Speaker
Dr
Feodor Karpeshin
(GSI)
Description
The effect of the electron screening on the alpha decay rate of typical nuclei is considered. To this end, the adiabatical approach is exploited, which consecutively takes into account the adiabaticity of the motion of the alpha particle through the shells [1]. The effect is found to be of the order of one tenth to one hundredth of a percent for the considered representative nuclei. The method can be applied to description of nuclear reactions of synthesis, which take place in stellar plasma or at laboratory. The effect is expected to be much stronger in the nuclear reactions at small energies, ~ 30 keV and lower.
TABLE I. Results for the relative change in half-periods in bare nuclides (last column).
Nuclide Q (MeV) T1/2 Y (%)
144Nd 1.905 2.29 × 1015 yr 0.24
214Rn 9.208 0.27 μs 0.02
226Ra 4.871 1600 yr 0.23
252Cf 6.217 2.645 yr 0.28
241Es 8.320 9 s 0.12
294118 11.81 0.89 ms 0.27
[1] F. F. Karpeshin, Phys. Rev. 2013, C87, 054319.
Primary author
Dr
Feodor Karpeshin
(GSI)
