A gamma-ray source with an intense component around the giant dipole resonance for photonuclear absorption has been obtained via bremsstrahlung of electron bunches driven by a 10-TW tabletop laser. 3D particle-in-cell simulation proves the achievement of a nonlinear regime leading to efficient acceleration of several sequential electron bunches per each laser pulse. The rate of the gamma-ray yield in the giant dipole resonance region (8 < E(gamma)< 17.5 MeV) was measured, through the radio activation of a gold sample, to be 4x10(8) photons per joule of laser energy. This novel all-optical, compact, and efficient electron-gamma source is suitable for photonuclear studies and medical uses.
|Autori:||Giulietti A; Bourgeois N; Ceccotti T; Davoine X; Dobosz S; D'Oliveira P; Galimberti M; Galy J; Gamucci A; Giulietti D; Gizzi LA; Hamilton DJ; Lefebvre E; Labate L; Marques JR; Monot P; Popescu H; Reau F; Sarri G; Tomassini P; Martin P|
|Titolo:||Intense gamma-ray source in the giant-dipole-resonance range driven by 10-TW laser pulses RID B-9835-2009 RID G-4487-2011 RID A-5215-2011|
|Anno del prodotto:||2008|
|Digital Object Identifier (DOI):||10.1103/PhysRevLett.101.105002|
|Appare nelle tipologie:||1.1 Articolo in rivista|