Investigation of the D(He-3, p)He-4 reaction on ZrD targets in the energy region of 16-34 keV

摘要

The article is devoted to study of the D(He-3, p)He-4 reaction in the He-3(+) ion energy range E-He = 16 divided by 34 keV (E = 6.41 divided by 13.61 keV in the center-of-mass system) with a step of 2 keV. The goal of this paper was to determine experimentally the electron screening potential U-e and the enhancement factor of the D(He-3, p)He-4 reaction using the deuterated metal targets ZrD with different crystal textures. In this work we present results of measuring the D(He-3, p)He-4 reaction enhancement factor using the targets ZrD with Miller indices [111] and [100]. The ZrD targets was deposited on the stainless steel foil 50 mu m thick. The protons of energy 14.7 MeV from the D(He-3, p)He-4 reaction were detected by a scintillation detector based on the BC-404 scintillator 115 mm in diameter and 4 mm thick, which was placed in optical contact with the XP-2040 PMT. The measured enhancement factors of the D(He-3, p)He-4 reaction much higher than for gas targets and energy behavior is not described by the classical exponential formula. The effect of the crystal structure of the targets is evident. The measured enhancement factors of the D(He-3, p)He-4 reaction are higher for the ZrD target with a crystal structure characterized by the Miller index [100] than for the target with index [111], which probably indicates the contribution of channeling. A non-proportional increase of the enhancement factors for the D(He-3, p)He-4 reaction in energy range 16 divided by 22 keV probably indicates a low-lying resonance effect in Li-5. (C) 2019 Elsevier B.V. All rights reserved.