Gamma Spectrometry Forum

Small shielded boxes are a not pratical for bigger samples or for placing samples at some distance from the sensor.

I decided to build a big box.
the outer box is wood box, inner lenght 60 cm.



the inner box is a plexiglass box, lenght 50 cm, covered with copper





detail, plexiglass 2mm, copper 0,5 mm



placing the inner box inside de outer box

between the lead plates and copper his a sheet of 1 mm pure tin



after de sample is put inside a lid of plexiglas (2mm) , copper plate (0,5mm) is put on top



after that a pure tin plate (1 mm)



after that lead sheets


The objetive of this setup is that is eaily upgradable, if I want to add more copper it's easy, if I want to add more tin, it's easy, if I want to add more lead it's easy, lead can even be added outside the wood box, but for that I have to place the whole setup somewhere that it will not be moved, becuase it's a heavy setup.

looking foword for your comments, and sugestions.

Paulo,

Thanks for sharing, yes its a good idea to have a larger shield if you have the space, with more space around the detector and the lead you get less XRF reflecting back onto the detector. You can start with a small amount of lead and add more if you need it.

Steven