Results 131 to 140 of about 9,749 (213)

On calculating kerma, collision kerma and radiative yields

Medical Physics, 2019
PURPOSE To study the relationships between dose (D), kerma (K) and collision kerma (Kcol) in photon beams and to investigate total radiative yields for electrons and positrons as a function of energy.
D. Rogers, R. Townson
exaly   +4 more sources

Assessment of Kerma coefficients for OSL dosimeters by analytical and Monte Carlo approaches

Radiation Physics and Chemistry, 2020
In optically stimulated luminescent dosimeters (OSLD), the intensity of luminescent is a function of the dose of radiation absorbed and then it may be utilized as the basis of a radiation dosimetry method. For photons in the energy range from 1 keV to 20 
Rahim Khabaz
exaly   +2 more sources

Kerma-Area Product in Diagnostic Radiology

American Journal of Roentgenology, 2014
W565 is traveling through air, and it is how the intensity (strength) of the x-ray beam is characterized [6]. Air kerma can be thought of as the number of individual x-ray photons per unit area, which therefore says nothing about the extent (area) of the x-ray beam. Although xray photon energies play a role in determining air kerma, this is a secondary
W. Huda
exaly   +4 more sources

Remarks and improvements on neutron KERMA factors and radiation damage cross sections calculated by NECP-Atlas and NJOY21 using different evaluated nuclear data libraries

Annals of Nuclear Energy, 2021
Liang-Zhi Cao
exaly   +2 more sources

Stray neutron radiation exposures from proton therapy: physics-based analytical models of neutron spectral fluence, kerma and absorbed dose

Physics in Medicine and Biology, 2022
Objective. Patients who receive proton beam therapy are exposed to unwanted stray neutrons. Stray radiations increase the risk of late effects in normal tissues, such as second cancers and cataracts, and may cause implanted devices such as pacemakers to ...
S. Shrestha, W. Newhauser, W. Donahue, A. Pérez-Andújar   +3 more
semanticscholar   +1 more source

Marginal Communities and Cooperative Strategies in the Kerma Pastoral State

Journal of Ancient Near Eastern History, 2022
This paper examines the relationship between marginal Nubian communities—who are culturally different and who occupy peripheral contexts—and the Kerma “pastoral state” in Upper Nubia during the Classic Kerma period (1750–1550 BCE).
C. Walsh
semanticscholar   +1 more source

Estimation of Entrance Surface Air Kerma in Digital Radiographic Examinations.

Radiation Protection Dosimetry, 2021
PURPOSE Contribution of radiation doses from medical X-ray examination to collective dose is significant. Unusually, high doses may increase the risk of stochastic effects of radiations. Therefore, radiation dose assessment was performed in 241 digital X-
Chanchal Kaushik, I. S. Sandhu, A. Srivastava, Mansi Chitkara   +3 more
semanticscholar   +1 more source

Semi-empirical determination of gamma-ray kerma coefficients for materials of shielding and dosimetry from mass attenuation coefficients

Progress in Nuclear Energy, 2017
Ahmed Mahmoud El-Khayatt
exaly   +2 more sources

Techniques for Egyptian Eyes: Diplomacy and the Transmission of Cosmetic Practices between Egypt and Kerma

, 2021
This article examines the context and distribution of Egyptian eye cosmetic equipment, kohl pots and sticks, found at Classic Kerma (c. 1650–1550 BCE) sites in Upper Nubia in modern-day Sudan. It is argued that these cosmetic assemblages, which included
C. Walsh
semanticscholar   +1 more source