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James Van Allen journal, 1951?-December 1954
Page 87
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of the alpha particle in [lab?] system in units of the proton mass is (E sub 0) = ((((E sub 0) exponent 1)(E)) + (((square root of ((((E sub 0) exponent 1) exponent 2) - 1))(square root of ((E exponent 2) - 1)))(cosign [I? J?]))) For ((E sub 0) exponent 1) < 1.008 ([(? |?] ([E sub 1? E sub 0?] - E [)? |?])/E <= 13% Therefore more or less monoenergetic beam of alpha's in lab system. Used multiple coulomb scattering [gamma?] G. Occhialini, Nuovo Cimento, Supplement 3, page 413 (1949) Y. Goldschmidt-[Clermont? Clarmont?] Nuovo Cimento 7, 1 (1950) to get alpha energies. Extended scattering technique (relative scattering among the various alpha's of the beam) to range 1 to 100 Bev / nucleon -------------------------------------------------------------------- Energy of heavy nuclei below 1 Bev / nucleon determined by range measurements. At Minnesota (lambda=55 degrees) geomagnetic cut-off 0.3 to 0.35 Bev / nucleon
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of the alpha particle in [lab?] system in units of the proton mass is (E sub 0) = ((((E sub 0) exponent 1)(E)) + (((square root of ((((E sub 0) exponent 1) exponent 2) - 1))(square root of ((E exponent 2) - 1)))(cosign [I? J?]))) For ((E sub 0) exponent 1) < 1.008 ([(? |?] ([E sub 1? E sub 0?] - E [)? |?])/E <= 13% Therefore more or less monoenergetic beam of alpha's in lab system. Used multiple coulomb scattering [gamma?] G. Occhialini, Nuovo Cimento, Supplement 3, page 413 (1949) Y. Goldschmidt-[Clermont? Clarmont?] Nuovo Cimento 7, 1 (1950) to get alpha energies. Extended scattering technique (relative scattering among the various alpha's of the beam) to range 1 to 100 Bev / nucleon -------------------------------------------------------------------- Energy of heavy nuclei below 1 Bev / nucleon determined by range measurements. At Minnesota (lambda=55 degrees) geomagnetic cut-off 0.3 to 0.35 Bev / nucleon
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