k = (400 particles / ((m exponent 2) second sterad)) for helium
k = (20 particles / ((m exponent 2) second sterad)) for [C, N, O, ?]
k = (8 particles / ((m exponent 2) second sterad)) for (Z >= 10)
Proton spectrum (Winckler has all heavier)
N(epsilon) = (((4000)/((1 + epsilon) exponent 1.07)) particles / ((m exponent 2) second sterad)).
True exponent may be higher and numerator slightly lower.
In any case it seems that the velocity spectrum of all particles of charge (Z > 1) is independent of the mass of the particle and that the chemical composition of that part of the beam stays constant for energies between 0.35 < epsilon ~< 10 Bev / nucleon.
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mean free path:
For [glass?] and brass, the experimental M.F.P. are appreciably longer than geometrical ([D?]R=0) and are given by
sigma = (pi) (((R sub 1 {target}) + (R sub 2 {projectile}) - (2(delta)R)) exponent 2)
R = (1.45 x (10 exponent -13)) (A exponent (1/3)) cm.
((delta)(R)) = ((1.0 x (10 exponent -3)) cm).

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k = (400 particles / ((m exponent 2) second sterad)) for helium
k = (20 particles / ((m exponent 2) second sterad)) for [C, N, O, ?]
k = (8 particles / ((m exponent 2) second sterad)) for (Z >= 10)
Proton spectrum (Winckler has all heavier)
N(epsilon) = (((4000)/((1 + epsilon) exponent 1.07)) particles / ((m exponent 2) second sterad)).
True exponent may be higher and numerator slightly lower.
In any case it seems that the velocity spectrum of all particles of charge (Z > 1) is independent of the mass of the particle and that the chemical composition of that part of the beam stays constant for energies between 0.35 < epsilon ~< 10 Bev / nucleon.
-----------------------------------------------------------------------------------------
mean free path:
For [glass?] and brass, the experimental M.F.P. are appreciably longer than geometrical ([D?]R=0) and are given by
sigma = (pi) (((R sub 1 {target}) + (R sub 2 {projectile}) - (2(delta)R)) exponent 2)
R = (1.45 x (10 exponent -13)) (A exponent (1/3)) cm.
((delta)(R)) = ((1.0 x (10 exponent -3)) cm).