Abstract
RADIO pulses from extensive air showers have previously been observed at a number of frequencies below 100 MHz (refs. 1–7), and at 520 MHz (ref. 8) by the Dublin group. The present theories9,10, however, predict that very little emission will occur at frequencies greater than about 100 MHz, and it is therefore of considerable interest to find the spectrum of emission at high frequencies. The experiments reported here confirm and extend the results of the Dublin group.
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References
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SPENCER, R. Radio Pulses from Cosmic Ray Air Showers at 44, 105, 239 and 408 MHz. Nature 222, 460–461 (1969). https://doi.org/10.1038/222460a0
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DOI: https://doi.org/10.1038/222460a0
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