In-beam neutron activation analysis of stainless steel and iron ore

Non-destructive analysis of metals and alloys using prompt gamma activation analysis and complementary methods

“…A modern alloy, a Co-Re-Cr superalloy used for manufacturing durable and heat-resistant gas turbines [14] contains Co to improve its heat and wear resistance. While irradiating the sample with neutrons, a long-lived radioactive cobalt isotope is produced: from 59 Co -the only stable Co isotope -60m Co (T1/2 = 10.5 minutes) and 60 Co (T1/2 = 5.27 years) are produced. The latter has a long half-life and its high production yield may hinder the subsequent work with the irradiated specimen outside the laboratory, if activated beyond the legal clearance level [15] (487/2015.…”

“…The scintillator detectors were gradually replaced the from the end of the 1960's with semi-conductor detectors combined with Compton suppression systems, in order to reduce the spectral background [59]. The first PGAA measurements on iron ore, stainless steel and gold-alloy samples were carried out already in the 1970s [60], [61]. The real boost in the development of PGAA technique was the appearance of the neutron guides [62].…”