Observations of the energy-spectrum of the cosmic radiation below ground

✍ Scribed by E.P. George; G.S. Shrikantia

• Publisher: Elsevier Science
• Year: 1956
• Weight: 541 KB
• Volume: 1
• Category: Article
• ISSN: 0029-5582
• DOI: 10.1016/s0029-5582(56)80006-0

✦ Synopsis

In nuclear research emulsions exposed at a depth of 57 rowe the momentum of 400 particles was determined by multiple scattering measurements on long tracks. 317 occurred within 30 ° of the vertical, and for this group the momentum spectrum in the range 0 < p < 40 GeV/c was found to be consistent with a law of the form usually assumedN(p)N (p + p0)-r with P0 ~ 12 GeV]c and F = 3. Particular attention was paid to the momentum interval 0 to 1 GeV/c and no evidence of any anomalies found.

The distribution in angle of the tracks was found to be consistent with a law of the form cos" e with n ~ 2.7 ± 0.2. For those tracks with grain density at least 1.2 times the plateau value (slow tracks) the exponent was found to be 3.7 4-0.25. These values correspond to exponents of the cosmic radiation equal to 1.7 4-0.2 for the fast tracks and 2.7 4-0.25 for the slow.