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Journal of Applied Physics / Volume 96 / Issue 11 / INTERDISCIPLINARY AND GENERAL PHYSICS (PACS 1-41, 43-47, 79, 81-84, 89-99)

J. Appl. Phys. 96, 6912 (2004); http://dx.doi.org/10.1063/1.1814421 (7 pages)

Neutron production by fast protons from ultraintense laser-plasma interactions

J. M. Yang1, P. McKenna1, K. W. D. Ledingham2, T. McCanny1, L. Robson2, S. Shimizu1, R. P. Singhal3, M. S. Wei4, K. Krushelnick4, R. J. Clarke5, D. Neely5, and P. A. Norreys5

1Department of Physics, University of Strathclyde, Glasgow, G4 0NG, United Kingdom
2Department of Physics, University of Strathclyde, Glasgow, G4 0NG, United Kingdom and Atomic Weapons Establishment plc Aldermaston, Reading RG7 4PR, United Kingdom
3Department of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
4Blackett Laboratory, Imperial College, London SW7 2BZ, United Kingdom
5Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom

(Received 1 June 2004; accepted 21 September 2004)

Tens of MeV proton beams have been generated by interactions of the VULCAN petawatt laser with foil targets and used to induce nuclear reactions in zinc and boron samples. The numbers of 11C, 66Ga, 67Ga, 68Ga, 61Cu, 62Zn, 63Zn, and 69mZn nuclei have been measured and used to determine the proton energy spectrum. It is known that (p,n) reactions provide an important method for producing neutron sources and in the present experiment up to ∼109 neutrons sr−1 have been generated via 11B(p,n)11C reactions. Using experimentally determined proton energy spectra, the production of neutrons via (p,n) reactions in various targets has been simulated, to quantify neutron pulse intensities and energy spectra. It has been shown that as high as 4×109 neutrons sr−1 per laser pulse can be generated via 7Li(p,n)7B reactions using the present VULCAN petawatt laser-pulse conditions.

© 2004 American Institute of Physics

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KEYWORDS and PACS

Keywords

copper, gallium, zinc, boron, foils, laser beam effects, proton spectra, neutron spectra, proton effects, neutron effects, protons, neutrons

PACS

  • 61.80.Ba

    Ultraviolet, visible, and infrared radiation effects (including laser radiation)

  • 61.80.Jh

    Ion radiation effects

  • 61.80.Hg

    Neutron radiation effects

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.1814421

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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