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Decrease of primaries, showers and ionisation of cosmic rays under layers of lead and iron

✍ Scribed by J. Clay; A. van Gemert; J.T. Wiersma

Publisher
Elsevier Science
Year
1936
Weight
543 KB
Volume
3
Category
Article
ISSN
0031-8914

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✦ Synopsis

The number of showers of Cosmic Rays was measured in lead cylinders under layers of iron and lead up to 700 gr/cm t β€’ The number of showers under iron and lead sheets was also measured.

Under lead and iron were found two maxima which are explained by the two kinds of primaries both of which produce showers. From the place of the maximum and the coefficient of decrease of the hard primaries the coefficient for the decrease of the showers of the primaries was calculated and after that a calculation could be made for the decrease of the soft primaries and their showers. The curves based on these calculations showed a good agreement with the observations. The fact, that the first maximum in the shower curve isnot found under thick layers is here explained by the absence of the soft primaries in this case.

A comparison was made of the decrease of primaries and of showers with that of ionisation under layers of lead and iron between 400 and 700 gr/cm t β€’ From this we see that the decrease is the same and previous results under water are confirmed. The decrease is 0.00042 per gr/cm t β€’

πŸ“œ SIMILAR VOLUMES

Barometric variation of ionisation, prim
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✍ J. Clay πŸ“‚ Article πŸ“… 1936 πŸ› Elsevier Science βš– 125 KB

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Results of the dutch cosmic ray expediti
Results of the dutch cosmic ray expedition 1933 VII. Positive and negative primaries. North-south asymmetry. difference of decrease in lead at different latitudes
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