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Beta-particle energy distributions of the radionuclides in medicine are calculated for the medical physics applications. The radial component solutions of Dirac wave equations are evaluated for a point-nucleus un screened Coulomb potential. The WKB method is employed to correct the screening due to the orbital-electron cloud. Fierz interference terms are ignored. The radionuclides considered are /sup 32/P, /sup 90/Y, /sup 131/I, /sup 166/Ho, /sup 192/Ir, /sup 198/Au, /sup 153/Sm, /sup 169/Er and /sup 188/Re. A total of 9 beta-spectra for the radionuclides, currently in domestic use or potential use in the near future, are calculated with enough accuracy and presented in graphs and tables.
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