Cosmic ray stars in nuclear emulsions at the equator and at high altitude

✍ Scribed by B. Jongejans; F. Schurink; D.J. Holthuizen

• Publisher: Elsevier Science
• Year: 1957
• Weight: 218 KB
• Volume: 23
• Category: Article
• ISSN: 0031-8914
• DOI: 10.1016/s0031-8914(57)91121-7

✦ Synopsis

Results are reported of a nuclear emulsion experiment performed at 4840 meter above sea-level and 0 ° latitude. For uncovered plates a star production of 10,1 4-0.9 stars per cm 3 emulsion per day at a pressure of 560 g cm -°-is found, being a minimum as compared to data at other latitudes.

Within the limits of error, no attenuation is observed for the total star number in 30 cm of lead. For high energy star producing radiation an attenuation length in lead of 550 g cm -2 with a lower limit of 310 g cm -2 resulted. The number of p stars varies approximately as the number of all stars with latitude. The importance of several checks when doing emulsion measurements is stressed.