Au-197(n,gamma) cross section in the resonance region

The (n,gamma) cross section of Au-197 has been measured at n_TOF in the resolved resonance region, up to 5 keV, with the aim of improving the accuracy in an energy range where it is not yet considered standard. The measurements were performed with two different experimental setup and detection techniques, the total energy method based on C6D6 detectors, and the total absorption calorimetry based on a 4 pi BaF2 array. By comparing the data collected with the two techniques, two accurate sets of neutron-capture yields have been obtained, which could be the basis for a new evaluation leading to an extended cross-section standard. Overall good agreement is found between the n_TOF results and evaluated cross sections, with some significant exceptions for small resonances. A few resonances not included in the existing databases have also been observed.

S. Marrone | Y. Kadi | A. Herrera-Martínez | R. Haight | P. Vaz | N. Colonna | R. Capote | C. Papadopoulos | M. Rosetti | D. Karamanis | M. Igashira | J. Andrzejewski | P. Cennini | C. Rubbia | C. Lampoudis | A. Lindote | S. Lukić | M. Calviani | M. Kerveno | A. Plompen | G. Rudolf | R. Reifarth | W. Furman | S. Andriamonje | C. Eleftheriadis | P. Pavlopoulos | C. Stephan | L. Tassan-got | L. Audouin | S. David | C. Domingo-Pardo | A. Couture | E. Chiaveri | V. Vlachoudis | L. Sarchiapone | E. Berthoumieux | F. Calviño | D. Cano-Ott | G. Cortes | I. Ďuran | E. González-Romero | C. Guerrero | F. Gunsing | T. Martinez | P. Mastinu | E. Mendoza | A. Mengoni | P. Milazzo | A. Pavlík | J. Praena | J. Quesada | G. Tagliente | J. Taı́n | G. Vannini | R. Vlastou | C. Massimi | A. Ventura | M. Dahlfors | C. Paradela | H. Álvarez | L. Ferrant | U. Abbondanno | K. Fujii | C. Moreau | G. Aerts | F. Álvarez-Velarde | F. Belloni | I. Goncalves | E. Jericha | M. Krtička | C. Lederer | H. Leeb | J. Marganiec | T. Rauscher | R. Plag | K. Wisshak | P. Assimakopoulos | G. Badurek | V. Chepel | J. Cox | R. Ferreira-Marques | F. Gramegna | M. Heil | P. Koehler | E. Kossionides | M. Lozano | H. Oberhummer | S. O'Brien | J. Pancin | L. Perrot | A. Plukis | A. Poch | C. Pretel | P. Rullhusen | L. Tavora | R. Terlizzi | F. Voss | M. Wiescher | P. Baumann | M. Mosconi | C. Carrapiço | W. Dridi | B. Haas | F. Kaeppeler | D. Karadimos | I. Lopes | F. Neves | I. Savvidis | D. Villamarín | S. Walter | F. Becvár | I. Dillmann | A. Ferrari | S. Galanopoulos | G. Perdikakis | M. Pigni | R. Sarmento | S. Lukic | D. Villamarı́n | M. Krticka | A. Pavlik | J. Tain | G. Cortés

[1]  Soo-Youl Oh,et al.  International Evaluation of Neutron Cross Section Standards , 2009 .

[2]  A. Ferrari,et al.  The n_TOF Total Absorption Calorimeter for neutron capture measurements at CERN , 2009 .

[3]  D. Cano-Ott,et al.  The n_TOF Total Absorption Calorimeter response to γ‐ray cascades following neutron capture in minor actinides , 2009 .

[4]  Michael Heil,et al.  Status and Outlook of the Neutron Time-of-Flight Facility n_TOF at CERN , 2007 .

[5]  E. al.,et al.  Measurement of the radiative neutron capture cross section of Pb-206 and its astrophysical implications , 2007, 0707.3679.

[6]  F. Gunsing,et al.  The Use of C6D6 Detectors for Neutron Induced Capture Cross-Section Measurements in the Resonance Region , 2007 .

[7]  D. Cano-Ott,et al.  The influence of the unknown de-excitation pattern in the analysis of β-decay total absorption spectra , 2007 .

[8]  E. al.,et al.  Measurement of the neutron capture cross section of the s-only isotope Pb-204 from 1-eV to 440-keV , 2006, nucl-ex/0610033.

[9]  S. Marrone,et al.  Pulse shape analysis of signals from BaF2 and CeF3 scintillators for neutron capture experiments , 2006 .

[10]  E. al.,et al.  Resonance capture cross section of Pb-207 , 2006, nucl-ex/0610039.

[11]  E. al.,et al.  New measurement of neutron capture resonances in Bi-209 , 2006, nucl-ex/0610040.

[12]  F. Becvar,et al.  Fast neutron capture on the Hf isotopes: cross sections, isomer production, and stellar aspects , 2006 .

[13]  Luiz C Leal,et al.  New neutron cross-section measurements at ORELA and their application in nuclear criticality calculations , 2005 .

[14]  W. Gudowski.  Nuclear waste management: Status, prospects and hopes , 2005 .

[15]  J. M. Perlado,et al.  The data acquisition system of the neutron time-of-flight facility n_TOF at CERN , 2005 .

[16]  Yacine Kadi,et al.  Time-energy relation of the n_TOF neutron beam : energy standards revisited , 2004 .

[17]  R. Haight,et al.  Background identification and suppression for the measurement of (n,γ) reactions with the DANCE array at LANSCE , 2004, 1310.1884.

[18]  Luiz C Leal,et al.  New Neutron Cross Section Measurements at ORELA for Improved Nuclear Data , 2004 .

[19]  Isabel S. Gonçalves,et al.  Measurement of the n_TOF beam profile with a micromegas detector , 2004 .

[20]  J. M. Perlado,et al.  New experimental validation of the pulse height weighting technique for capture cross-section measurements , 2004 .

[21]  S. Marrone,et al.  A low background neutron flux monitor for the n_TOF facility at CERN , 2004 .

[22]  E. Radermacher,et al.  Results from the commissioning of the n_TOF spallation neutron source at CERN , 2003 .

[23]  Measurements of (n,γ) neutron capture cross-sections with liquid scintillator detectors , 2003 .

[24]  F. Käppeler,et al.  An optimized C6D6 detector for studies of resonance-dominated (n,γ) cross-sections , 2003 .

[25]  M. M. Fowler,et al.  A detector for (n,γ) cross-section measurements at a spallation neutron source , 2001, 1310.4487.

[26]  M. Salvatores,et al.  Review and proposals about the role of accelerator driven systems nuclear power , 2001 .

[27]  F. Käppeler.  The origin of the heavy elements: The s process , 1999 .

[28]  Arthur E Champagne,et al.  Synthesis of the elements in stars: forty years of progress , 1997 .

[29]  Winters,et al.  Resonance neutron capture and transmission measurements and the stellar neutron capture cross sections of 134Ba and 136Ba. , 1996, Physical review. C, Nuclear physics.

[30]  G. Rupp,et al.  The Karlsruhe 4π barium fluoride detector , 1990 .

[31]  H. Liskien,et al.  AN EXPERIMENTAL-METHOD FOR DETERMINING THE TOTAL EFFICIENCY AND THE RESPONSE FUNCTION OF A GAMMA-RAY DETECTOR IN THE RANGE 0.5-10 MEV , 1988 .

[32]  R. Macklin.  A self-calibrated neutron capture measurement of the 1. 15-keV resonance of iron , 1987 .

[33]  R. Macklin,et al.  Absolute neutron capture yield calibration , 1979 .

[34]  R. Macklin,et al.  Gold neutron-capture cross section from 3 to 550 keV , 1975 .

[35]  R. N. Alves,et al.  Détermination du spin et des paramètres des résonances pour 197Au+n DE 1000 eV à 2100 eV , 1969 .

[36]  J. H. Gibbons,et al.  Capture-Cross-Section Studies for 30—220-keV Neutrons Using a New Technique , 1967 .

[37]  W. W. Havens,et al.  Slow Neutron Resonance Spectroscopy. II. Ag, Au, Ta , 1960 .

[38]  E. R. Rae,et al.  The analysis of neutron spectrometer resonance data , 1957 .