Neutron dosimeters employing high-efficiency perforated semiconductor detectors

High-efficiency microstructured semiconductor neutron detectors for direct 3He replacement

“…MSNDs can be mass produced using inexpensive silicon VLSI processing techniques and readilyavailable 6 LiF neutron conversion material, among other conversion materials. The mass production capability and modularity of the MSND allows for many MSNDs to be arranged in the 3 He-tube form factor, amongst other form factors [20][21][22][23][24][25]. Hundreds of MSNDs can be produced using batch-processing methods in a single run, each with nearly identical neutron detection properties.…”

High-Efficiency Thin-Film-Coated Semiconductor Neutron Detectors for Active Dosimetry Monitors

“…Each hole was 30 μm in diameter and 76.6 μm deep. The holes were filled with 6 LiF and the top of the detector was coated with a layer of 6 LiF of thickness 39.5 μm. This design significantly increased the probability that an ejected reaction product will reach the semiconductor substrate and thus be detected.…”

“…The gamma-ray portion of this dose must be separated from the total dose in order to estimate the neutron portion. The TLD-600 dosimeters contained 95.6% 6 Li and the TLD-700 dosimeters contained 0.007% 6 Li and are thus unresponsive to neutrons. Therefore in a mixed n-γ field, the TLD-600 response is given by 600 600 600…”

High efficiency dual-integrated stacked microstructured solid-state neutron detectors

“…icrostructured semiconductor neutron detectors have been developed and studied at Kansas State University for many years [1][2][3][4][5], with much improvement in recent times [6][7][8]. The microstructured detector design offers a viable solution to the efficiency limitations of coated planar diodes, a limitation no greater than 5% [9].…”

“…In the present work, the backfilled neutron reactive material is 6 LiF, which relies on the 6 Li(n,t) 4 He reaction. When thermal neutrons are absorbed by 6 Li, a 2.73 MeV triton and a 2.05 MeV alpha particle are ejected in opposite directions.…”