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James Van Allen journal, 1951?-December 1954
Page 6
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A determination of the absolute intensity of the Li gamma radiation. H. Wäffler and O. Hirzel "Helvetica Physica Acta" 21, page 200 (1948). -------------------------------------------------------------- C. Franzinetti (Bristol) and S. Rosenblum (Paris) Spectrum of light particles at 12,000 feet Photographic emulsions (two) 29,000 gauss 8 [num. Air gap?] [c.f.?] 150 particles, pass through one emulsion stop in second (a) 12 % Masses 170-240 electron [was?] (If Z [>? =?] 1). Negative ones no visible interaction with matter but 20% show decay electrons (b) 9.8% mass 250-350 [cm?] All pos. show pi - μ decay : 80% of neg produce disintegrations (c) 53% 1400-2300 [rm? cm?] and have appearance of protons.
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A determination of the absolute intensity of the Li gamma radiation. H. Wäffler and O. Hirzel "Helvetica Physica Acta" 21, page 200 (1948). -------------------------------------------------------------- C. Franzinetti (Bristol) and S. Rosenblum (Paris) Spectrum of light particles at 12,000 feet Photographic emulsions (two) 29,000 gauss 8 [num. Air gap?] [c.f.?] 150 particles, pass through one emulsion stop in second (a) 12 % Masses 170-240 electron [was?] (If Z [>? =?] 1). Negative ones no visible interaction with matter but 20% show decay electrons (b) 9.8% mass 250-350 [cm?] All pos. show pi - μ decay : 80% of neg produce disintegrations (c) 53% 1400-2300 [rm? cm?] and have appearance of protons.
Van Allen Papers
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