1.Previous
3.Next

a collimator has been added (blue bars). This may be a sheet of lead or other material opaque to the incoming radiation with many tiny holes bored through it or in the case of neutrons it can be a sandwich arrangement (which can be up to several feet long; see ENGIN-X) with many layers alternating between neutron absorbing material (e.g., gadolinium) with neutron transmitting material. This can be something simple, such as air; alternatively, if mechanical strength is needed,

1.Previous
3.Next