Detectors based on semiconductors , notably hyperpure germanium , have better intrinsic energy resolution than scintillators , and are preferred where feasible for gamma-ray spectrometry . In the case of neutron detectors , high efficiency is gained through the use of scintillating materials rich in hydrogen that scatter neutrons efficiently . Liquid scintillation counters are an efficient and practical means of quantifying beta radiation Some reactor accidents have left extremely high levels , such as at Chernobyl or the Idaho SL-1 . In the case of Chernobyl , many brave rescue and mitigation workers , some knowingly and some not , doomed themselves . The very careful cleanup of the SL-1 , in a remote area and where the containment retained its integrity , minimized hazards
SL-1
SL-1
Nuclear MASINT