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Hemispherical distribution of cosmic rays at 25° geomagnetic latitude

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Il Nuovo Cimento (1955-1965)

Summary

A complete investigation has been made of the angular distribution (over various zeniths and azimuths) of the hard component of cosmic rays at the Gulmarg High Altitude Research Observatory (Geomagnetic latitude 24.7° N). The azimuth distribution is found to agree closely with an energy lawE −1.89 dE for all the zenith angles. The zenithal distribution is found to be a cosine power law in which the index «n » varies regularly with azimuth. A sinusoidal dependence of «n » on azimuth has also been obtained by the method of least squares.

Riassunto

Si è eseguita un’analisi completa della distribuzione angolare (su vari zenit ed azimut) della componente dura della radiazione cosmica all’Osservatorio di Alta Quota di Gulmarg (latitudine geomagnetica 24.7° N). La distribuzione azimutale si accorda strettamente, per tutti gli angoli zenitali con una leggeE −1.80 dE. La distribuzione zenitale segue una legge in potenze del coseno in cui l’indice «n » varia regolarmente con l’azimut. Col metodo dei minimi quadrati si è anche ricavata una dipendenza sinusoidale di «n » dall’azimut.

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Gill, P.S., Mitra, A.N. Hemispherical distribution of cosmic rays at 25° geomagnetic latitude. Nuovo Cim 9, 400–411 (1958). https://doi.org/10.1007/BF02725096

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  • DOI: https://doi.org/10.1007/BF02725096

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