title: TWO NEW SINGLE-EXPOSURE, MULTI-DETECTOR NEUTRON SPECTROMETERS FOR RADIATION PROTECTION APPLICATIONS IN WORKPLACE MONITORING.
abstract: This communication describes two new instruments, based on multiple active thermal neutron detectors arranged within a single moderator, that permit to unfold the neutron spectrum (from thermal to hundreds of MeV) and to determine the corresponding integral quantities with only one exposure. This makes them especially advantageous for neutron field characterisation and workplace monitoring in neutron-producing facilities. One of the devices has spherical geometry and nearly isotropic response, the other one has cylindrical symmetry and it is only sensitive to neutrons incident along the cylinder axis. In both cases, active detectors have been specifically developed looking for the criteria of miniaturisation, high sensitivity, linear response and good photon rejection. The calculated response matrix has been validated by experimental irradiations in neutron reference fields with a global uncertainty of 3%. The measurements performed in realistic neutron fields permitted to determine the neutron spectra and the integral quantities, in particular H*(10).
authors.affiliation: CIEMAT, Av. Complutense 40, 28040 Madrid, Spain.|IFNF-LNF Laboratori Nazionali di Frascati, via E. Fermi n. 40, 00044 Frascati, Italy.
authors.forename: J M
authors.initials: JM
authors.lastname: Gómez-Ros
authors.affiliation: IFNF-LNF Laboratori Nazionali di Frascati, via E. Fermi n. 40, 00044 Frascati, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Bedogni
authors.affiliation: Politecnico di Milano-Dipartimento di Energia, Via Ponzio 34/3, 20133 Milano, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Bortot
authors.affiliation: UAB, Physics Department, 08193 Bellaterra, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Domingo
authors.affiliation: IFNF-LNF Laboratori Nazionali di Frascati, via E. Fermi n. 40, 00044 Frascati, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Esposito
authors.affiliation: Politecnico di Milano-Dipartimento di Energia, Via Ponzio 34/3, 20133 Milano, Italy.
authors.forename: M V
authors.initials: MV
authors.lastname: Introini
authors.affiliation: Politecnico di Milano-Dipartimento di Energia, Via Ponzio 34/3, 20133 Milano, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Lorenzoli
authors.affiliation: IFNF-LNF Laboratori Nazionali di Frascati, via E. Fermi n. 40, 00044 Frascati, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Mazzitelli
authors.affiliation: CIEMAT, Av. Complutense 40, 28040 Madrid, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Moraleda
authors.affiliation: Politecnico di Milano-Dipartimento di Energia, Via Ponzio 34/3, 20133 Milano, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Pola
authors.affiliation: IFNF-LNF Laboratori Nazionali di Frascati, via E. Fermi n. 40, 00044 Frascati, Italy.|INAIL-DIT, Via di Fontana Candida 1, 00040 Monteporzio Catone, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Sacco
mesh_terms: D004867:Equipment Design; D006801:Humans; D009502:Neutrons; D017785:Photons; D011829:Radiation Dosage; D011834:Radiation Monitoring; D011835:Radiation Protection; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D017132:Workplace