The two known radioactive isotopes of Beryllium (BeT and Be lo) are produced in the atmosphere in nuclear disintegrations initiated by cosmic radiation. The long lived B~ 10 (hal/lite 2.7 million years) is di/~cult to detect and has not yet been isolated. The short lived isotope Be T (halt life 53 d
Radioactive Sulphur produced by Cosmic Rays in Rain Water
โ Scribed by GOEL, P. S.
- Book ID
- 109590057
- Publisher
- Nature Publishing Group
- Year
- 1956
- Tongue
- English
- Weight
- 211 KB
- Volume
- 178
- Category
- Article
- ISSN
- 0028-0836
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๐ SIMILAR VOLUMES
By using an ionisation instrument which records every one or two minutes it is possible to follow the variation of intensity of a radiation. We found that variations of gamma radiation were followed without any delay. On the contrary the variation of the intensity of cosmic radiation, by changing th
Clay and Van Tijn state that the "time of decay" is 8.6 minutes. terpret this to be the value of the half-life.
A counter is surrounded by lead and the variation is observed directly after covering it with a layer of 20 cm Pb. The experiment was repeated 10 times and the time for 3 ร 100 shocks recorded. The theoretical deviation to be expected is 1,8~/o, the experimental mean deviation was 1,05~o. After cove