Accession Number : AD0663243

Title :   CERENKOV RADIATION ASSOCIATED WITH EXTENSIVE AIR SHOWERS.

Descriptive Note : Technical note,

Corporate Author : TECHNION - ISRAEL INST OF TECH HAIFA DEPT OF PHYSICS

Personal Author(s) : Kasha,Henry ; Oren,Yona ; Sitte,Kurt

Report Date : 01 SEP 1961

Pagination or Media Count : 11

Abstract : The Cerenkov light flashes accompanying the passage of extensive air showers (EAS) through the atmosphere were studied at 200 m above sea level by means of telescopes with 4.9 deg. half-opening angle, used in conjunction with an eight-tray hodoscope. Preliminary results show that the spectrum of events accompanied by a light signal is flatter than that of all showers in the range of approx. 100,000 to 5,000,000 particles. The light intensity per shower electron is found to decrease with increasing shower size, while the fluctuations in this quantity increases with the size. The lateral light distribution between 5 and 80 m, rather flat for showers of < 200,000 particles, increases steeply with increasing shower size. It was possible to obtain information on the angular distribution of the Cerenkov light in EAS with respect to the shower axis as viewed from a given distance from the center of the shower. It was found that the light intensity falls off by half at 10 deg. (Author)

Descriptors :   (*COSMIC RAYS, *CERENKOV RADIATION), COSMIC RAY TELESCOPES, COSMIC RAYS, DISTRIBUTION, SECONDARY EMISSION, ELECTRONS, LIGHT, INTENSITY, ISRAEL

Subject Categories : Atmospheric Physics
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE