Core excitations across the neutron shell gap in 207Tl

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

doi:10.1016/j.physletb.2015.04.055

Core excitations across the neutron shell gap in ²⁰⁷Tl

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	88-92
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	747
DOIs	https://doi.org/10.1016/j.physletb.2015.04.055
Publication status	Published - 30 Jul 2015

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Wilson, E., Podolyák, Z., 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., ... Walker, P. M. (2015). Core excitations across the neutron shell gap in ²⁰⁷Tl. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 747, 88-92. https://doi.org/10.1016/j.physletb.2015.04.055

@article{628058319f1649a2b46ce22f271316a5,

title = "Core excitations across the neutron shell gap in 207Tl",

abstract = "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.",

author = "E. Wilson and Zs Podoly{\'a}k and H. Grawe and Brown, {B. A.} and Chiara, {C. J.} and S. Zhu and B. Fornal and Janssens, {R. V.F.} and Shand, {C. M.} and M. Bowry and M. Bunce and Carpenter, {M. P.} and N. Cieplicka-Ory{\'n}czak and Deo, {A. Y.} and Dracoulis, {G. D.} and Hoffman, {C. R.} and Kempley, {R. S.} and Kondev, {F. G.} and Lane, {G. J.} and T. Lauritsen and G. Lotay and Reed, {M. W.} and Regan, {P. H.} and {Rodr{\'i}guez Triguero}, C. and D. Seweryniak and B. Szpak and Walker, {P. M.}",

note = "Publisher Copyright: {\textcopyright} 2015 The Authors.",

year = "2015",

month = jul,

day = "30",

doi = "10.1016/j.physletb.2015.04.055",

language = "English",

volume = "747",

pages = "88--92",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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Wilson, E, Podolyák, Z, Grawe, H, Brown, BA, Chiara, CJ, Zhu, S, Fornal, B, Janssens, RVF, Shand, CM, Bowry, M, Bunce, M, Carpenter, MP, Cieplicka-Oryńczak, N, Deo, AY, Dracoulis, GD, Hoffman, CR, Kempley, RS, Kondev, FG, Lane, GJ, Lauritsen, T, Lotay, G, Reed, MW, Regan, PH, Rodríguez Triguero, C, Seweryniak, D, Szpak, B & Walker, PM 2015, 'Core excitations across the neutron shell gap in ²⁰⁷Tl', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 747, pp. 88-92. https://doi.org/10.1016/j.physletb.2015.04.055

TY - JOUR

T1 - Core excitations across the neutron shell gap in 207Tl

AU - Wilson, E.

AU - Podolyák, Zs

AU - Grawe, H.

AU - Brown, B. A.

AU - Chiara, C. J.

AU - Zhu, S.

AU - Fornal, B.

AU - Janssens, R. V.F.

AU - Shand, C. M.

AU - Bowry, M.

AU - Bunce, M.

AU - Carpenter, M. P.

AU - Cieplicka-Oryńczak, N.

AU - Deo, A. Y.

AU - Dracoulis, G. D.

AU - Hoffman, C. R.

AU - Kempley, R. S.

AU - Kondev, F. G.

AU - Lane, G. J.

AU - Lauritsen, T.

AU - Lotay, G.

AU - Reed, M. W.

AU - Regan, P. H.

AU - Rodríguez Triguero, C.

AU - Seweryniak, D.

AU - Szpak, B.

AU - Walker, P. M.

PY - 2015/7/30

Y1 - 2015/7/30

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84930631133&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2015.04.055

DO - 10.1016/j.physletb.2015.04.055

M3 - Article

SN - 0370-2693

VL - 747

SP - 88

EP - 92

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Core excitations across the neutron shell gap in ²⁰⁷Tl

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