Tag Archives: bi214

Radioactive Rain Water

Filed under Radiation, Science
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Below are my findings…

I came home today to find the very first drizzle of rain! I tested the rain and found that it appeared to be radioactive. My 32 new bars of lead were still drying from their ploy-coat, so I was down to my reserve 13 bars, barely enough for a clean scan, and I was totally unready.

My etiquette, scientifically speaking, was quite blown. Better luck next time I suppose.

Regardless, I got some good data and good readings as well. My instrument, a UCS30 gamma spectrometer uses a 38mm NaI(Tl) Scintillator, type 6S6P1.5VDC2, and is quite effective at detecting radiation. I fired it up and took a look into the paper towel swipe I had made.

My SE International Inspector EXP+ detected about 150-180 CPM from the water on the paper. My background for that unit, in that room, is about 38 CPM. These checks were “spot checks” and not accumulations averaged by time, which accounts for the variance.

NOTES and CAUTIONS:

(1)I am not an expert nor am I a professional scientist. I am a computer scientist.
(2)I make no claims as to the suppositions I make concerning the isotopes “found”.
(3)The levels found are quite small. None of these levels are very high.

The following energy photopeaks were found, given a full 1 hour test of the paper:

Peak Centroid
81.39 KeV [Normal Backscatter]

248.72 KeV – 243.941 KeV

306.17 KeV – 304.380 KeV

364.64 KeV – 362.302 KeV

618.65 KeV – 614.529 KeV

The peak is the highest point and the Centroid is the more accurate center of the photopeak, thanks to calculus.

Here is the link to the Data Report: http://anti-proton.com/dat/rain112111.pdf