Scientific Results

Intense gamma-ray source in the giant-dipole-resonance range driven by 10-TW laser pulses

Year: 2008

Authors: Giulietti A., Bourgeois N., Ceccotti T., Davoine X., Dobosz S., D’Oliveira P., Galimberti M., Galy J., Gamucci A., Giulietti D., Gizzi LA., Hamilton D.J., Lefebvre E., Labate L., Marques J.R., Monot P., Popescu H., Reau F., Sarri G., Tomassini P., Martin P.

Autors Affiliation: CNR, Intense Laser Irradiat Lab, IPCF, I-56100 Pisa, Italy;
Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy;
Ecole Polytech, CNRS, Lab Utilisat Lasers Intenses, UMR 7605, F-91128 Palaiseau, France;
CEA, DSM DRECAM SPAM, Gif Sur Yvette, France;
CEA, Dept Phys Theor & Appl, DIF, F-91680 Bruyeres Le Chatel, France;
Commiss European Communities, Joint Res Ctr, Inst Transuranium Elements, D-7500 Karlsruhe, Germany;
Univ Pisa, Dipartimento Fis, Pisa, Italy;
Ist Nazl Fis Nucl, Sez Milano, Milan, Italy

Abstract: 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. Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 101 (10)      Pages from: 105002  to: 105002

More Information: We thank the staff of the SLIC facility for their invaluable support during the experiment. We also thank T. Levato for contributing to the experimental setup. We are indebted to the Head of the Radioprotection Department at LNF/INFN (Frascati, Italy), A. Esposito for useful information, and to the team of the Medical Physics Department (headed by M. Lazzeri) at the Pisa (Italy) Regional Hospital for discussions on the Hospital Linac performances. The Italian team was partially supported by INFN-Pisa (project PlasmonX). Some of the authors (M. G., L. L., G. S.) acknowledge financial support by the Italian Ministry of University and Research (project BLISS). Financial support by the Access to Research Infrastructures activity of the EU (Contract No. RII3-CT-2003-506350, Laserlab Europe) is gratefully acknowledged.
DOI: 10.1103/PhysRevLett.101.105002

Citations: 85
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