Open AccessFurther investigations with a Wilson chamber. II.—The range and velocity of recoil atoms
Author(s) -
P. M. S. Blackett,
D. S. Lees
Publication year - 1932
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1932.0013
Subject(s) - recoil , atomic physics , physics , deflection (physics) , nucleus , alpha particle , range (aeronautics) , collision , nuclear physics , classical mechanics , materials science , computer security , computer science , composite material , biology , microbiology and biotechnology
In a paper by one of us, the method of obtaining the relation between the range and velocity of recoil atoms has been described. In the work described in the following paper the same method has been used to extend the earlier results to greater ranges. Consider a forked track due to an elastic collision between an alpha particle of mass M and initial velocity V and a nucleus of massm , initially at rest. IfΦ and θ denote the angle of deflection of the alpha particle and the angle of projection of the struck nucleus, and ifv a andv n are the velocities of the two particles after the collision, we havem /M = sinΦ /sin (2θ +Φ ), (1)v n /V = 2M/M+m cos θ, (2)v n /v a = M/m sinΦ /sin θ.