This work is devoted to measuring of the values of the astrophysical S-factors and electron screening potential energy for a d(d,n)3He reaction occurring at ultralow energies in zirconium deuteride ZrD2 (3.5-7.0 keV) and heavy water D2O (2.2-6.0 keV). The experiment was performed on the Hall pulsed plasma accelerator at the TPU Nuclear Physics Institute (Tomsk) with ZrD2 and D2O targets produced by the magnetron sputtering of zirconium in a deuterium environment and heavy water freezing-out on a copper support, respectively. A Χ analysis of the dependence of the neutron yields and astrophysical S-factors for the dd reaction on the deuteron collision energy E revealed that the upper bounds of the electron screening potential energy for interacting deuterons in ZrD2 and D2O and of the astrophysical S-factors at the deuteron collision energy E = 0 were Ue(ZrD2) < 30 eV, U e(D2O) < 25 eV, S(0) = (57.2 ± 3.9) keV • b (ZrD2), S(0) = (58.6 ± 3.6) keV • b (D2O) at the 90% confidence level.
|Number of pages||5|
|Journal||Bulletin of the Russian Academy of Sciences: Physics|
|Publication status||Published - 1 Nov 2010|
ASJC Scopus subject areas
- Physics and Astronomy(all)