Possible cluster preformation in the 14C decay of 223Ra.

摘要: A recent experiment on the $^{14}\mathrm{C}$ fine structure has shown that branching ratio to $^{209}\mathrm{Pb}$ ground state is quite different from one predicted by various models of cluster emission. Assuming preformed in $^{223}\mathrm{Ra}$ nucleus, we have calculated hindrance factor ${\mathit{F}}^{14}$C three branches states with a barrier penetrability approximated square-well Coulomb potential. The ${\mathit{F}}^{14}$C=3.9 and 4.6 values found for transitions two excited at 779 keV (${\mathit{I}}^{\mathrm{\ensuremath{\pi}}}$=11/${2}^{+}$) 1423 (${\mathit{I}}^{\mathrm{\ensuremath{\pi}}}$=15/${2}^{\mathrm{\ensuremath{-}}}$), respectively, reveal formation amplitudes both are close those $^{222}\mathrm{Ra}$ $^{224}\mathrm{Ra}$ decays. Such could be result \ensuremath{\Vert}nlj〉 shell-model components common wave functions octupole deformed nucleus first spherical nucleus. high ${\mathit{F}}^{14}$C=583 branch (${\mathit{I}}^{\mathrm{\ensuremath{\pi}}}$=9/${2}^{+}$) absence \ensuremath{\Vert}1${\mathit{g}}_{9/2}$〉 component function.