Results 101 to 110 of about 444,397 (341)

Updated model of cosmic-ray-induced ionization in the atmosphere (CRAC:CRII_v3): Improved yield function and lookup tables

Journal of Space Weather and Space Climate
Cosmic rays, including galactic cosmic rays and solar energetic particles, form the main source of ionization of the low and middle atmosphere, which is important for various chemical and physical effects in the atmosphere.
Usoskin I.G., Kovaltsov G.A., Mishev A.L.   +2 more
doaj   +1 more source

Unstable Leader Inception Criteria of Atmospheric Discharges

Atmosphere, 2017
In the literature, there are different criteria to represent the formation of a leader channel in short and long gap discharges. Due to the complexity of the physics of the heating phenomena, and the limitations of the computational resources, a ...
Liliana Arevalo, Vernon Cooray
doaj   +1 more source

Ions and Ionization [PDF]

Scientific American, 1906
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openaire   +1 more source

Measurement of CT radiation beam width with a pencil ionization chamber and radiopaque mask

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose This study compares fan beam CT scanner radiation beam widths measured with a pencil ionization chamber‐radiopaque mask technique with commonly used film and computed radiography (CR) measurements. Methods For a given fan beam CT scanner x‐ray beam, the ionization chamber‐mask technique determines the radiation beam width by exposing a
Rani Al‐Senan, David M. Gauntt, Gary T. Barnes   +2 more
wiley   +1 more source

Cross-Sections for Projectile Ionization, Electron Capture, and System Breakdown of C⁵⁺ and Li²⁺ Ions with Atomic Hydrogen

Atoms
For many disciplines of science, all conceivable collisional cross-sections and reactions must be precisely known. Although recent decades have seen a trial of large-scale research to obtain such data, many essential atomic and molecular cross-section ...
Saed J. Al Atawneh
doaj   +1 more source

Modelling of a double‐scattering proton therapy nozzle using the FLUKA Monte Carlo code and analysis of linear energy transfer in patients treated for prostate cancer

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Background The dose‐averaged linear energy transfer (LETD) in proton therapy (PT) has in pre‐clinical studies been linked to the relative biological effectiveness (RBE) of protons. Until recently, the most common PT delivery method in prostate cancer has been double‐scattered PT, with LETD only available through dedicated Monte Carlo (MC ...
Rasmus Klitgaard, Lars Fredrik Fjæra, Camilla Hanquist Stokkevåg, Perry Johnson, Mark Artz, Nancy Price Mendenhall, Curtis Bryant, Ludvig Paul Muren   +7 more
wiley   +1 more source

Global perceptions and acceptance of irradiated food: a comparative systematic review

Italian Journal of Food Safety
Irradiated food acceptance around the world exhibits systematic variabilities across many facets related to citizens' perceived approval ratings of the product.
Jaber Maataoui, Malek Abduljaber, Mohamed Khaddor   +2 more
doaj   +1 more source

Commissioning a standalone adaptive radiotherapy linac in a multi‐vendor environment

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Current radiotherapy machines intended to perform streamlined online adaptive therapy are designed to be standalone, which makes it challenging to integrate them with the rest of the clinic. This work describes the installation of a standalone CT‐guided online adaptive system, the Varian Ethos, in a busy clinic utilizing products from multiple
Sven Olberg, David M. McClatchy 3rd, Colleen Foote, Susu Yan, Jennifer Pursley   +4 more
wiley   +1 more source

Feasibility study of skin dosimetry with TLD sheets for measuring the effect of 3D printed bolus in radiotherapy

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract The thermoluminescence dosimeter (TLD) sheet is a measurement device coated with manganese‐doped LiB3O5 in sheet form. The sheet is 0.2‐mm thick and flexible. Hence, it can fit and be installed on irregular surfaces. The current study aimed to evaluate the feasibility of measuring patient surface doses during radiation therapy using TLD sheets.
Yuya Miyasaka, Mayumi Ichikawa, Takagi Akira, Yoshifumi Yamazawa, Hongbo Chai, Hikaru Souda, Miyu Ishizawa, Hiraku Sato, Takeo Iwai   +8 more
wiley   +1 more source

Ionization Phenomena in Discharges: Conference in Oxford [PDF]

, 1953

openalex   +1 more source