A new formula to obtain shell correction to separation energy is derived from a Strutinsky type calculation. A systematic analysis of shell and deformation effects on nucleon separation energy is made. Spin induced structural changes are also evident in shape changes along the spin coordinate. Calculations are performed for a wide range of nuclei from Zr to Cm. The results are generally in very good agreement with experimental analysis.
The paper is devoted to the \bar{K}NNNK‾NNN
system, consisting of an antikaon and three nucleons. Four-body
Faddeev-type AGS equations are being solved in order to find possible
quasi-bound state in the system.