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Relativistic laser pulses can accelerate electrons up to energies of several GeV during the interaction with gaseous targets through the direct laser acceleration (DLA) mechanism. While the electrons are accelerated to high energies, they…

Plasma Physics · Physics 2026-01-22 Robert Babjak , Marija Vranic

We report the best figure-of-merit achieved for an internal nuclear polarized hydrogen gas target and a Monte Carlo simulation of spin-exchange optical pumping. The dimensions of the apparatus were optimized using the simulation and the…

Atomic Physics · Physics 2009-11-11 B. Clasie , C. Crawford , J. Seely , W. Xu , D. Dutta , H. Gao

The possibility of nuclear reactions within a low voltage DC deuterium discharge with palladium electrodes is addressed. The solid-state nuclear track detector known as CR-39 was chosen to investigate the emission of energetic charged…

Nuclear Experiment · Physics 2024-02-09 Erik P. Ziehm , George H. Miley

Cold plasma technologies are an efficient approach to improve the germination properties of seeds, especially in a stacking configuration within a dielectric barrier device. In such dry atmospheric plasma priming process, we show that a…

Plasma Physics · Physics 2021-10-20 T. Dufour , Q. Gutierrez

The unitary isobar model MAID is used for a partial wave analysis of pion photoproduction and electroproduction data on the nucleon. In particular we have taken emphasis on the region of the Delta(1232) resonance and have separated the…

Nuclear Theory · Physics 2008-11-26 L. Tiator , S. Kamalov

Spatially fractionated radiation therapy (SFRT or GRID) is an approach to deliver high local radiation doses in an 'on-off' pattern. To better appraise the radiobiological effects from GRID, a framework to link local radiation dose to…

Medical Physics · Physics 2023-01-25 D. Arous , J. L. Lie , B. V. Håland , M. Børsting , N. F. J. Edin , E. Malinen

Long-lived radon daughters are a critical background source in experiments searching for low-energy rare events. Originating from radon in ambient air, radioactive polonium, bismuth and lead isotopes plate-out on materials that are later…

Instrumentation and Detectors · Physics 2021-05-05 S. Bruenner , D. Cichon , G. Eurin , P. Herrero Gómez , F. Jörg , T. Marrodán Undagoitia , H. Simgen , N. Rupp

Worldwide several radiation sources contribute to the delivered dose to the human population. This radiation also acts as natural background when detecting radiation, for instance from radioactive sources. In this work a medium-size plastic…

Instrumentation and Detectors · Physics 2017-09-20 Luis Peralta

Monte Carlo (MC) simulation is considered as the most accurate method for radiation dose calculations. Accuracy of a source model for a linear accelerator is critical for the overall dose calculation accuracy. In this paper, we presented an…

Medical Physics · Physics 2015-03-06 Zhen Tian , Yongbao Li , Michael Folkerts , Feng Shi , Steve B. Jiang , Xun Jia

Plasma outflows from gamma-ray bursts (GRB), pulsar winds, relativistic jets, and ultra-intense laser targets radiate high energy photons. However, radiation damping is ignored in conventional PIC simulations. In this letter, we study the…

Astrophysics · Physics 2007-05-23 Koichi Noguchi , Edison Liang , Kazumi Nishimura

The rate for the photon emission accompanying orbital 1S electron capture by the atomic nucleus is recalculated. While a photon can be emitted by the electron or by the nucleus, the use of the length gauge significantly suppresses the…

Nuclear Theory · Physics 2008-11-26 K. Pachucki , U. D. Jentschura , M. Pfutzner

Background: Promising results for mammary carcinoma treatment with photodynamic therapy (PDT) presuppose a careful selection of irradiation light wavelength. Methods: 4T1 tumors implanted in NOD-SCID mice were treated with Metvix-PDT under…

A lithium droplet transport and evaporation model has been developed within the Direct Simulation Monte Carlo code OpenEdge. This model integrates gravity, collisional ion drag, orbital-motion-limited charging, energy-balance evaporation,…

Plasma Physics · Physics 2026-04-03 A. Diaw , J. D. Lore , S. Smolentsev

The radiation damping effect on the diamagnetic relativistic pulse accelerator (DRPA) is studied in two-and-half dimensional Particle-in-Cell (PIC) simulation with magnetized electron-positron plasmas. Self-consistently solved radiation…

Astrophysics · Physics 2007-05-23 K. Noguchi , E. Liang

The sterilization of medical devices using the gamma rays from the decay of cobalt-60 has accumulated decades of experience of the performance of the materials and devices that are irradiated. The use of radiation using electron beams and…

Medical Physics · Physics 2023-10-03 Thomas K. Kroc

We describe the calculation of the stochastically heated dust emission using the 3D ray-tracing dust radiative transfer code DART-Ray, which is designed to solve the dust radiative transfer problem for galaxies with arbitrary geometries. In…

Precise measurement of half-life of $^{212}$Po (one of the daughter nuclides in radioactive chain of $^{232}$Th) was realized by means of liquid scintillator based on toluene doped by complex of thorium and trioctylphosphine oxide with…

In Radiation Physics classes, point sources are typically used, for which it is relatively easy to describe the signal obtained by a radiation detector, such as the NaI(Tl) scintillation detector. The use of large extended radiation sources…

Physics Education · Physics 2023-11-16 Luis Peralta

Forthcoming fixed-target coherent elastic neutrino-nucleus scattering experiments aim at measurements with $\cal{O}(\text{tonne})$-scale detectors and substantially reduced systematic and statistical uncertainties. With such high quality…

High Energy Physics - Phenomenology · Physics 2023-08-30 D. Aristizabal Sierra

I have used Monte Carlo models with multiple scattering to predict the dust scattered light from our Galaxy and have compared the predictions with data in two UV bands from the GALEX spacecraft. I find that 90\% of the scattered light…

Astrophysics of Galaxies · Physics 2016-04-12 Jayant Murthy