AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
Thirty square meters of plastic and nuclear emulsions along with some Cerenkov sensitive material were exposed to cosmic radiation at 120,000 feet in May 1971. The balloon was launched from Holloman AFB, New Mexico vertical cutoff rigidity pc 5.0 BV and remained in the immediate vicinity for 48 hours. During this period, four distinct altitude intervals were distinguished by a sliding plate. Preliminary examination of 13 of the cellulose nitrate layer indicates about 170 nuclei of charge greater than iron will be available for study. Precision measurements will be performed on layers of Daicel cellulose nitrate, Bayer cellulose triacetate and Lexan to determine the charge spectrum of relativistic very heavy cosmic rays. Measurements on the Cerenkov film sensitive to relativistic nuclei with charge greater than 60 and velocity greater than about 0.7 will provide a good check on the velocity and charge of super heavy nuclei. Preliminary scanning data is discussed. Author
Physical sciences research papers,
Prepared in cooperation with the Institut fur Reine und Angewandte Kernphysik, Kiel (Germany), and Franklin Pierce Coll., Rindge, N. H.