Intense gamma-ray source in the giant-dipole-resonance range driven by 10-TW laser pulses.
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 4 x 10;{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.
Giulietti
A
A
Intense Laser Irradiation Laboratory, IPCF, Consiglio Nazionale delle Ricerche, CNR Campus, Pisa, Italy.
Bourgeois
N
N
Ceccotti
T
T
Davoine
X
X
Dobosz
S
S
D'Oliveira
P
P
Galimberti
M
M
Galy
J
J
Gamucci
A
A
Giulietti
D
D
Gizzi
L A
LA
Hamilton
D J
DJ
Lefebvre
E
E
Labate
L
L
Marquès
J R
JR
Monot
P
P
Popescu
H
H
Réau
F
F
Sarri
G
G
Tomassini
P
P
Martin
P
P