Neutron spectrometry around a high-energy electron-positron collider using a multi-sphere system with passive detectors.
At the INFN LNF (Frascati), the 510 MeV electron-positron collider DAPhiNE is operating since 1997. The neutron fields in the areas around the accelerator were characterised using a Bonner sphere system. The sensitivity of the system was extended up to 10(2) MeV by means of a lead loaded 12('') sphere. Recently developed thermoluminescence dosemeters (TLDs), with improved neutron sensitivity and gamma rejection properties, were used as central detectors. The new TLD-based spectrometric system was characterised by irradiation in quasi-monoenergetic or radionuclide neutron fields. In addition, numerical verifications with the Monte Carlo code MCNP were performed. This work addresses this new TLD-based spectrometer and presents the spectral measurements performed in a point of test around DAPhiNE. The results are compared with those obtained, in the same point, with a previously validated Bonner sphere system based on an active (6)LiI(Eu) scintillator.
Bedogni
R
R
INFN LNF-U.F. Fisica Sanitaria, Via E. Fermi, 40-00044 Frascati, Italy. roberto.bedogni@lnf.infn.it
Esposito
A
A
Chiti
M
M
Angelone
M
M
D004867:Equipment Design; D019544:Equipment Failure Analysis; D009502:Neutrons; D016273:Occupational Exposure / Q000032:analysis*; D010315:Particle Accelerators / Q000295:instrumentation*; D011522:Protons; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000295:instrumentation* / Q000379:methods; D011835:Radiation Protection / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers
D011522:Protons