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Particle characterisation for the evaluation of 181mTa excitation yield in millijoule laser induced plasmas

Abstract : The particles (ions, atoms, x-rays and high-energy electrons) resulting from the interaction of a high repetition rate laser with a tantalum target are characterized at laser intensities ranging between 3 × 1015 and 6 × 1016 W cm-2 using plasma and nuclear physics techniques. A simple model is developed to estimate, from these data, the ^181 Ta isomeric state excitation yields in the ablated matter and in the remaining target. Both nuclear photoexcitation and electron inelastic scattering processes have been taken into account in the calculations. A maximum of a few 10-3 excitations per laser shot are predicted in the investigated intensity range.
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http://hal.in2p3.fr/in2p3-00319282
Contributor : Ludovic Le Noan <>
Submitted on : Monday, September 8, 2008 - 9:52:46 AM
Last modification on : Monday, February 10, 2020 - 6:12:40 PM

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F. Gobet, F. Hannachi, M.M. Aléonard, M. Gerbaux, G. Malka, et al.. Particle characterisation for the evaluation of 181mTa excitation yield in millijoule laser induced plasmas. Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 2008, 41, pp.145701. ⟨10.1088/0953-4075/41/14/145701⟩. ⟨in2p3-00319282⟩

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