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Phys. Rev. Lett. 101, 105002 (2008) [4 pages]

Intense γ-Ray Source in the Giant-Dipole-Resonance Range Driven by 10-TW Laser Pulses

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A. Giulietti1,2, N. Bourgeois3, T. Ceccotti4, X. Davoine5, S. Dobosz4, P. D’Oliveira4, M. Galimberti1,*, J. Galy6, A. Gamucci1,2, D. Giulietti1,2,7, L. A. Gizzi1,2, D. J. Hamilton6,†, E. Lefebvre5, L. Labate1,2, J. R. Marquès3, P. Monot4, H. Popescu4, F. Réau4, G. Sarri1, P. Tomassini1,8, and P. Martin4
1Intense Laser Irradiation Laboratory, IPCF, Consiglio Nazionale delle Ricerche, CNR Campus, Pisa, Italy
2INFN, Sezione di Pisa, Italy
3Laboratoire pour l’Utilisation des Lasers Intenses, CNRS UMR 7605, Ecole Polytechnique, Palaiseau, France
4CEA-DSM/DRECAM/SPAM, Gif sur Yvette Cedex, France
5Département de Physique Théorique et Appliquée, CEA/DIF, 91680 Bruyères-le-Châtel, France
6European Commission, JRC Institute for Transuranium Elements, Karlsruhe, Germany
7Dipartimento di Fisica, Università di Pisa, Pisa, Italy
8INFN, Sezione di Milano, Italy

Received 16 November 2007; published 3 September 2008

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<Eγ<17.5  MeV) was measured, through the radio activation of a gold sample, to be 4×108 photons per joule of laser energy. This novel all-optical, compact, and efficient electron-γ source is suitable for photonuclear studies and medical uses.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.105002
DOI:
10.1103/PhysRevLett.101.105002
PACS:
52.59.−f, 52.38.Kd, 52.65.Rr

*Present address: Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, UK.

†Present address: Department of Physics and Astronomy, University of Glasgow, Glasgow, UK.

 
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