Trinitite from the first nuclear weapon test in my cloud chamber

Trinitite is radioactive glass created during the first nuclear weapon test, code-named Trinity, on July 16, 1945, at White Sands New Mexico.

It was formed when the heat of the explosion vaporized the desert sand, the steel test tower, and the bomb components. This vaporized mix then rained back down, cooling and fusing into a layer of glass on the desert floor.

The diffusion type cloud chamber I built has a glass dome with felt soaked in alcohol at the top. Below that is a copper plate that is cooled down to -40°F by a peltier cooler and a pc cpu cooler. As the alcohol evaporates it settles at the bottom of the chamber, creating a supersaturated layer of alcohol vapor. It's this layer that the radiation interacts with by ionizing molecules of oxygen and hydrogen in the alcohol as it passes creating the vapor trails.

I have a few pics and videos of the cloud chamber build here: https://imgur.com/a/Lu2WlWG

A gamma ray spectrum taken with a RadiaCode 110 over 65 hours. The trinitite is mildly radioactive at 2.83 cps over background radiation.

Gamma peak at 662 ekV is a decay emission from cesium-137 which does not occur in nature and is one of the byproducts of nuclear fission processes in nuclear reactors and nuclear weapons testing.

The peak at 60 keV is from Americium-241 which is also not found in nature and is produced as a byproduct of nuclear fission processes in nuclear weapons testing.