Astronaut Scientific Debriefings, 1962-1963

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LOS ALAMOS SCIENTIFIC LABORATORY
UNIVll:R■ ITY 01" CALll"ORNIA
L.09 ALAMC>e, NllW Mll:XICO
tO: Dr. Jocelyn Gill
July 13, 1962
NitroGen peroxide haa been extensive~ studied and two papers were fou.nd
'
'
which gave absorption coefficients in the visible region of the spectrum. Wiley
and Foord (Proceedings of the Royal Society Al35, 174 (1932) give a coefficient
which I convert to
-l.9
2/
er ~l - 3 x 10
cm molecule
depending on the wavelengths selected by their filters (the lower value was for
the range 4900 < ). < 525·0 A) •
Hall and Blacet (J. Chem. Phys. 20, 1745 (1952) give a curve obtained with
'
.
a Cary spectrophotometer having ~ 5 A resolution.
Maxinrum absorption occurs in
the range 3500 < ). < 4500 A and drops to ~1/2 the peak value at 5000 A. They
give no data for longer wavelengths. I convert their absorption coefficients to
~6 x 10-ia cm2 /molecu.le at 4000 A, and~ 3 x 10-ia cm2 /molecule at 5000 A.
Structure produces changes in cross section of~ 2 x 10-ia cm2 /molecule at wave­
lengths separated by a· few angstroms.
Ta.king an 'average value of 4 x10-ia cm2 /molecule 1 ·we find
• and using X3 • 5.4 x 107 cm
Po• (1.4 ± 1) x 1011 molecules/cm3
. •.