Results 71 to 80 of about 16,734 (227)

The 40K‐K dating system: 1. Improving data interpretation using new model calculations

Meteoritics &Planetary Science, EarlyView.
Abstract The 40K‐K cosmic‐ray exposure (CRE) dating system offers a promising method for determining exposure ages of iron meteorites by combining the radioactive cosmogenic 40K with the stable cosmogenic isotopes 39K and 41K. However, earlier applications relied on semi‐empirical production models and inconsistent analytical data sets, limiting their ...
Farshid Nozarian, Suzette Timmerman, Ingo Leya   +2 more
wiley   +1 more source

Response simulation and primary vertex reconstruction in the SPD NICA straw tracker

Вестник Самарского университета: Естественнонаучная серия
In this work we investigate the temporal structure of the events in the spin physics detector (SPD) straw tracker at the JINR NICA. Using the Geant4 toolkit we simulate the response of the straw layers sensitive elements in the triggerfree regime of SPD.
S. D. Morozova, A. V. Shipilova
doaj   +1 more source

A comparative Monte Carlo simulation study on shielding features of the CaF2–CaO–B2O3–P2O5–SrO–Ta2O5 glass system against X-ray by GEANT4 and MCNPX codes

Scientific Reports
Regarding to their unique physical and mechanical features, glasses and glass–ceramics are suitable materials for shielding purposes. The present study evaluates the shielding properties of the CaF2–CaO–B2O3–P2O5–SrO–Ta2O5 glass system using Monte Carlo ...
Farzad. Isazadeh, Akbar. Abdi Saray
semanticscholar   +1 more source

A Low‐Power Radioisotope XRF Spectrometer for Detection of Light Elements on Planetary Missions

X-Ray Spectrometry, Volume 55, Issue 5, Page 721-729, September/October 2026.
ABSTRACT Current X‐ray spectrometers for in situ geochemical analysis on planetary missions typically rely either on X‐ray tubes, which demand electrical power and add mass and thermal complexity, or on alpha particle X‐ray spectrometers (APXS) that use rare 244 Cm sources, and come with severe concerns on radiation safety and isotope availability.
Leandro Silveri, Artem Knyazev, Hashem Alaidaros, Maryam Manzoor Amanullah, Zach Ioannou, Tengiz Ibrayev, Danish Khan, Sara Leardini, Laura Manenti, Simi Maria Emilia Mangani, Safa Naseem, Sandhya Sharma, Sara Trevisan, Alia Zino, Francesco Arneodo   +14 more
wiley   +1 more source

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, Volume 28, Issue 15, 5 August 2026.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source

Gamma-ray and Neutron Shielding Capacity of Glasses with Various Energies and (_ ^241)Am-Be Source [PDF]

Progress in Physics of Applied Materials
In this research, we have investigated features of the ionizing radiation shielding of glasses, , in the photon energy of 15 keV to 15 MeV. We have calculated mass attenuation coefficient (MAC) by using the Monte Carlo simulations such as Geant4 tool ...
H. Hosseini Sarteshnizi, M. Eshghi
doaj   +1 more source

M-TAG: A modular teaching-aid for Geant4

Heliyon, 2023
Geant4 is a versatile Monte Carlo radiation transport simulation toolkit with a steep learning curve. This work introduces a user-code called M-TAG (Modular Radiation Teaching-Aid for Geant4), built on top of Geant4.
Liam Carroll, Shirin A. Enger
doaj   +1 more source

Monte carlo assessment of advanced shielding materials for space‐efficient radiotherapy vault design

Journal of Applied Clinical Medical Physics, Volume 27, Issue 8, August 2026.
Abstract Background Conventional radiotherapy vault shielding typically employs 2 to 3 meters of ordinary concrete, consistent with NCRP Report 151 reference data. While NCRP 151 specifies dose‐based design goals rather than mandating particular materials, the practical default of concrete results in vault footprints of 150 to 200 m2 per linac, which ...
Beechui Koo, Richard Xu, Morgan Glennie, Jungwook Shin, Karl Farrey, Siyong Kim, James J. Sohn   +6 more
wiley   +1 more source

Upgrade of CMS Full Simulation for Run 2 [PDF]

EPJ Web of Conferences, 2019
We report on the status of the CMS full simulation software for Run 2 operations of the LHC. Initially, Geant4 10.0p02 was used and about 16 billion events were produced for analysis of 2015-2016 data.
Ivanchenko Vladimir, Banerjee Sunanda
doaj   +1 more source

Geant4‐DNA example applications for track structure simulations in liquid water: A report from the Geant4‐DNA Project

Medical Physics (Lancaster), 2018
This Special Report presents a description of Geant4-DNA user applications dedicated to the simulation of track structures (TS) in liquid water and associated physical quantities (e.g., range, stopping power, mean free path…).
S. Incerti, S. Incerti, I. Kyriakou, M. Bernal, M. Bordage, M. Bordage, Z. Francis, S. Guatelli, S. Guatelli, V. Ivanchenko, M. Karamitros, Nathanael Lampe, Sang Bae Lee, S. Meylan, C. Min, W. Shin, P. Nieminen, D. Sakata, D. Sakata, D. Sakata, Nicolas Tang, C. Villagrasa, H. Tran, J. Brown   +23 more
semanticscholar   +1 more source