  A systematic study on the probability for the emission of 4^He and 14^C
cluster from hyper ${207-234}^$Ac and non-strange normal ${207-234}^$Ac nuclei
are performed for the first time using our fission model, the Coulomb and
proximity potential model (CPPM). The predicted half lives show that hyper
${207-234}^$Ac nuclei are unstable against 4^He emission and 14^C emission from
hyper ${217-228}^$Ac are favorable for measurement. Our study also show that
hyper ${207-234}^$Ac are stable against hyper 4^He and 14^C emission. The role
of neutron shell closure (N=126) in hyper 214^Fr daughter and role of proton/
neutron shell closure (Z =82, N =126) in hyper 210^Bi daughter are also
revealed. As hyper-nuclei decays to normal nuclei by mesonic/non-mesonic decay
and since most of the predicted half lives for 4^He and 14^C emission from
normal Ac nuclei are favourable for measurement, we presume that alpha and 14^C
cluster emission from hyper Ac nuclei can be detected in laboratory in a
cascade (two-step) process.

Nuclear Theory