COHERENT BREMSSTRAHLUNG FROM KILOVOLT ELECTRONS IN ZONE AXIS ORIENTATIONS.

G. M. Reese, John Spence, N. Yamamoto

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

New experimental results are reported for type B coherent bremmstrahlung (CB) radiation from kilovolt electrons traversing thin crystals in zone axis orientations, obtained using an electron microscope and energy dispersive X-ray detector, approximately at right angles to the beam. These results are interpreted using the three-dimensional Bloch wave theory of multiple coherent electron scattering, which predicts coherent bremsstrahlung ('weak-beam radiation'), channeling radiation ('Pendelloesung radiation') and combinations thereof. Absent CB peaks are observed from the Laue zones in which all structure factors are zero. Doppler broadening is found to make the observation of channeling radiation satellites on CB peaks difficult. Closed-form expressions for 'resonant' CB are given.

Original languageEnglish (US)
Pages (from-to)697-716
Number of pages20
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Volume49
Issue number5
StatePublished - May 1984
Externally publishedYes

Fingerprint

bremsstrahlung
Radiation
Electrons
radiation
electrons
coherent radiation
coherent scattering
electron scattering
Coherent scattering
electron microscopes
Electron scattering
electron energy
Doppler effect
Crystal orientation
detectors
Electron microscopes
crystals
Satellites
Detectors
x rays

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics

Cite this

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title = "COHERENT BREMSSTRAHLUNG FROM KILOVOLT ELECTRONS IN ZONE AXIS ORIENTATIONS.",
abstract = "New experimental results are reported for type B coherent bremmstrahlung (CB) radiation from kilovolt electrons traversing thin crystals in zone axis orientations, obtained using an electron microscope and energy dispersive X-ray detector, approximately at right angles to the beam. These results are interpreted using the three-dimensional Bloch wave theory of multiple coherent electron scattering, which predicts coherent bremsstrahlung ('weak-beam radiation'), channeling radiation ('Pendelloesung radiation') and combinations thereof. Absent CB peaks are observed from the Laue zones in which all structure factors are zero. Doppler broadening is found to make the observation of channeling radiation satellites on CB peaks difficult. Closed-form expressions for 'resonant' CB are given.",
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AU - Spence, John

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N2 - New experimental results are reported for type B coherent bremmstrahlung (CB) radiation from kilovolt electrons traversing thin crystals in zone axis orientations, obtained using an electron microscope and energy dispersive X-ray detector, approximately at right angles to the beam. These results are interpreted using the three-dimensional Bloch wave theory of multiple coherent electron scattering, which predicts coherent bremsstrahlung ('weak-beam radiation'), channeling radiation ('Pendelloesung radiation') and combinations thereof. Absent CB peaks are observed from the Laue zones in which all structure factors are zero. Doppler broadening is found to make the observation of channeling radiation satellites on CB peaks difficult. Closed-form expressions for 'resonant' CB are given.

AB - New experimental results are reported for type B coherent bremmstrahlung (CB) radiation from kilovolt electrons traversing thin crystals in zone axis orientations, obtained using an electron microscope and energy dispersive X-ray detector, approximately at right angles to the beam. These results are interpreted using the three-dimensional Bloch wave theory of multiple coherent electron scattering, which predicts coherent bremsstrahlung ('weak-beam radiation'), channeling radiation ('Pendelloesung radiation') and combinations thereof. Absent CB peaks are observed from the Laue zones in which all structure factors are zero. Doppler broadening is found to make the observation of channeling radiation satellites on CB peaks difficult. Closed-form expressions for 'resonant' CB are given.

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