nay gamma and neutron field of thé bomb was expected to permit determination of the effect of the gamma-ray and neutron bombardment on the optical opacity of the air. The preceeding experiments provided a series of good qualitative data with evidence of formation of ultraviolet absorbing substances, their absorption coefficients gradually decreasing towards the longer wavelengths and becoming rather weak in the red part of the ann adem a oo ee ey wert oe te a [DELETED -“ . ~ 131 - ie COPIED/DOE LANL RC 2 ye

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