Improved Value for the Energy Splitting of the Ground-State Doublet in the Nucleus 229Th

We have made an improved estimate of the 229mTh isomer energy. The new value 7.8(5) eV includes an estimate of spectral contamination due to the out-of-band E2 transition from the 42.43-keV 7/2+ member of the [633] ground state band to the 3/2+ [631] 229mTh bandhead. We estimate a 2% branching ratio...

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Detalles Bibliográficos
Autores principales: Beck, B R, Becker, J A, Beiersdorfer,1 P, Brown, G V, Moody, J K, Wu, C Y, Wilhelmy, J B, Porter, F S, Kilbourne, C A, Kelley, R L
Lenguaje:eng
Publicado: 2010
Materias:
XX
Acceso en línea:http://cds.cern.ch/record/1237922
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author Beck, B R
Becker, J A
Beiersdorfer,1 P
Brown, G V
Moody, J K
Wu, C Y
Wilhelmy, J B
Porter, F S
Kilbourne, C A
Kelley, R L
author_facet Beck, B R
Becker, J A
Beiersdorfer,1 P
Brown, G V
Moody, J K
Wu, C Y
Wilhelmy, J B
Porter, F S
Kilbourne, C A
Kelley, R L
author_sort Beck, B R
collection CERN
description We have made an improved estimate of the 229mTh isomer energy. The new value 7.8(5) eV includes an estimate of spectral contamination due to the out-of-band E2 transition from the 42.43-keV 7/2+ member of the [633] ground state band to the 3/2+ [631] 229mTh bandhead. We estimate a 2% branching ratio for this unobserved transition in the 42.43-keV 7/2+ [633] deexcitation. The excitation of the 229mTh level is increased from the previously reported value of 7.6(5) eV to the new value of 7.8(5) eV when this branch is included in the analysis.
id cern-1237922
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2010
record_format invenio
spelling cern-12379222019-09-30T06:29:59Zhttp://cds.cern.ch/record/1237922engBeck, B RBecker, J ABeiersdorfer,1 PBrown, G VMoody, J KWu, C YWilhelmy, J BPorter, F SKilbourne, C AKelley, R LImproved Value for the Energy Splitting of the Ground-State Doublet in the Nucleus 229ThXXWe have made an improved estimate of the 229mTh isomer energy. The new value 7.8(5) eV includes an estimate of spectral contamination due to the out-of-band E2 transition from the 42.43-keV 7/2+ member of the [633] ground state band to the 3/2+ [631] 229mTh bandhead. We estimate a 2% branching ratio for this unobserved transition in the 42.43-keV 7/2+ [633] deexcitation. The excitation of the 229mTh level is increased from the previously reported value of 7.6(5) eV to the new value of 7.8(5) eV when this branch is included in the analysis.oai:cds.cern.ch:12379222010
spellingShingle XX
Beck, B R
Becker, J A
Beiersdorfer,1 P
Brown, G V
Moody, J K
Wu, C Y
Wilhelmy, J B
Porter, F S
Kilbourne, C A
Kelley, R L
Improved Value for the Energy Splitting of the Ground-State Doublet in the Nucleus 229Th
title Improved Value for the Energy Splitting of the Ground-State Doublet in the Nucleus 229Th
title_full Improved Value for the Energy Splitting of the Ground-State Doublet in the Nucleus 229Th
title_fullStr Improved Value for the Energy Splitting of the Ground-State Doublet in the Nucleus 229Th
title_full_unstemmed Improved Value for the Energy Splitting of the Ground-State Doublet in the Nucleus 229Th
title_short Improved Value for the Energy Splitting of the Ground-State Doublet in the Nucleus 229Th
title_sort improved value for the energy splitting of the ground-state doublet in the nucleus 229th
topic XX
url http://cds.cern.ch/record/1237922
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AT beckerja improvedvaluefortheenergysplittingofthegroundstatedoubletinthenucleus229th
AT beiersdorfer1p improvedvaluefortheenergysplittingofthegroundstatedoubletinthenucleus229th
AT browngv improvedvaluefortheenergysplittingofthegroundstatedoubletinthenucleus229th
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