The Budapest Research Reactor’s Prompt Gamma Activation Analysis (PGAA) and Neutron-Induced Prompt gamma Spectroscopy (NIPS)
facilities were significantly upgraded during the last few years. The higher neutron flux, achieved by the partial replacement
and realignment of the neutron guides, made feasible the automation and specialization of the two experimental stations. A
new neutron flux monitor, computer-controlled beam shutters and a low-level counting chamber have been put into operation
to assist with in-beam activation experiments. An automatic sample changer has been installed at the PGAA station, while the
NIPS station was redesigned and upgraded with a Compton suppressor to use for the non-destructive analysis of bulky samples.
In the near future the latter setup will be completed with a neutron tomograph and a moving table, to turn it into a Neutron
Radiography/Tomography-driven PGAA equipment.
The prompt -activation analysis (PGAA) facility at Budapest Research Reactor offers a unique possibility to perform in-beam measurements. Several k0 factors for decay -lines of short-lived nuclides have been determined accurately by means of in-beam activation. The present values compare well with literature data. New k0 factors are proposed for 24mNa and 60mCo.
The off-line γ-counting of in-beam activated radionuclides has been explored to extend the detection capabilities of prompt
gamma activation analysis (PGAA). Such combination of the prompt measurement with a subsequent decay-counting is feasible
if radionuclides with half-lives of minutes or hours are produced in the sample during neutron irradiation. Thanks to the
simpler spectrum and the higher counting efficiency of decay counting, both selectivity and sensitivity can be improved. The
pros and cons of the proposed method have been demonstrated on a series of industry-related measurements.