T \b., B+2.3x10° T T | ! T T T \ \ \ © ISOLATED PARTICLES a \ s} cenrmrucron/sie FRACTIONS e \ © NAGASAKI S. + SPECIFIC BETA ACTIVITY (ARBITRARY UNITS) \ 10'+~ ioe 10% t Figure 3. L | io"! 1 f. | 10° DIAMETER (jm) Ll i [ey Specific Beta Activity of Particles from a Second Low-Yield Airburst. 571 L