Skip to main content
Log in

Sulla variazione con la quota della frequenza delle evaporazioni nucleari nelle lastre fotografiche

  • Published:
Il Nuovo Cimento (1943-1954)

Riassunto

Si confrontano i risultati dell'esplorazione di 3 lastre Ilford inviate a una quota di 17 km mediante un pallone sonda e di 2 lastre analoghe esposte per 43 giorni a quota 3500 (Laboratorio della Testa Grigia). Nell'ipotesi di un assorbimento esponenziale della radiazione responsabile di questi fenomeni, se ne deduce un cammino libero medio λ=141±12 g/cm2.

Summary

A comparison is made between the experimental results obtained examining 3 Ilford plates sent at 17 km a.s.l. in the atmosphere with flying balloons, and 2 similar plates exposed for 43 days at 3500 m a.s.l. (Laboratorio Testa Grigia).

Assuming an exponential absorption of the radiation responsible for the observed phenomena, the deduced mean free path is λ=141±12 g/cm2.

Using the Gross transformation, we got λ=176±14 g/cm2.

In both cases the error, calculated taking into account the statistical fluctuations only, is likely lower than the real one. However, a good value for the mean free path seems to stay between 130 and 180 g/cm2.

A discussion is made comparing our results with those deduced from other Authors' works by the same or by different techniques.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

References

  1. C. M. G. Lattes, G. P. S. Occhialini eC. F. Powell:Nature,159, 186 (1947);159, 694 (1947);160, 453 (1947);160, 486 (1947).

    Article  ADS  Google Scholar 

  2. C. F. Powell eG. P. S. Occhialini:Nuclear Physics in Photographs, Oxford, Clarendon Press, 1947.

    Google Scholar 

  3. H. Wambacher:Sitz. Akad. Wiss., Wien, IIA,149, 157 (1940).

    Google Scholar 

  4. H. Bridge eB. Rossi:Phys. Rev.,71, 379 (1947);H. Bridge, B. Rossi eR. Williams:Phys. Rev.,72, 257 (1947);A. E. Tatel eJ. A. Van Allen:Phys. Rev.,73, 87 (1948).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Cortini, G., Manfredini, A. & Persano, A. Sulla variazione con la quota della frequenza delle evaporazioni nucleari nelle lastre fotografiche. Nuovo Cim 5, 292–297 (1948). https://doi.org/10.1007/BF02784463

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02784463

Navigation