96
WORLDWIDE EFFECTS OF ATOMIC WEAPONS
1950, p. 175,
2, Lastett, J. JACKSON, ef a/., "First-forbidd
en Beta-spectra and the Beta-spectrum of $r?°
and Y9°," Phys, Rev., Vol. 79, 1950, p. 412.
3.
NBS Circular 499,
>
REFERENCES
1. Powers, R. I, AND A. E. VoIcT, “The Half
Life of Strontium 90,” Phys. Rev., Vol. 79,