UHF Radio Pulses associated with Extensive Air Showers at Large Zenith Angles

Abstract

FOLLOWING the initial observation of UHF radio pulses associated with extensive air showers at large zenith angles1, several experiments have been successful in detecting such pulses from the zenith2–5. These experiments indicate that the energy spectrum of the radio pulses falls with increasing frequency between 30 and 550 MHz, and that the shower threshold for detecting UHF pulses is > 2 × 1015 eV for showers incident from the zenith. Below 100 MHz the radio pulses arise by a coherent emission mechanism, but above this frequency the question of coherent or incoherent emission remains open.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    Fegan, D. J., and Slevin, P. J., Nature, 217, 440 (1968).

    ADS  Article  Google Scholar 

  2. 2

    Spencer, R. E., Nature, 222, 460 (1969).

    ADS  Article  Google Scholar 

  3. 3

    Fegan, D. J., and Jennings, D. M., Nature, 223, 723 (1969).

    ADS  Article  Google Scholar 

  4. 4

    Galli, M., Palumbo, G. G. C., and Sinigaglia, G., Proc. Eleventh IUPAP Conf., Budapest (1969).

  5. 5

    Charman, W. N., and Jelley, J. V., Nuovo Cimento, B2 (1969).

Download references

Author information

Affiliations

Authors

Rights and permissions

Reprints and Permissions

About this article

Cite this article

FEGAN, D. UHF Radio Pulses associated with Extensive Air Showers at Large Zenith Angles. Nature 227, 156–157 (1970). https://doi.org/10.1038/227156b0

Download citation

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.