Neutron dosimetry with solid state nuclear track detectors

Radiation Dosimetry and SSNTD Instrumentation

“…A number of workers have discussed the use of elastic recoils and (n, a) reactions in neutron dosimetry. 12 ' [23][24][25][26][27][28] The recoil-track density in some plastics seems to show a dependence on neutron energy above ~0.5 MeV which is similar to that of the first-collision dose in tissue. 24 This is obviously helpful in computing the dose imparted to the human body by fast neutrons.…”

Characterization of a novel passive personal fast neutron dosimeter based on a CR-39 track detector in monochromatic neutron fields via Monte Carlo simulations and experiments

“…Fast neutron dosimetry has become more and more relevant in the last decades due to the development of a wide range of human activities involving the presence of high-energy neutron, such as cosmic-ray neutrons in high-altitude/space activities or secondary neutrons produced in particle accelerator-based activities. Solid state nuclear track detectors (SSNTDs), such as CR-39 or LR-115, can be used as effective dosimeters for the fields just described, if properly calibrated [1]. In particular, when used for fast neutron dosimetry, SSNTDs are usually placed behind a proper radiator [2] and the signal is mainly due to charged secondaries produced by fast neutrons hitting the radiator: some of the damages to the detector polymer chains caused by such charged particles become tracks visible under a microscope after a proper chemical treatment known as etching.…”

Neutron response study using poly allyl diglycol carbonate

“…SSNTDs have some advantages compared to other neutron detectors, such as long time stability, insensitivity to gamma radiation, small size, light weight, low price, etc. CR-39 detector has been recognized as one of the best detectors for fast neutron measurements, due to its high sensitivity to light ions, in particular to protons [4][5][6]. Thermal neutron dosimetry uses a fissile material as a converter to produce fission fragments and alpha particles, which are registered in the track detector placed behind the converter.…”