Intense γ-ray source in the giant-dipole-resonance range driven by 10-tw laser pulses

Giulietti, A. et al. (2008) Intense γ-ray source in the giant-dipole-resonance range driven by 10-tw laser pulses. Physical Review Letters, 101(10), p. 105002. (doi: 10.1103/PhysRevLett.101.105002)

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A γ-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 γ-ray yield in the giant dipole resonance region (8<E<sub>γ</sub><17.5  MeV) was measured, through the radio activation of a gold sample, to be 4×10<sup>8</sup> photons per joule of laser energy. This novel all-optical, compact, and efficient electron-γ source is suitable for photonuclear studies and medical uses.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Hamilton, Dr David
Authors: Giulietti, A., Bourgeois, N., Ceccotti, T., Davoine, X., Dobosz, S., D’Oliveira, P., Galimberti, M., Galy, J., Gamucci, A., Giulietti, D., Gizzi, L.A., Hamilton, D.J., Lefebvre, E., Labate, L., Marquès, J.R., Monot, P., Popescu, H., Réau, F., Sarri, G., Tomassini, P., and Martin, P.
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN (Online):1079-7114

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