![]() I thought I had banished everything to a faraway location in the house but for some unknown reason there is a bag of brand-new hands of mixed type some of them are blue steel gold color and some have that familiar green colored stuff in the hands. Turning it on in the room and the lowest sensitivity every now and then it makes a little chirping sound far enough apart that you wonder if it's broken and then reminded by a little chirping sound. Has three separate ranges labeled 0.5, 5 an 50 mR/hr. it has a small end window type tube zero idea how well it's calibrated. The Geiger counter I have was purchased as a partial kit from a company called maplin the reason for the partial kit I already had the Geiger counter tube. Someday when the plague goes away and life somewhat returns to normal maybe you could find somebody locally that has radium hands you can check out your detector. If you want to learn a little about the history of cloud chambers (and their connection to Scotland's highest mountain), there is a good introduction on Wikipedia -> ĮDIT: I wonder if I can re-purpose all of the alcohol based hand sanitizer that will be hopefully be in the bargain bins this winter as a cloud source media(*). I'll need to do some google trawling to see if I can find an easy to replicate design. I have a couple of peltier coolers which I *may* be able to used for this purpose. They are fascinating to sit and watch, but most of the ones I've seen over the years required liquid nitrogen (or perhaps dry ice) to cool the chamber. It entirely failed to materialise last winter, so perhaps this winter. On my winter projects list is a cloud chamber. A very well presented demo of a cloud chamber. They don't detect the alpha however, but you can estimate the alpha from the amount of gamma and beta they detect, so I suspect your device should work the same Thanks. I have a couple of devices that detect emissions from old watch dials, (radium and later tritium dials). Secondly, and for the same reason, making a detector that is sensitive to alpha radiation is more problematic, since whatever you make it from, must allow alpha particles to enter the detector, while protecting the detector from the environment. Most commercial radiation detectors fall in to the category of beta and gamma or gamma only detectors, for a couple of reasons.įirst, alpha radiation is fairly easy to protect against, and most of it will be blocked by clothing or a thin barrier of paper, and therefore is far less of a problem than beta and gamma radiation. Mainly they detect beta and gamma radiation, which means they will detect something from the radium hands, just not the majority of the radiation which is Alpha. There is a full discussion of the issue here.Īs to uses for radiation detectors like yours, they are quite interesting devices to play with. ![]() They are also easily absorbed by pretty much anything, so they provide limited scope for damage to tissue, unless of course as Nucejoe says unless you add the radium to your lunch, you are probably fairly safe. Alpha particles are in essence Helium, or if you want to be more specific a Helium 4 nucleus.
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