PRINCIPLES OF A NARROW BAND X-RAY DETECTOR

Abstract

An x-ray detector is described whose counting efficiency is of substantial value only between two narrowly separated and sharply defined limits. While the efficiency within these limits is not a full 100%, only rather moderate sacrifice in counting efficiency is required to obtain discrimination ratios of the order of one hundred or more. The principle of operation lies in the fact that the transmission and reflectance of materials of adjacent (or nearly adjacent) atomic number are both of substantial value for only a narrow band of energies, viz., those falling between the x-ray absorption edges of the two materials. A simplified mathematical treatment of this system is presented. A numerical example is also given for the case of transmission by silver (Z = 47) and reflection by palladium (Z = 46) and shows an upper limit of discrimination ratio of 400:1 for a bandwidth of 1.2 kev centered at approximately 25 kev energy. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 27, 1961
Accession Number
AD0260478

Entities

People

  • Joris M. Brinkerhoff

Tags

DTIC Thesaurus Topics

  • Absorbers (Materials)
  • Absorption
  • Advanced Materials
  • Bandwidth
  • Detectors
  • Discrimination
  • Efficiency
  • Engineered Materials
  • Materials
  • Metamaterials
  • Palladium
  • Plasmonic Materials
  • Reflectance
  • Reflection
  • X Rays
  • X-Ray Detectors

Fields of Study

  • Physics

Readers

  • Nuclear and Radiation Engineering.
  • Phased Array Antenna Design.
  • Theoretical Analysis.