First direct search for $2\epsilon$ and $\epsilon {\beta }^{+}$ decay of ${}^{144}$Sm and $2{\beta }^{-}$ decay of ${}^{154}$Sm

P. Belli, R. Bernabei, R. S. Boiko +12

The first direct search for the double electron capture ($2\epsilon$) and the electron capture with positron emission ($\epsilon {\beta }^{+}$) in ${}^{144}$Sm to the ground state and to the excited levels…