Measurement of astrophysical S-factors and electron screening potentials for reaction in ZrD2, TiD2 and TaD0.5 targets in the ultralow energy region using plasma accelerator

First experimental evidence of D(p, γ)3He reaction in titanium deuteride in ultralow collision energy region

“…The obtained results of the studied reactions (1a) (1b) in the last decade [1][2][3][4][5][6][7][8][9][10], show the existence of an enhancement effect in the reaction of dd synthesis in deuteride metals, resulting from the presence of elec tron screening of deuterium nuclei. To verify the exist ence of this effect we have conducted experiments with beams of deuterons accelerated by a pulse Hall accelerator and using targets with deuterides of tita nium, zirconium and tantalum [8][9][10].…”

“…EXPERIMENTAL METHOD Experimental determination of the astrophysical S factor and the enhancement factor for the pd reac tion in the region of astrophysical energies is based on the 5.5 MeV yield measurement gamma quanta in the reactions (2a), (2b) and the use of parameterized dependence of the cross section in the reactions on the proton deuteron collision energy [9,10,15,20,21]:…”

“…This way, the values of U e have been found and are pre sented in Table 2. Figure 4 shows the values of the enhancement factor for the pd reaction on the function of E col aver age collision in the range of 9-19 keV proton energy, which have been calculated according to (10). The solid line shows the result of an approximation of the measured value of (E) function having the follow ing form: (18) where (E)-the function describing the measured dependence of the gamma quanta yield from the reac tion (2a) on the E col proton-deuteron collision energy.…”

“…In the recent time, there has been an increase in the interest in the study of the mechanism of reaction between light nuclei (pd, dd) in metals saturated by hydrogen isotopes in the range of ultralow energies [1][2][3][4][5][6][7][8][9][10].…”

“…To verify the exist ence of this effect we have conducted experiments with beams of deuterons accelerated by a pulse Hall accelerator and using targets with deuterides of tita nium, zirconium and tantalum [8][9][10]. As a result, the electron screening potential of deuterons interacting in the deuterides has been obtained.…”