Background: Monte Carlo and experimental relative dose determination in a water phantom, due to a high dose rate (HDR) 192Ir source is presented for real energy spectrum and monochromatic at 356 keV. Materials and Methods: The dose distribution has been calculated around the 192Ir located in the center of 30 cm ×30 cm ×30 cm water phantom using MCNP4C code by Monte Carlo method. Relati...

Background: In treating patients with radiation, the degree of accuracy for the delivery of tumor dose is recommended to be within ± 5% by ICRU in report 24. The experimental studies have shown that the presence of low-density inhomogeneity in areas such as the lung can lead to a greater than 30% change in the water dose data. Therefore, inhomogeneity corrections should be used in treatment pla...

In the event of a radiological accident caused by an external source, estimating the dose distribution in the victim's body is a relevant indicator in assessing biological damage from this exposure. This dose distribution can be assessed by physical dosimetric reconstruction methods. Physical dosimetric reconstruction can be achieved using experimental or numerical techniques. This article pres...

Một phiên bản phần mềm MCNP–MCNP4C2– được bổ sung các mô tả chi tiết hơn về quá trình hồi phục trạng thái (relaxation) của nguyên tử sau hiệu ứng quang điện trong mã nguồn và thư viện, nhằm phỏng đáp phổ cấu hình XRF. Phần đã chỉnh sửa dùng để XRF 6 mẫu kim loại Ni, Cu, Zn, Pd, Ag, Au một số hợp chúng trên hệ Đối với loại, sai lệch giữa thực nghiệm tỷ cặp vạch Kb1/Ka1 (Lb1/La1) vào khoảng 4%-11...

The biological effects of acute, high doses of radiation are well understood. However, the effects of chronic, low doses are not as clear. Mice irradiation experiments to study the correlation of biological effects with chronic low dose rates are underway in order to make conclusions about the effects of low doses. Yet, in order to do so, the level of dose provided to the animals must be determ...

The increasing consumption of fossil fuel resources in the world has placed emphasis on flow measurements oil industry. This generated a growing niche flowmeter In this regard, study, an artificial neural network (ANN) and various feature extractions have been utilized to enhance precision X-ray radiation-based two-phase flowmeters. detection system proposed article comprises tube, NaI detector...

Quality control of X-ray tubes for medical radiodiagnostic services is very important for those devices. Therefore, it is convenient to develop new procedures to characterise the X-ray primary beam, obtaining an accurate assessment of the actual photon spectrum. The Compton scattering technique is very useful to determinate X-ray spectra (in the 10 – 150 kVp range), avoiding the pile-up effect ...