Electric fields in liquid water irradiated with protons at ultrahigh dose rates
Language
en
Article de revue
This item was published in
Physical Review Letters. 2023-10, vol. 131, n° 17, p. 178001
American Physical Society
English Abstract
We study the effects of irradiating water with 3 MeV protons at high doses by observing the motion of charged polystyrene beads outside the proton beam. By single-particle tracking, we measure a radial velocity of the order ...Read more >
We study the effects of irradiating water with 3 MeV protons at high doses by observing the motion of charged polystyrene beads outside the proton beam. By single-particle tracking, we measure a radial velocity of the order of microns per second. Combining electrokinetic theory with simulations of the beamgenerated reaction products and their outward diffusion, we find that the bead motion is due to electrophoresis in the electric field induced by the mobility contrast of cations and anions. This work sheds light on the perturbation of biological systems by high-dose radiations and paves the way for the manipulation of colloid or macromolecular dispersions by radiation-induced diffusiophoresis.Read less <
English Keywords
Diffusiophoresis
Electrophoresis
Chemical reactions
Irradiation effects
Interdisciplinary physics
Soft matter
Origin
Hal imported