Ionisation by cosmic and radioactive radiation at different gas pressures. The influence of the wall of the vessel. Disintegration of heavy atoms by cosmic rays
✍ Scribed by J. Clay
- Publisher
- Elsevier Science
- Year
- 1935
- Weight
- 636 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0031-8914
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✦ Synopsis
The ionisation of argon due to cosmic and radioactive rays was investigated up to a pressure of 100 a{m The ionisation d u e to particles originating in the gas under the action of the incident radiation was separated from the portion which is due to particles emitted by the wall.
By the incident radiation is meant t h a t which is actually incident in the apparatus, which in the case of cosmic rays includes therefore airsecundaries etc.
As far as the ionisation is coming from the gas, it is proportional to the density of the gas up to 100 arm. F r o m the iron wall there come particles with a range of 1 cM in 78 a t m of argon. The energy must be about 250000 e Volts, specific ionisation 110 ions per cm.
The n u m b e r of particles from the lower wall and t h e upper wall are equal for cosmic rays, which shows t h a t there must be an intermediate radiation of photon character.
The result of radioactive radiation is similar. Lead and gold wall gave another picture. Here are besides the electron particles other particles of high specific ionisation of about 50 million eVolts.
• 1) J. C l a y and P .