Details

Autor(en) / Beteiligte

• Wilson, E.
• Podolyák, Zs
• Grawe, H.
• Brown, B.A.
• Chiara, C.J.
• Zhu, S.
• Fornal, B.
• Janssens, R.V.F.
• Shand, C.M.
• Bowry, M.
• Bunce, M.
• Carpenter, M.P.
• Cieplicka-Oryńczak, N.
• Deo, A.Y.
• Dracoulis, G.D.
• Hoffman, C.R.
• Kempley, R.S.
• Kondev, F.G.
• Lane, G.J.
• Lauritsen, T.
• Lotay, G.
• Reed, M.W.
• Regan, P.H.
• Rodríguez Triguero, C.
• Seweryniak, D.
• Szpak, B.
• Walker, P.M.

Titel

Core excitations across the neutron shell gap in 207Tl

Ist Teil von

• Physics letters. B, 2015-07, Vol.747 (C), p.88-92

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2015

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• The single closed-neutron-shell, one proton–hole nucleus 207Tl was populated in deep-inelastic collisions of a 208Pb beam with a 208Pb target. The yrast and near-yrast level scheme has been established up to high excitation energy, comprising an octupole phonon state and a large number of core excited states. Based on shell-model calculations, all observed single core excitations were established to arise from the breaking of the N=126 neutron core. While the shell-model calculations correctly predict the ordering of these states, their energies are compressed at high spins. It is concluded that this compression is an intrinsic feature of shell-model calculations using two-body matrix elements developed for the description of two-body states, and that multiple core excitations need to be considered in order to accurately calculate the energy spacings of the predominantly three-quasiparticle states.