Extremely proton rich nuclei: rotation-induced proton halos and extension of nuclear landscape beyond spin zero limit.*

Recent investigations reveal a number of physical mechanisms by which it is 

possible to extend the nuclear landscape beyond spin zero limit. One of these

is related to so-called  birth of particle-bound rotational bands in neutron-rich 

nuclei which has been first suggested in Ref. [1]. In this mechanism, strong

Coriolis interaction acting on high-$j$ orbitals transforms particle-unbound

(resonance) nucleonic configurations into particle-bound ones with increasing

angular momentum.  A similar mechanism is active also in the nuclei in the 

vicinity of proton drip line [2] but it is modified the presence of  the Coulomb 

barrier. As a result, particle-unbound part of the band will have discrete 

rotational states which can decay by proton emission. 

A systematic investigation of this phenomenon has been performed in proton rich even-even 

$Z=4-36$ nuclei within the framework of cranked relativistic mean field theory with the 

goals to find the general features of this phenomenon and the best candidates 

for experimental observations [3]. One of interesting predictions is a new phenomenon

of rotation-induced proton halos which is active in some nucleonic configurations.