title: Comparison between gold nanoparticle and gold plane electron emissions: a way to identify secondary electron emission.
abstract: To understand the nanoparticle radiosensitising effect observed in the radiotherapy context, it is necessary to study the nanoparticle electron emission under x-ray irradiation, which is one of the causes of the radiosensitisation. In this paper, we compare the electron energy spectrum of gold samples irradiated by 1253.6 eV x-ray photons for energies down to 2 eV for nanoparticles and for a plane surface. This comparison highlights important differences due to nanoparticle properties especially at low energy, allowing the identification of strong nanoparticle secondary electron emission. This strong nanoparticle emission could play a very important role in radiosensitisation mechanisms.
authors.affiliation: LCAR: UMR 5589, IRSAMC, Université Paul Sabatier, 118 route de Narbonne 31062 Toulouse Cedex 9, France.
authors.forename: R
authors.initials: R
authors.lastname: Casta
authors.forename: J-P
authors.initials: JP
authors.lastname: Champeaux
authors.forename: M
authors.initials: M
authors.lastname: Sence
authors.forename: P
authors.initials: P
authors.lastname: Moretto-Capelle
authors.forename: P
authors.initials: P
authors.lastname: Cafarelli
mesh_terms: D004583:Electrons; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D017785:Photons; D011838:Radiation-Sensitizing Agents; D014965:X-Rays
chemical_list: D011838:Radiation-Sensitizing Agents; D006046:Gold