“…The measurement of nuclear reaction cross-section for 19,20,22 C [27, 28] shows that the drip-line nucleus 22 C has a halo. The one and two neutron removal cross sections and momentum distribution also support the halo behavior of 22 C. The 22 C has N = 16 which is a new magic number in neutron-rich nuclei [20,29] and forms a Borromean halo structure ( 21 C is unstable).The direct time of flight mass measurement technique suggest 19 B, 22 C, 29 F and 34 Na are as Borromean dripline nuclei [30]. Another interesting phenomenon has been found in these days is the bubble structure of some nuclei like 22 O, 23 F, 34 Si, 36 S, 36 Ar, 46 Ar, 84 Se, 134 Ce, 174 Yb, 200 Hg etc.…”