Title of article
Core-excited states and core-polarization effects in 210At and 211At Original Research Article
Author/Authors
S. Bayer، نويسنده , , A.P. Byrne، نويسنده , , G.D. Dracoulis، نويسنده , , A.M. Baxter، نويسنده , , T. KIBEDI، نويسنده , , F.G. Kondev، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2001
Pages
60
From page
3
To page
62
Abstract
Excited states in the nuclei 210At and 211At have been studied using 208Pb(7Li,xn) reactions. Detailed spectroscopy of levels up to 30ℏ has been achieved. New isomeric levels arising from core-excited states were observed, with the highest-lying isomers attributed to a coupling of the π[h9/22i13/2] configuration to double neutron-particle–hole excitations. Clear relationships between the states observed in 210At and 211At were identified. Semiempirical shell-model calculations reproduce very well the yrast states in both nuclei. Uncertainty in the modeling of core-polarization was seen as a limiting factor in the calculation of accurate level energies for core-excited states.
Keywords
211At , 210At , 208Pb (7Li , Calculated levels , E=32–44 , B(?) , 53–56 MeV , Semiempirical shell-model calculations , Measured ??(t) , yrast configurations , X?(t) , Core-excitation , E? , residual interactions , J? , octupole coupling , ?m , core-polarization , reduced transition probabilities , 210At and 211At deduced levels , enhanced transitions , Enriched targets , Compton suppressed Ge detectors , pulsed-beam , xn) , configurations
Journal title
Nuclear physics A
Serial Year
2001
Journal title
Nuclear physics A
Record number
1195594
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