Energetic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>α</mml:mi></mml:math> -particle sources produced through proton-boron reactions by high-energy high-intensity laser beams

In an experiment performed with a high-intensity and high-energy laser system, $\ensuremath{\alpha}$-particle production in proton-boron reaction by using laser-driven proton beam was measured. $\ensuremath{\alpha}$ particles were observed from the front also rear side, even after 2-mm-thick boron target. The data obtained this have been analyzed sequence of numerical simulations. simulations clarify mechanisms transport through targets. energies simulation reach 10--20 MeV energy transfer 20--30 incident protons. Despite lower cross sections for protons above sub-MeV resonances reactions, ${10}^{8}$--${10}^{9}\phantom{\rule{4pt}{0ex}}\ensuremath{\alpha}$ per steradian detected.