Coherent bremsstrahlung from kilovolt electrons in zone axis orientations

G. M. Reese; J. C.H. Spence; N. Yamamoto

doi:10.1080/01418618408233297

Coherent bremsstrahlung from kilovolt electrons in zone axis orientations

G. M. Reese, J. C.H. Spence, N. Yamamoto

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

New experimental results are reported for type B coherent bremsstrahlung (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’), channelling radiation (‘Pendellösung radiation’) and combinations thereof. Absent CB peaks are observed from Laue zones in which all structure factors are zero. Doppler broadening is found to make the observation of channelling radiation satellites on CB peaks difficult. Closed-form expressions for ‘resonant’ CB are given.

Original language	English (US)
Pages (from-to)	697-716
Number of pages	20
Journal	Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Volume	49
Issue number	5
DOIs	https://doi.org/10.1080/01418618408233297
State	Published - Nov 1984
Externally published	Yes

ASJC Scopus subject areas

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

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10.1080/01418618408233297

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 bremsstrahlung (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 ({\textquoteleft}weak-beam radiation{\textquoteright}), channelling radiation ({\textquoteleft}Pendell{\"o}sung radiation{\textquoteright}) and combinations thereof. Absent CB peaks are observed from Laue zones in which all structure factors are zero. Doppler broadening is found to make the observation of channelling radiation satellites on CB peaks difficult. Closed-form expressions for {\textquoteleft}resonant{\textquoteright} CB are given.",

author = "Reese, {G. M.} and Spence, {J. C.H.} and N. Yamamoto",

note = "Funding Information: This grant was made possible by NSF grant No. DMR8002108 and the facilities of the NSF National HREM Facility at Arizona State University.",

year = "1984",

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doi = "10.1080/01418618408233297",

language = "English (US)",

volume = "49",

pages = "697--716",

journal = "Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties",

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TY - JOUR

T1 - Coherent bremsstrahlung from kilovolt electrons in zone axis orientations

AU - Reese, G. M.

AU - Spence, J. C.H.

AU - Yamamoto, N.

N1 - Funding Information: This grant was made possible by NSF grant No. DMR8002108 and the facilities of the NSF National HREM Facility at Arizona State University.

PY - 1984/11

Y1 - 1984/11

N2 - New experimental results are reported for type B coherent bremsstrahlung (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’), channelling radiation (‘Pendellösung radiation’) and combinations thereof. Absent CB peaks are observed from Laue zones in which all structure factors are zero. Doppler broadening is found to make the observation of channelling radiation satellites on CB peaks difficult. Closed-form expressions for ‘resonant’ CB are given.

AB - New experimental results are reported for type B coherent bremsstrahlung (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’), channelling radiation (‘Pendellösung radiation’) and combinations thereof. Absent CB peaks are observed from Laue zones in which all structure factors are zero. Doppler broadening is found to make the observation of channelling radiation satellites on CB peaks difficult. Closed-form expressions for ‘resonant’ CB are given.

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Coherent bremsstrahlung from kilovolt electrons in zone axis orientations

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