Gamma Spectrometry Forum

A radiation source almost everywhere aviable is Radon-222 and its decay products. Rn and the decay products can be collected in different ways: If air is moved through an activated carbon filter, radon is adsorbed on the surface of the carbon. After a few hours, the decay chain is established and th...

Hello, K-40 has three independent kinds of decay: beta- (for K 28.2 decays per gram and s, for KCl 14.8 decays per gram and s) electron capture (gamma) (for K 3.33 decays per gram and s, for KCl 1.75 decays per gram and s) beta+ decay is very rare (10 decays from a million) and can not be seen with ...

Steven,

maybe the 5keV are not correct, but the peak at the left will only be there with the marker inside the shield. This is why I made a background spectrum with same settings. I set the left treshold to a value excluding the noise.

Hans-Jörg

Hello Some years ago I bought a trigalight marker. With a reflector made from an alu sheet, I used it as a very faint torch. When completely dark, one can see things in a distance of about ten centimeter. This marker contains a tiny glass tube filled with tritium and coated in the inner side with a ...

Hello A short time ago I found that lanthanum is used in NiMH batteries. As lanthanum contains a small amount (about 0.09 %) of an instable isotope (La-138) with a half-life of 1011 years, I tried to detect it in the batteries. It is similar to potassium-40, where the half-life is shorter (1.3*109 y...

Hello, my name is Hans-Jörg Wildanger, I am 62 years old and I am living in Germany near Saarbrücken. Since my early days, I have been interested in science, especially chemistry and electronics. Some years ago, as parts became cheaper and more available, I started with radiation measuring with Geig...