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Energetic ions lose their energy in tissue mainly by ionising its molecules. This produces secondary electrons which transport this energy radially away from the ion path. The ranges of most of these electrons do not exceed a few…

Biological Physics · Physics 2017-11-07 Pablo de Vera , Eugene Surdutovich , Nigel J. Mason , Andrey V. Solov'yov

To analyze hydration effects on macromolecular diffusion, the friction coefficients of macromolecules were examined using molecular dynamics simulations with an all-atom model. In the present study, a method was introduced to decompose the…

Biological Physics · Physics 2024-09-26 Tomoya Iwashita , Yuki Uematsu , Masahide Terazima , Ryo Akiyama

We attempt to understand the low-mass dielectron enhancement observed by PHENIX Collaboration at Relativistic Heavy Ion Collider (RHIC) by transport peak in the spectral function. On the basis of the second-order formalism of relativistic…

Nuclear Theory · Physics 2013-05-30 Yukinao Akamatsu , Hideki Hamagaki , Tetsuo Hatsuda , Tetsufumi Hirano

We present a probabilistic approach to water-water hydrogen bonding that allows one to obtain an analytic expression for the number of bonds per water molecule as a function of both its distance to a hydrophobic particle and hydrophobe…

Soft Condensed Matter · Physics 2013-03-20 Yuri S. Djikaev , Eli Ruckenstein

The slow dynamics of glass-forming liquids is generally ascribed to the cage-jump motion. In the cage-jump picture, a molecule remains in a cage formed by neighboring molecules, and after a sufficiently long time, it jumps to escape from…

Soft Condensed Matter · Physics 2019-05-24 Takuma Kikutsuji , Kang Kim , Nobuyuki Matubayasi

The planetary exospheres are poorly known in their outer parts, since the neutral densities are low compared with the instruments detection capabilities. The exospheric models are thus often the main source of information at such high…

Earth and Planetary Astrophysics · Physics 2016-04-15 Arnaud Beth , Philippe Garnier , Dominique Toublanc , Iannis Dandouras , Christian Mazelle

Aqueous mixtures of 1-propanol have been investigated by high-energy synchrotron X-ray diffraction upon cooling. X-ray weighted total scattering structure factors of 6 mixtures, from 8 mol% to 89 mol% alcohol content, as well as that of…

Chemical Physics · Physics 2021-08-25 Ildikó Pethes , László Pusztai , Koji Ohara , László Temleitner

I have investigated the structural and dynamic properties of water by performing a series of molecular dynamic simulations in the range of temperatures from 213 K to 360 K, using the Simple Point Charge-Extended (SPC/E) model. I performed…

Soft Condensed Matter · Physics 2010-02-23 M. G. Campo

In this paper we investigate the dynamical properties of a spatially periodic reaction-diffusion system {whose reaction terms are of hybrid nature in the sense that they are partly competitive and partly cooperative depending on the value…

Analysis of PDEs · Mathematics 2021-08-25 Quentin Griette , Hiroshi Matano

The dynamics of a freely diffusing particle in a two-dimensional channel with cross sectional area $A(x)$, can be effectively described by a one-dimensional diffusion equation under the action of a potential of mean force $U(x)=-k_BT\ln…

Statistical Mechanics · Physics 2019-02-28 Matan Sivan , Oded Farago

Photoionization fronts play a dominant role in many astrophysical environments, but remain difficult to achieve in a laboratory experiment. Recent papers have suggested that experiments using a nitrogen medium held at ten atmospheres of…

Solar and Stellar Astrophysics · Physics 2019-05-22 William J. Gray , P. A. Keiter , H. Lefevre , C. R. Patterson , J. S. Davis , K. G. Powell , C. C. Kuranz , R. P. Drake

Thermodiffusion in aqueous electrolyte solutions exhibits complex dependencies on temperature, concentration, and salt composition, yet its microscopic origins remain incompletely understood. Here, we employ non-equilibrium molecular…

Soft Condensed Matter · Physics 2026-04-21 Guansen Zhao , Fernando Bresme

Radiation chemistry of model systems irradiated with ultra-high dose-rates (UHDR) is key to obtain a mechanistic understanding of the sparing of healthy tissue, which is called the FLASH effect. It is envisioned to be used for efficient…

Medical Physics · Physics 2025-11-03 Marc Benjamin Hahn

Hydrogen loss from a-SiNx:H films under irradiation with 100 MeV Ag7+ ions using elastic recoil detection analysis (ERDA) experiments is reported. The results are explained under the basic assumptions of the molecular recombination model.…

Applied Physics · Physics 2018-04-18 R. K. Bommali , S. Ghosh , S. A. Khan , P. Srivastava

By applying a Bayesian model-to-data analysis, we estimate the temperature and momentum dependence of the heavy quark diffusion coefficient in an improved Langevin framework. The posterior range of the diffusion coefficient is obtained by…

Nuclear Theory · Physics 2018-01-31 Yingru Xu , Marlene Nahrgang , Shanshan Cao , Jonah E. Bernhard , Steffen A. Bass

The combinatorial explosion of empirical parameters in tens of thousands presents a tremendous challenge for extended Debye-H\"uckel models to calculate activity coefficients of aqueous mixtures of most important salts in chemistry. The…

Soft Condensed Matter · Physics 2018-03-14 Jinn-Liang Liu , Bob Eisenberg

Hydrocarbon pyrolysis is a complex chemical reaction system at extreme temperature and pressure conditions involving large numbers of chemical reactions and chemical species. Only two kinds of atoms are involved: carbons and hydrogens. Its…

Chemical Physics · Physics 2026-02-10 Perrin E. Ruth , Vincent Dufour-Decieux , Christopher Moakler , Maria Cameron

Microscale oxygenation plays a prominent role in tumour progression. Spatiotemporal variability of oxygen distribution in the tumour microenvironment contributes to cellular heterogeneity and to the emergence of normoxic and hypoxic…

Tissues and Organs · Quantitative Biology 2022-01-28 Jesús J. Bosque , Gabriel F. Calvo , María Cruz Navarro

By taking into account the effects of leading particles, we discuss the pseudorapidity distributions of the charged particles produced in high energy heavy ion collisions in the context of evolution-dominated hydrodynamic model. The leading…

Nuclear Theory · Physics 2014-01-07 Z. J. Jiang , H. L. Zhang , J. Wang , K. Ma

Atomic hydrogen loss at the top of HD 209458b's atmosphere has been recently detected Vidal-Madjar et al. 2003. We have developed a 1-dimensional model to study the chemistry in the upper atmosphere of this extrasolar "hot jupiter". The 3…

Astrophysics · Physics 2009-11-10 Mao-Chang Liang , Christopher D. Parkinson , Anthony Y. -T. Lee , Yuk L. Yung