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Journal Articles Physical Review C Year : 2006

New measurement of neutron capture resonances in 209Bi

C. Domingo-Pardo , U. Abbondanno , G. Aerts (1) , H. Alvarez-Pol , F. Alvarez-Velarde , S. Andriamonje (1) , J. Andrzejewski , P. Assimakopoulos , L. Audouin , G. Badurek , P. Baumann (2) , F. Becvar , E. Berthoumieux (1) , F. Calvino , D. Cano-Ott , R. Capote , A.C. de Albornoz , P. Cennini (3) , V. Chepel , E. Chiaveri (3) , N. Colonna , G. Cortes , A. Couture , J. Cox , M. Dahlfors (3) , S. David (4) , I. Dillman , R. Dolfini , W. Dridi (1) , I. Duran , C. Eleftheriadis , M. Embid-Segura , L. Ferrant (4) , Anthony Ferrari (3) , R. Ferreira-Marques , L. Fitzpatrick (3) , H. Frais-Koelbl , K. Fujii , W. Furman , R. Gallino , I. Goncalves , E. Gonzalez-Romero , A. Goverdovski , F. Gramegna , E. Griesmayer , C. Guerrero , F. Gunsing (1) , B. Haas (5) , R. Haight , M. Heil , A. Herrera-Martinez (3) , M. Igashira , S. Isaev (4) , E. Jericha , Y. Kadi (3) , F. Kappeler , D. Karamanis , D. Karadimos , M. Kerveno (2) , V. Ketlerov (3) , P. Koehler , V. Konovalov (3) , E. Kossionides , M. Krticka , C. Lamboudis , H. Leeb , A. Lindote , I. Lopes , M. Lozano , S. Lukic (2) , J. Marganiec , L. Marques , S. Marrone , P. Mastinu , A. Mengoni (3) , P.M. Milazzo , C. Moreau , M. Mosconi , F. Neves , H. Oberhummer , M. Oshima , S. O'Brien , J. Pancin (1) , C. Papachristodoulou , C. Papadopoulos , C. Paradela , N. Patronis , A. Pavlik , P. Pavlopoulos (6) , L. Perrot (1) , R. Plag , A. Plompen , A. Plukis (1) , A. Poch , C. Pretel , J. Quesada , T. Rauscher , R. Reifarth , M. Rosetti , C. Rubbia , G. Rudolf (2) , P. Rullhusen , J. Salgado , L. Sarchiapone (3) , I. Savvidis , C. Stephan (4) , G. Tagliente , J.L. Tain , L. Tassan-Got (4) , L. Tavora , R. Terlizzi , G. Vannini , P. Vaz , A. Ventura , D. Villamarin , M.C. Vincente , V. Vlachoudis , R. Vlastou , F. Voss , S. Walter , H. Wendler (3) , M. Wiescher , K. Wisshak
C. Domingo-Pardo
  • Function : Author
U. Abbondanno
  • Function : Author
H. Alvarez-Pol
  • Function : Author
F. Alvarez-Velarde
  • Function : Author
J. Andrzejewski
  • Function : Author
P. Assimakopoulos
  • Function : Author
L. Audouin
  • Function : Author
G. Badurek
  • Function : Author
F. Becvar
  • Function : Author
F. Calvino
  • Function : Author
D. Cano-Ott
  • Function : Author
R. Capote
  • Function : Author
A.C. de Albornoz
  • Function : Author
V. Chepel
  • Function : Author
N. Colonna
  • Function : Author
G. Cortes
  • Function : Author
A. Couture
  • Function : Author
J. Cox
  • Function : Author
S. David
I. Dillman
  • Function : Author
R. Dolfini
  • Function : Author
I. Duran
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C. Eleftheriadis
  • Function : Author
M. Embid-Segura
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R. Ferreira-Marques
  • Function : Author
H. Frais-Koelbl
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K. Fujii
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W. Furman
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R. Gallino
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I. Goncalves
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E. Gonzalez-Romero
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A. Goverdovski
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F. Gramegna
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E. Griesmayer
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C. Guerrero
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R. Haight
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M. Heil
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M. Igashira
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E. Jericha
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F. Kappeler
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D. Karamanis
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D. Karadimos
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M. Kerveno
P. Koehler
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E. Kossionides
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M. Krticka
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C. Lamboudis
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H. Leeb
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A. Lindote
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I. Lopes
M. Lozano
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J. Marganiec
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L. Marques
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S. Marrone
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P. Mastinu
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P.M. Milazzo
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C. Moreau
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M. Mosconi
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F. Neves
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H. Oberhummer
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M. Oshima
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S. O'Brien
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C. Papachristodoulou
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C. Papadopoulos
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C. Paradela
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N. Patronis
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A. Pavlik
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R. Plag
  • Function : Author
A. Plompen
  • Function : Author
A. Poch
  • Function : Author
C. Pretel
  • Function : Author
J. Quesada
  • Function : Author
T. Rauscher
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R. Reifarth
  • Function : Author
M. Rosetti
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C. Rubbia
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P. Rullhusen
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J. Salgado
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I. Savvidis
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G. Tagliente
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J.L. Tain
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L. Tavora
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R. Terlizzi
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G. Vannini
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P. Vaz
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A. Ventura
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D. Villamarin
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M.C. Vincente
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V. Vlachoudis
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R. Vlastou
  • Function : Author
F. Voss
  • Function : Author
S. Walter
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M. Wiescher
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K. Wisshak
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Abstract

The neutron capture cross section of Bi-209 has been measured at the CERN n_TOF facility by employing the pulse-height-weighting technique. Improvements over previous measurements are mainly because of an optimized detection system, which led to a practically negligible neutron sensitivity. Additional experimental sources of systematic error, such as the electronic threshold in the detectors, summing of gamma-rays, internal electron conversion, and the isomeric state in bismuth, have been taken into account. gamma-Ray absorption effects inside the sample have been corrected by employing a nonpolynomial weighting function. Because Bi-209 is the last stable isotope in the reaction path of the stellar s-process, the Maxwellian averaged capture cross section is important for the recycling of the reaction flow by alpha decays. In the relevant stellar range of thermal energies between kT=5 and 8 keV our new capture rate is about 16% higher than the presently accepted value used for nucleosynthesis calculations. At this low temperature an important part of the heavy Pb-Bi isotopes are supposed to be synthesized by the s-process in the He shells of low mass, thermally pulsing asymptotic giant branch stars. With the improved set of cross sections we obtain an s-process fraction of 19 +/- 3% of the solar bismuth abundance, resulting in an r-process residual of 81 +/- 3%. The present (n,gamma) cross-section measurement is also of relevance for the design of accelerator driven systems based on a liquid metal Pb/Bi spallation target

Dates and versions

in2p3-00098239 , version 1 (25-01-2007)

Identifiers

Cite

C. Domingo-Pardo, U. Abbondanno, G. Aerts, H. Alvarez-Pol, F. Alvarez-Velarde, et al.. New measurement of neutron capture resonances in 209Bi. Physical Review C, 2006, 74, pp.025807. ⟨10.1103/PhysRevC.74.025807⟩. ⟨in2p3-00098239⟩
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