396 



TABLE 606. 

 RADIOACTIVITY. 



P = 1/2 period = time when body is one half transformed. A = transformation constant (see previous page). 

 The initial velocity of the a particle is deduced from the formula of Geiger V 3 = aR, where R = range and assuming 

 the velocity for RaC of range 7.06 cm. at 20 is 2.06 X io cm per sec., i.e., v = 1.077^. 



See The Constants of Radioactivity, Wendt, Phys. Rev. 7, p. 389, 1916. 

 SMITHSONIAN TABLES. 



