Author/Authors :
P.G Thirolf، نويسنده , , B.V Pritychenko، نويسنده , , B.A. Brown، نويسنده , , P.D. Cottle، نويسنده , , M Chromik، نويسنده , , T Glasmacher، نويسنده , , G Hackman، نويسنده , , R.W. Ibbotson، نويسنده , , K.W. Kemper، نويسنده , , T Otsuka، نويسنده , , L.A. Riley، نويسنده , , H. Scheit، نويسنده ,
Abstract :
The energy and electromagnetic matrix element B(E2↑) for the 21+ state in 22O have been determined via inelastic scattering of a beam of these radioactive nuclei from a 197Au target. These results provide strong evidence for the existence of the N=14 subshell closure in 22O. This demonstrates that the shell structure in 22O is similar to that of stable oxygen isotopes, even though this nucleus is only two neutrons away from the neutron drip line. These results are reproduced in the standard sd shell model as well as with a an expanded space which also includes the f7/2 and p3/2 orbitals.
