[ RadSafe ] A hitherto unrecognized source of low-energy electrons in water

[Cary Renquist]

The phenomena might also be involved in solvent/solute interactions...

Cary
--
Cary.renquist at ezag.com


We identify a hitherto unrecognized extra source of low-energy electrons produced by a non-local autoionization process called intermolecular coulombic decay2 (ICD). ... As ICD is expected to take place universally in weakly bound aggregates containing light atoms between carbon and neon in the periodic table, these results could have implications for our understanding of ionization damage in living tissues.

General article:
How do free electrons originate? 
http://bit.ly/7KoOLb



Nature Abstract:
A hitherto unrecognized source of low-energy electrons in water
http://bit.ly/65O0Rn

Melanie Mucke1, Markus Braune2, Silko Barth1, Marko Förstel1,3, Toralf Lischke1, Volker Ulrich1, Tiberiu Arion1, Uwe Becker2, Alex Bradshaw1,2 & Uwe Hergenhahn1,4

Low-energy electrons are the most abundant product of ionizing radiation in condensed matter. The origin of these electrons is most commonly understood to be secondary electrons1 ionized from core or valence levels by incident radiation and slowed by multiple inelastic scattering events. Here, we investigate the production of low-energy electrons in amorphous medium-sized water clusters, which simulate water molecules in an aqueous environment. We identify a hitherto unrecognized extra source of low-energy electrons produced by a non-local autoionization process called intermolecular coulombic decay2 (ICD). The unequivocal signature of this process is observed in coincidence measurements of low-energy electrons and photoelectrons generated from inner-valence states with vacuum-ultraviolet light. As ICD is expected to take place universally in weakly bound aggregates containing light atoms between carbon and neon in the periodic table2, 3, these results could have implications for our understanding of ionization damage in living tissues.