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Effect of pd and dd reactions enhancement in deuterides TiD2, ZrD2 and Ta2D in the astrophysical energy range

Abstract

Investigation of the pd-and dd-reactions in the ultralow energy (~keV) range is of great interest in the aspect of nuclear physics and astrophysics for developing of correct models of burning and evolution of stars. This report presents compendium of experimental results obtained at the pulsed plasma Hall accelerator (TPU, Tomsk). Most of those results are new, such as

• temperature dependence of the neutron yield in the D(d, n)3He reaction in the ZrD2, Ta2D, TiD2

• potentials of electron screening and respective dependence of astrophysical S-factors in the dd-reaction for the deuteron collision energy in the range of 3–6 keV, with ZrD2, Ta2D temperature in the range of 20–200°C [1]

• characteristics of the reaction d(p, γ)3He in the ultralow collision proton-deuterons energy range of 4-13 keV [2, 3] in ZrD2, Ta2D and TiD2

• observation of the neutron yield enhancement in the reaction D(d, n)3He at the ultralow deuteron collision energy due to channeling of deuterons in microscopic TiD2 with a face-centered cubic lattice type TiD1.73, oriented in the [100] direction [4].

The report includes discussion and comparison of the collected experimental results with the global data and calculations.

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Bystritskii, V.M., Dudkin, G.N., Filipowicz, M. et al. Effect of pd and dd reactions enhancement in deuterides TiD2, ZrD2 and Ta2D in the astrophysical energy range. Phys. Part. Nuclei Lett. 13, 79–97 (2016). https://doi.org/10.1134/S1547477116010064

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Keywords

  • Nucleus Letter
  • Reaction Cross Section
  • Neutron Yield
  • Gamma Quantum
  • Electron Screening