Phys. Rev. Lett. 89, 094801 (2002) [4 pages]Standard Radiation Spectrum of Relativistic Electrons: Beyond the Synchrotron ApproximationReceived 26 July 2001; published 8 August 2002 Radiation emitted by an electron in arbitrary, extreme relativistic motion, has been described for the first time in terms of a standard spectrum of nonsynchrotron type. Ultimately, such a nonsynchrotron spectrum is dependant not only on instantaneous trajectory curvature, but also upon its first two time derivatives and helicity, to provide a basic correction to the synchrotron approximation (SA). A strong deviation from SA has been predicted for above GeV electrons in oriented crystals. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.094801
DOI:
10.1103/PhysRevLett.89.094801
PACS:
41.60.–m
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