Is the Electron Radiation Length Constant at High Energies?

Details Is the Electron Radiation Length Constant at High Energies? Is the Electron Radiation Length Constant at High Energies?

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003phrvl..91a4801h&link_type=abstract

Physical Review Letters, vol. 91, Issue 1, id. 014801

Physics

18

Radiation By Moving Charges, X- And Gamma-Ray Sources, Mirrors, Gratings, And Detectors, Calorimeters, Radiation Mechanisms, Polarization

Scientific paper

Experimental results for the radiative energy loss of 149, 207, and 287GeV electrons in a thin Ir target are presented. From the data we conclude that at high energies the radiation length increases in accordance with the Landau-Pomeranchuk-Migdal (LPM) theory and thus electrons become more penetrating the higher the energy. The increase of the radiation length as a result of the LPM effect has a significant impact on the behavior of high-energy electromagnetic showers.

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