English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Correction of beam hardening in X-ray radiograms

Bauer, M., Uhlmann, N., Pöschel, T., & Schröter, M. (2019). Correction of beam hardening in X-ray radiograms. Review of Scientific Instruments, 90(2): 025108. doi:10.1063/1.5080540.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0003-152A-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-152B-6
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Bauer, Manuel, Author
Uhlmann, Norman, Author
Pöschel, Thorsten, Author
Schröter, Matthias1, Author              
Affiliations:
1Group Statistical mechanics of granular media, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063310              

Content

show
hide
Free keywords: -
 Abstract: The intensity of a monochromatic X-ray beam decreases exponentially with the distance it has traveled inside a material; this behavior is commonly referred to as Beer-Lambert’s law. Knowledge of the material-specific attenuation coefficient μ allows us to determine the thickness of a sample from the intensity decrease the beam has experienced. However, classical X-ray tubes emit a polychromatic bremsstrahlung-spectrum. And the attenuation coefficients of all materials depend on the photon energy: photons with high energy are attenuated less than photons with low energy. In consequence, the X-ray spectrum changes while traveling through the medium; due to the relative increase in high energy photons, this effect is called beam hardening. For this varying spectrum, the Beer-Lambert law only remains valid if μ is replaced by an effective attenuation coefficient μeff which depends not only on the material but also on its thickness x and the details of the X-ray setup used. We present here a way to deduce μeff(x) from a small number of auxiliary measurements using a phenomenological model. This model can then be used to determine an unknown material thickness or in the case of a granular media its volume fraction.

Details

show
hide
Language(s): eng - English
 Dates: 2019-02-152019
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1063/1.5080540
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Review of Scientific Instruments
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Melville, NY : AIP Publishing
Pages: 10 Volume / Issue: 90 (2) Sequence Number: 025108 Start / End Page: - Identifier: ISSN: 0034-6748
CoNE: https://pure.mpg.de/cone/journals/resource/991042742033452