PURPOSE: This rule lists relative biological effectiveness values which are referred to in other rules of 19 CSR 20-10.

1. (1) The relative biological effectiveness

2. (RBE) values in Table I are convenient approximations to relate dose in rads to dose in rems. The value will vary greatly with the biological effect being considered, the acuteness of the exposure and many other factors. The qualified expert should evaluate these factors for each situation and should adjust the values accordingly.

   Table I—RBE Values

   Radiation RBE

X-rays and gamma rays of all energies and electrons and beta rays above 0.03 Million electron Volts (MEV) 1.0 Fast neutrons and protons up to 10 MeV 10 Alpha particles 10 Heavy recoil nuclei 20

AUTHORITY: section 192.420, RSMo 1986.* This rule was previously filed as 13 CSR 50- 90.110. Original rule filed Nov. 9, 1964, effective Dec. 9, 1964.

*Original authority: 192.420, RSMo 1963.