Author/Authors :
D. Steppenbeck، نويسنده , , A.N. Deacon، نويسنده , , S.J. Freeman، نويسنده , , R.V.F. Janssens، نويسنده , , M.P. Carpenter، نويسنده , , C.R. Hoffman، نويسنده , , B.P. Kay، نويسنده , , T. Lauritsen، نويسنده , , C.J. Lister، نويسنده , , D. OʹDonnell، نويسنده , , J. Ollier، نويسنده , , D. Seweryniak، نويسنده , , Anthony JF Smith، نويسنده , , K.-M. Spohr، نويسنده , , S.L. Tabor، نويسنده , , V. Tripathi، نويسنده , , P.T. Wady، نويسنده , , S. Zhu، نويسنده ,
Abstract :
Yrast and near-yrast states in 30Al and 30Si have been populated to high spin with the image fusion–evaporation reaction in inverse kinematics. The level schemes for these two isobars have been extended up to image at 9.4 and 15.5 MeV, respectively. Their decay schemes indicate that cross-shell excitations dominate at high spin, where negative-parity structures exist. Positive-parity states are compared to the results of shell-model calculations using the USD, USDA, and USDB effective interactions. The negative-parity levels are compared to predictions of the WBP interaction and the recently-developed WBP-a Hamiltonian, by allowing 1p–1h excitations to fp-shell orbitals. The results suggest that single-neutron excitations to the image orbital play a significant role at high spin.
Keywords :
??-coin , ?(?)?(?) , DCO ratios using the Gammasphere array and Fragment Mass Analyzer , 30Al , Levels , 30Si , NUCLEAR REACTIONS , ? , J , 14C(18O , multipolarities , ?X) , Comparison with shell-model calculations , I?I? , E?E? , measured , (residue)?- , deduced , E=37 MeVE=37 MeV
