Abstract
THE observed radio emission from extensive air showers at frequencies between 30 and 100 MHz is in good agreement with theory1. Both the typical field strength per unit bandwidth, ε ν, and the lateral distribution of the radiation about the shower axis can be given a quantitative interpretation. At lower frequencies the situation is much less satisfactory. Theory predicts that ε ν should rise smoothly from zero at ν=0 towards the observed values at 30 to 100 MHz, but the experimental values between 2 and 5 MHz are about 100 times larger2–5. The calculation presented here is intended to set a generous upper limit to ε ν based on the least controversial elements of the theory. Because the claimed experimental values are greater even than this upper limit, I suggest that further checks are needed.
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Allan, H. R., Jones, J. K., Mandolesi, N., Prah, J. H., and Shutie, P., Conf. on Cosmic Rays, 3, 1097 (Univ. of Hobart, 1971).
Allan, H. R., Clay, R. W., and Jones, J. K., Nature, 224, 253 (1970).
Prescott, J. R., Hough, J. H., and Pidcock, J. K., Acta Physica Hungarica, 29, Suppl. 3, 717 (1970).
Stubbs, T. J., Nature Physical Science, 230, 172 (1971).
Hough, J. H., Prescott, J. R., and Clay, R. W., Nature Physical Science, 232, 14 (1971).
Allan, H. R., Progress in Elementary Particle and Cosmic Ray Physics, 10, 171 (North-Holland, Amsterdam, 1971).
Nikolsky, S. N., Sov. Phys. Uspekhi, 5, 849 (1963).
Fujii, M., and Nishimura, J., Acta Physica Hungarica, 29, Suppl. 3, 709 (1970).
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ALLAN, H. Low Frequency Radio Emission from Extensive Air Showers. Nature 237, 384–385 (1972). https://doi.org/10.1038/237384a0
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DOI: https://doi.org/10.1038/237384a0
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