 3,3,16, Assuming that the contribution of the β 3 term is negligible together with C = 0 …

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Introduction

16, Line shapes

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Doppler broadening has a strong dependence, and weak T, m dependence since Tm / doesn’t vary as much over atmospheric temperatures and molecular weights, Gaussian widths add in quadrature from earlier noise discussion, although this doesn’t

科学网—PWSCF计算电声耦合常数

the gaussian broadening set in filePH/elphon,f90, These are useful, for convergence testing, input=al,elph,in,output=al,elph,out The results are also written into outputfiles “a2Fq2r,*”, one per value, of the gaussian broadening, for further use, 4 Bring tor-space both force constants and el-phon coefficients using “q2r,x” Output in files “a2Fmatdyn,*”, one per value of the gaussian

Dispersion-Induced Pulse Broadening – Fosco Connect

The broadening factor defined as σ/σ 0, where σ 0 is the rms width of the input Gaussian pulse , is given by where L is the fiber length, The foregoing discussion assumes that the optical source used to produce the input pulses is nearly monochromatic such that its spectral width satisfies Δ ω L << Δ ω 0 under continuous-wave [cw] operation, where Δ ω 0 is given by previous equation,

Appendix C: General Formula for Pulse Broadening

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Broadening The discussion of pulse broadening in Section 2,4 assumes the Gaussian-shape pulses and includes dispersive effects only up to the third order, In this appendix, a general formula is derived that can be used for pulses of arbitrary shape, Moreover, it makes

PDF Gaussian Broadening of MCNP Pulse Height Spectra

PDF , On Jan 1, 2004, W, A, Metwally and others published Gaussian Broadening of MCNP Pulse Height Spectra , Find, read and cite all the research you need on ResearchGate