Background: The amount of average dose enhancement in tumor loaded with 10B may vary due to various factors in boron neutron capture therapy.Objective: This study aims to evaluate dose enhancement in tumor loaded with 10B under influence of various factors and investigate the dependence of this dose enhancement on neutron spectra changes.Material and Methods: In this simulation stud...

A first comparison has been made between the pulse-shape discrimination characteristics of a novel He-based pressurized scintillation detector and a NE-213 liquid-scintillator reference detector using an Am/Be mixed-field neutron and gamma-ray source and a high-resolution scintillation-pulse digitizer. In particular, the capabilities of the two fast neutron detectors to discriminate between neu...

Microdosimetry study has been carried out at the education and research mini-reactor of Kinki University (UTR-KINKI) using a tissue equivalent gas proportional counter (TEPC). The microdosimetric single event spectra for 0.5, 1, 2, 3 and 5 microm site sizes were obtained in the lineal energy range from 1 to 1000 keV/microm. Neutron and gamma-ray fractional doses were estimated from the single e...

In case of an accidental overexposure to ionizing radiation where the dose received by the victim is over 5 Gy, the conventional biological indicator of dose, the dicentric assay, does not provide an accurate enough dose measurement. A more appropriate technique is to measure ring chromosomes in stimulated lymphocytes. Dose-effect relationships were obtained by plotting the frequencies of Prema...

In boron neutron capture therapy, the total absorbed dose is sum of four components with different relative biological effectiveness (RBE): dose, “nitrogen” fast and γ-ray dose. We present a new approach for measuring first three doses. this work, we provide details method measurement results when proposed employed.

Neutron Activation Analysis Prognosis and Optimization (NAAPRO) code was applied for the prognosis of activation products, their activities, number counts recorded in detector, minimum detection limits as well gamma spectrum obtained fast neutron analysis experiments. Simulations were performed geological biological reference materials irradiated with 14 MeV neutrons at 5.5 MV NCSRD tandem acce...

Two classes of X-ray/$\gamma$-ray sources, the Soft Gamma Repeaters and Anomalous X-ray Pulsars have been identified with isolated, slowly spinning magnetars, neutron stars whose emission draws energy from their extremely strong magnetic field ($\sim 10^{15}-10^{16}$ G). Magnetars are believed to form millisecond spin period represent an important fraction whole population young stars. Newborn ...

Solid state thermal neutron detectors are desirable for replacing the current He based technology, which has some limitations arising from stability, sensitivity to microphonics and the recent shortage of He. Our approach to designing such solid state detectors is based on the combined use of high aspect ratio silicon PIN pillars surrounded by B, the neutron converter material. To date, our hig...