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James A. Van Allen journal, December 1954-October 1955
Page 110
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Therefore, Minimum value of s = ((26)/((2.17)(2.54)(3.667))) = 1.29 Mev/(g/cm squared) in NaI. [sketch/picture of ray passing through crystal] Cosmic Rays passing normally throughout crystals should therefore give an expected value of (1.29)(0.58) = 0.75 Mev (Cf. : (Cs exponent 137) - 0.669 Mev.) Number of Cosmic Rays through crystal at high latitude above the atmosphere ~ (0.50)(π)(1.82) - 2.9 / second. Number of calibrating 30 - alpha ~1 / second Number of "Auroral" particles ~ 50 / second (Might be much greater with thin window) ?
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Therefore, Minimum value of s = ((26)/((2.17)(2.54)(3.667))) = 1.29 Mev/(g/cm squared) in NaI. [sketch/picture of ray passing through crystal] Cosmic Rays passing normally throughout crystals should therefore give an expected value of (1.29)(0.58) = 0.75 Mev (Cf. : (Cs exponent 137) - 0.669 Mev.) Number of Cosmic Rays through crystal at high latitude above the atmosphere ~ (0.50)(π)(1.82) - 2.9 / second. Number of calibrating 30 - alpha ~1 / second Number of "Auroral" particles ~ 50 / second (Might be much greater with thin window) ?
Van Allen Papers
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