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Novel radiotherapy techniques like synchrotron X-ray microbeam radiation therapy (MRT), require fast dose distribution predictions that are accurate at the sub-mm level, especially close to tissue/bone/air interfaces. Monte Carlo physics…

We give a precision analysis of the correlation coefficients of the electron-energy spectrum and angular distribution of the beta decay and radiative beta decay of the neutron with polarized neutron and electron to order 10^(-3). The…

High Energy Physics - Phenomenology · Physics 2021-02-04 A. N. Ivanov , R. Höllwieser , N. I. Troitskaya , M. Wellenzohn , Ya. A. Berdnikov

This study presents a proof-of-concept for a novel Bayesian inverse method in a one-dimensional setting, aimed at proton beam therapy treatment verification. Our methodology is predicated on a hypothetical scenario wherein strategically…

Applications · Statistics 2023-11-21 Alexander M. G. Cox , Laura Hattam , Andreas E. Kyprianou , Tristan Pryer

Purpose: In treatment planning of charged-particle radiotherapy, patient heterogeneity is conventionally modeled as variable-density water converted from CT images to best reproduce the stopping power, which may lead to inaccuracies in the…

Medical Physics · Physics 2013-01-08 Nobuyuki Kanematsu , Taku Inaniwa , Yusuke Koba

A model for the simulation of orientational effects in straight and bent periodic atomic structures is presented. The continuum potential approximation has been adopted.The model allows the manipulation of particle trajectories by means of…

Computational Physics · Physics 2014-10-02 E. Bagli , M. Asai , D. Brandt , A. Dotti , V. Guidi , D. H. Wright

It is shown that the ratio of the deuteron and proton analysing powers in proton-deuteron elastic scattering at small angles is sensitive to subtle effects in a theoretical description. These include the transverse spin-spin term in the…

Nuclear Theory · Physics 2019-05-22 Yu. Uzikov , C. Wilkin

In this letter, we analyse and interpret the kinematic power corrections to deeply virtual Compton scattering dispersion relation. We show that the kinematic corrections at twist-4 can be connected to other form factors of the…

High Energy Physics - Phenomenology · Physics 2026-03-05 Víctor Martínez-Fernández , Daniele Binosi , Cédric Mezrag , Zhao-Qian Yao

A correlation between the angle of multiple scattering and the ionization energy loss for relativistic electrons in an amorphous medium is computed by solving the combined transport equation. The correlation is found to be the most…

High Energy Physics - Phenomenology · Physics 2021-06-02 M. V. Bondarenco

High energy spread caused by the longitudinal size of the beam is well known in wake-field acceleration. Usually this issue can be solved with beam loading effect that allows to keep accelerating field nearly constant, along the whole…

Accelerator Physics · Physics 2018-12-26 V. Shpakov , E. Chiadroni , A. Curcio , H. Fares , M. Ferrario , A. Marocchino , F. Mira , V. Petrillo , A. R. Rossi , S. Romeo

A proton pencil beam is associated with a surrounding low-dose envelope, originating from nuclear interactions. It is important for treatment planning systems to accurately model this envelope when performing dose calculations for pencil…

Medical Physics · Physics 2015-11-30 David C. Hall , Anastasia Makarova , Harald Paganetti , Bernard Gottschalk

We present measurements of slice energy spread at the injector section of the European X-Ray Free Electron Laser for an electron bunch with charge of 250 pC. Two methods considered in the paper are based on measurements at the dispersive…

Accelerator Physics · Physics 2021-06-09 Sergey Tomin , Igor Zagorodnov , Winfried Decking , Nina Golubeva , Matthias Scholz

The total nuclear cross-section Qtot(E) resulting from the interaction of protons with nuclei is decomposed in 3 different contributions: 1. elastic scatter at the complete nucleus, which adopts a part of the proton kinetic energy; 2.…

Medical Physics · Physics 2016-05-10 W. Ulmer

We investigated the behavior of the spectral slope of interplanetary magnetic field fluctuations at proton scales for selected high resolution time intervals from WIND and MESSENGER spacecraft at $1$ AU and $0.56$ AU, respectively. The…

Solar and Stellar Astrophysics · Physics 2015-06-22 R. Bruno , L. Trenchi , D. Telloni

We perform advanced radiation leakage microscopy of routing dielectric-loaded plasmonic waveguiding structures. By direct plane imaging and momentum-space spectroscopy, we analyze the energy transfer between coupled waveguides as a function…

The angular, spectral and temporal features of the highest energy protons and accompanying them secondary neutrinos and synchrotron gamma-rays propagating through the intergalactic magnetic and radiation fields are studied using the…

High Energy Astrophysical Phenomena · Physics 2014-11-21 F. A. Aharonian , S. R. Kelner , A. Y. Prosekin

At low $x \cong Q^2/W^2 << 1$, in deep inelastic scattering, the photon fluctuates into a $q \bar q$ vector state that interacts via two gluons with the proton. The energy dependence is determined by the saturation scale, in our approach…

High Energy Physics - Phenomenology · Physics 2007-05-23 Masaaki Kuroda , Dieter Schildknecht

We propose and analyze in detail a method to measure the in-air spatial spread parameter of clinical electron beams. Measurements are performed at the center of the beam and below the adjustable collimators sited in asymmetrical…

Medical Physics · Physics 2009-10-31 M. Vilches , J. C. Zapata , D. Guirado , D. Fernández , D. Burgos , A. M. Lallena

This work presents further analysis of the three- and four-neutron systems in the low energy regime using adiabatic hyperspherical methods. In our previous Phys. Rev. Lett. article (Phys. Rev. Lett. 125, 052501 (2020)), the low-energy…

Nuclear Theory · Physics 2021-03-03 Michael D. Higgins , Chris H. Greene , Alejandro Kievsky , Michele Viviani

Monte Carlo calculations using the codes PENELOPE and GEANT4 have been performed to characterize the dosimetric properties of monoenergetic photon point sources in water. The dose rate in water has been calculated for energies of interest…

Medical Physics · Physics 2015-06-26 Julio F. Almansa , Rafael Guerrero , Feras M. O. Al-Dweri , M. Anguiano , A. M. Lallena

We analyse the proton recoil energy and angular distribution of the radiative beta-decay of the neutron to leading order in the large baryon mass expansion by taking into account the contributions of the proton-photon correlations. We show…

High Energy Physics - Phenomenology · Physics 2013-09-30 A. N. Ivanov , R. Hollwieser , N. I. Troitskaya , M. Wellenzohn
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