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Optimization of the Yield of Low-Threshold Nuclear Reactions under Action of Protons Accelerated Using Terawatt Femtosecond Laser

  • EFFECT OF LASER RADIATION ON MATTER. LASER PLASMA
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Abstract

The paper consider the possibility to execute nuclear reactions nuclear reactions with low energy threshold by means of terawatt femtosecond laser systems, exemplified by the 11B(p, α)2α and 7Li(p, n)7Be reactions used for neutronless thermonuclear synthesis and production of neutron beams. On the basis of the literature data on the dependences of the average energy and cutoff energy in the spectrum of laser-accelerated protons on the intensity of laser radiation and laser pulse energy, the estimate of the anticipated number of registered events depending on the laser without emission intensity is obtained in the intensity range achievable for compact tabletop laser systems of terawatt power level. It is shown that the optimal intensities for observing the considered reactions lie in the range (1–5) × 1019 W/cm2, whereas the total number of secondary particles per 1 TW of peak power can reach 106 and 108 for the 11B(p, α)2α and 7Li(p, n)7Be reactions, respectively.

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Funding

The work is supported by the Ministry of Science and Higher Education of the Russian Federation (agreement no. 075-15-2021-1361) and within the research program of the National Center of Physics and Mathematics (project no. 4.2).

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Authors and Affiliations

  1. Lomonosov Moscow State University, 119991, Moscow, Russia

    V. M. Skibina & A. B. Savel’ev

  2. Lebedev Physical Institute, Russian Academy of Sciences, 119991, Moscow, Russia

    A. B. Savel’ev

Authors
  1. V. M. Skibina
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  2. A. B. Savel’ev
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Correspondence to V. M. Skibina.

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Translated by E. Oborin

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Skibina, V.M., Savel’ev, A.B. Optimization of the Yield of Low-Threshold Nuclear Reactions under Action of Protons Accelerated Using Terawatt Femtosecond Laser. Bull. Lebedev Phys. Inst. 50 (Suppl 2), S194–S203 (2023). https://doi.org/10.3103/S1068335623140142

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  • DOI: https://doi.org/10.3103/S1068335623140142

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