| dc.creator | Vagena E., Theodorou K., Stoulos S. | en |
| dc.date.accessioned | 2023-01-31T10:23:59Z | |
| dc.date.available | 2023-01-31T10:23:59Z | |
| dc.date.issued | 2018 | |
| dc.identifier | 10.1016/j.nima.2018.01.025 | |
| dc.identifier.issn | 01689002 | |
| dc.identifier.uri | http://hdl.handle.net/11615/80323 | |
| dc.description.abstract | Neutron activation technique has been applied using a proposed set of twelve thick metal foils (Au, As, Cd, In, Ir, Er, Mn, Ni, Se, Sm, W, Zn) for off-site measurements to obtain the neutron spectrum over a wide energy range (from thermal up to a few MeV) in intense neutron-gamma mixed fields such as around medical Linacs. The unfolding procedure takes into account the activation rates measured using thirteen (n,γ) and two (n,p) reactions without imposing a guess solution-spectrum. The MINUIT minimization routine unfolds a neutron spectrum that is dominated by fast neutrons (70%) peaking at 0.3 MeV, while the thermal peak corresponds to the 15% of the total neutron fluence equal to the epithermal-resonances area. The comparison of the unfolded neutron spectrum against the simulated one with the GEANT4 Monte-Carlo code shows a reasonable agreement within the measurement uncertainties. Therefore, the proposed set of activation thick-foils could be a useful tool in order to determine low flux neutrons spectrum in intense mixed field. © 2018 Elsevier B.V. | en |
| dc.language.iso | en | en |
| dc.source | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | en |
| dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85041394177&doi=10.1016%2fj.nima.2018.01.025&partnerID=40&md5=b5a0c7267dd723c135b334c8aa18b0a4 | |
| dc.subject | Cadmium | en |
| dc.subject | Chemical activation | en |
| dc.subject | Erbium | en |
| dc.subject | Iridium | en |
| dc.subject | Linear accelerators | en |
| dc.subject | Manganese | en |
| dc.subject | Neutron spectrometers | en |
| dc.subject | Samarium | en |
| dc.subject | Tungsten | en |
| dc.subject | Uncertainty analysis | en |
| dc.subject | Activation foil | en |
| dc.subject | GEANT simulation | en |
| dc.subject | LINAC | en |
| dc.subject | MINUIT routine | en |
| dc.subject | Neutron spectra | en |
| dc.subject | Neutrons | en |
| dc.subject | Elsevier B.V. | en |
| dc.title | Thick-foils activation technique for neutron spectrum unfolding with the MINUIT routine—Comparison with GEANT4 simulations | en |
| dc.type | journalArticle | en |
