Core-excited states and core-polarization effects in 210At and 211At

S. Bayer; A. P. Byrne; G. D. Dracoulis; A. M. Baxter; T. Kibédi; F. G. Kondev

doi:10.1016/S0375-9474(01)00922-8

Core-excited states and core-polarization effects in ²¹⁰At and ²¹¹At

S. Bayer^*, A. P. Byrne, G. D. Dracoulis, A. M. Baxter, T. Kibédi, F. G. Kondev

^*Corresponding author for this work

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

26 Citations (Scopus)

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[h_9/2²i_13/2] 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.

Original language	English
Pages (from-to)	3-62
Number of pages	60
Journal	Nuclear Physics A
Volume	694
Issue number	1-2
DOIs	https://doi.org/10.1016/S0375-9474(01)00922-8
Publication status	Published - 5 Nov 2001

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title = "Core-excited states and core-polarization effects in 210At and 211At",

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 = "At and At deduced levels, J , τ , reduced transition probabilities, Measured γγ(t) , Xγ(t) , E, Pb (Li, x n), E=32 -44, 53-56 MeV",

author = "S. Bayer and Byrne, {A. P.} and Dracoulis, {G. D.} and Baxter, {A. M.} and T. Kib{\'e}di and Kondev, {F. G.}",

year = "2001",

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doi = "10.1016/S0375-9474(01)00922-8",

language = "English",

volume = "694",

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TY - JOUR

T1 - Core-excited states and core-polarization effects in 210At and 211At

AU - Bayer, S.

AU - Byrne, A. P.

AU - Dracoulis, G. D.

AU - Baxter, A. M.

AU - Kibédi, T.

AU - Kondev, F. G.

PY - 2001/11/5

Y1 - 2001/11/5

N2 - 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.

AB - 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.

KW - At and At deduced levels, J , τ , reduced transition probabilities

KW - Measured γγ(t) , Xγ(t) , E

KW - Pb (Li, x n), E=32 -44, 53-56 MeV

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U2 - 10.1016/S0375-9474(01)00922-8

DO - 10.1016/S0375-9474(01)00922-8

M3 - Article

SN - 0375-9474

VL - 694

SP - 3

EP - 62

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 1-2

ER -

Core-excited states and core-polarization effects in ²¹⁰At and ²¹¹At

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