nope...
GM tubes
The usual form of GM tube is an end-window tube. This type is so-named because the tube has a window at one end through which ionizing radiation can easily penetrate. The other end normally has the electrical connectors. There are two types of end-window tubes: the glass-mantle type and the mica window type. The glass window type will not detect alpha radiation since it is unable to penetrate the glass, but is usually cheaper and will usually detect beta radiation and X-rays. The mica window type will detect alpha radiation but is more fragile.
Invention of halogen tubes
The halogen GM tubes were invented by Sidney H. Liebson in 1947,[3] and are now the most common form, since the discharge mechanism takes advantage of the metastable state of the inert gas atom to ionize the halogen molecule and produces a more efficient discharge, which permits it to operate at much lower voltages, typically 400–600 volts instead of 900–1200 volts. It also has a longer life because the halogen ions can recombine whilst the organic vapor cannot and is gradually destroyed by the discharge process (giving the latter a life of around 108 events).
es una especie de amplificacion usando las propiedades de los gases.
If a particle has enough energy to ionize a gas atom or molecule, the resulting electrons and ions cause a current flow which can be measured in different ways
quizas se podria hacer de otras formas no se , a ver si me da la vena y lo pienso ....en internec no hay nada que no sea con tubos geiger rusos..
con una bombilla halogena tal vez ? a 500 voltios la explotas ...tal vez reforzandola previamente con epoxy ..!?