Chap. 4] 



PROTONS, DEUTERONS, AND ALPHA PARTICLES 



105 



Table 17. Range of Protons in Aluminum 



Range data for energies 0.117 to 1.842 mev reported by D. B. Parkinson, R. G. Herb, J. C. Bellamy, 

 and C. M. Hudson, Phys. Rev., 52, 75 (1937). Range is given in centimeters and distinguished by an 

 asterisk *. Range data for energies from 1 to 13 mev are taken from M. S. Livingston, and H. Bethe, 

 Rev. Mod. Phys., 9, 263 (1937). Data for energies 13 to 10,000 mev are calculated from Bethe theory by 

 J. H. Smith, Phys. Rev., 71, 32 (1947). Bethe correction Ck is included, but Fermi effect is not taken 

 into account. Average excitation potential, / = 150 ev. 



