Capture cross section measurements of (186,187,188)Os at n_TOF: the resolved resonance region

K. Fujii; M. Mosconi; P. M. Milazzo; C. Domingo-Pardo; F. Kaeppeler; A. Mengoni; U. Abbondanno; G. Aerts; H. Alvarez; F. Alvarez-Velarde; S. Andriamonje; J. Andrzejewski; P. Assimakopoulos; L. Audouin; G. Badurek; P. Baumann; F. Becvar; E. Berthoumieux; F. Calvino; M. Calviani; D. Cano-Ott; R. Capote; C. Carrapico; P. Cennini; V. Chepel; E. Chiaveri; N. Colonna; G. Cortes; A. Couture; J. Cox; M. Dahlfors; S. David; I. Dillmann; W. Dridi; I. Duran; C. Eleftheriadis; M. Embid-Segura; L. Ferrant; A. Ferrari; R. Ferreira-Marques; W. Furman; I. Goncalves; E. Gonzalez-Romero; F. Gramegna; C. Guerrero; F. Gunsing; B. Haas; R. Haight; M. Heil; T. Rauscher; n TOF Collaboration

doi:10.1051/ndata:07519

Capture cross section measurements of (186,187,188)Os at n_TOF: the resolved resonance region

K. Fujii, M. Mosconi, P. M. Milazzo, C. Domingo-Pardo, F. Kaeppeler, A. Mengoni, U. Abbondanno, G. Aerts, H. Alvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Becvar, E. Berthoumieux, F. Calvino, M. CalvianiD. Cano-Ott, R. Capote, C. Carrapico, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marques, W. Furman, I. Goncalves, E. Gonzalez-Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, T. Rauscher, n TOF Collaboration

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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Abstract

The neutron capture cross sections of (186,187,188)Os have been measured at the CERN neutron time-of-flight facility, n_TOF, in the neutron energy range from 1 eV up to 1 MeV. In this contribution, we report the results of the analysis of the resolved resonance region (RRR). Resonance parameters have been extracted from a full R-matrix fit of the capture yields with the SAMMY code. A statistical analysis has been performed and the related average resonance parameters are derived. This information is crucial for a complete understanding and modeling in terms of the Hauser-Feshbach statistical model of the capture and inelastic reaction channels, required for the evaluation of the stellar reaction rates of these isotopes. Maxwellian average cross sections for the range of temperatures relevant for s-process nucleosynthesis have been derived from the combined information of the experimental data in the resolved and unresolved resonance regions. A brief account of the implications of this analysis in the estimation of the s-process component of the (187)Os abundance and the related impact on the estimates of the time-duration of the galactic nucleosynthesis through the Re/Os clock is given.

Original language	English
Title of host publication	Int Conf on Nuclear Data for Science and Technology
Editors	O. Bersillon, F. Gunsing, E. Bauge, R. Jacqmin, S. Leray
Place of Publication	CEDEX A
Publisher	EDP Sciences
Pages	599-602
Number of pages	4
Volume	1
ISBN (Print)	978-2-7598-0090-2
DOIs	https://doi.org/10.1051/ndata:07519
Publication status	Published - 2008
Event	International Conference on Nuclear Data for Science and Technology - Nice, France Duration: 22 Apr 2007 → 27 Apr 2007

Conference

Conference	International Conference on Nuclear Data for Science and Technology
Country/Territory	France
City	Nice
Period	22/04/07 → 27/04/07

Keywords

SYSTEM
FACILITY
NUCLEOSYNTHESIS
NEUTRON
CERN

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Fujii, K., Mosconi, M., Milazzo, P. M., Domingo-Pardo, C., Kaeppeler, F., Mengoni, A., Abbondanno, U., Aerts, G., Alvarez, H., Alvarez-Velarde, F., Andriamonje, S., Andrzejewski, J., Assimakopoulos, P., Audouin, L., Badurek, G., Baumann, P., Becvar, F., Berthoumieux, E., Calvino, F., ... n TOF Collaboration (2008). Capture cross section measurements of (186,187,188)Os at n_TOF: the resolved resonance region. In O. Bersillon, F. Gunsing, E. Bauge, R. Jacqmin, & S. Leray (Eds.), Int Conf on Nuclear Data for Science and Technology (Vol. 1, pp. 599-602). EDP Sciences. https://doi.org/10.1051/ndata:07519

@inproceedings{cc5fdfeca8c4497a9483c2895864a837,

title = "Capture cross section measurements of (186,187,188)Os at n_TOF: the resolved resonance region",

abstract = "The neutron capture cross sections of (186,187,188)Os have been measured at the CERN neutron time-of-flight facility, n_TOF, in the neutron energy range from 1 eV up to 1 MeV. In this contribution, we report the results of the analysis of the resolved resonance region (RRR). Resonance parameters have been extracted from a full R-matrix fit of the capture yields with the SAMMY code. A statistical analysis has been performed and the related average resonance parameters are derived. This information is crucial for a complete understanding and modeling in terms of the Hauser-Feshbach statistical model of the capture and inelastic reaction channels, required for the evaluation of the stellar reaction rates of these isotopes. Maxwellian average cross sections for the range of temperatures relevant for s-process nucleosynthesis have been derived from the combined information of the experimental data in the resolved and unresolved resonance regions. A brief account of the implications of this analysis in the estimation of the s-process component of the (187)Os abundance and the related impact on the estimates of the time-duration of the galactic nucleosynthesis through the Re/Os clock is given.",

keywords = "SYSTEM, FACILITY, NUCLEOSYNTHESIS, NEUTRON, CERN",

author = "K. Fujii and M. Mosconi and Milazzo, {P. M.} and C. Domingo-Pardo and F. Kaeppeler and A. Mengoni and U. Abbondanno and G. Aerts and H. Alvarez and F. Alvarez-Velarde and S. Andriamonje and J. Andrzejewski and P. Assimakopoulos and L. Audouin and G. Badurek and P. Baumann and F. Becvar and E. Berthoumieux and F. Calvino and M. Calviani and D. Cano-Ott and R. Capote and C. Carrapico and P. Cennini and V. Chepel and E. Chiaveri and N. Colonna and G. Cortes and A. Couture and J. Cox and M. Dahlfors and S. David and I. Dillmann and W. Dridi and I. Duran and C. Eleftheriadis and M. Embid-Segura and L. Ferrant and A. Ferrari and R. Ferreira-Marques and W. Furman and I. Goncalves and E. Gonzalez-Romero and F. Gramegna and C. Guerrero and F. Gunsing and B. Haas and R. Haight and M. Heil and T. Rauscher and {n TOF Collaboration}",

year = "2008",

doi = "10.1051/ndata:07519",

language = "English",

isbn = "978-2-7598-0090-2",

volume = "1",

pages = "599--602",

editor = "O. Bersillon and F. Gunsing and E. Bauge and R. Jacqmin and S. Leray",

booktitle = "Int Conf on Nuclear Data for Science and Technology",

publisher = "EDP Sciences",

address = "France",

note = "International Conference on Nuclear Data for Science and Technology ; Conference date: 22-04-2007 Through 27-04-2007",

}

Fujii, K, Mosconi, M, Milazzo, PM, Domingo-Pardo, C, Kaeppeler, F, Mengoni, A, Abbondanno, U, Aerts, G, Alvarez, H, Alvarez-Velarde, F, Andriamonje, S, Andrzejewski, J, Assimakopoulos, P, Audouin, L, Badurek, G, Baumann, P, Becvar, F, Berthoumieux, E, Calvino, F, Calviani, M, Cano-Ott, D, Capote, R, Carrapico, C, Cennini, P, Chepel, V, Chiaveri, E, Colonna, N, Cortes, G, Couture, A, Cox, J, Dahlfors, M, David, S, Dillmann, I, Dridi, W, Duran, I, Eleftheriadis, C, Embid-Segura, M, Ferrant, L, Ferrari, A, Ferreira-Marques, R, Furman, W, Goncalves, I, Gonzalez-Romero, E, Gramegna, F, Guerrero, C, Gunsing, F, Haas, B, Haight, R, Heil, M, Rauscher, T & n TOF Collaboration 2008, Capture cross section measurements of (186,187,188)Os at n_TOF: the resolved resonance region. in O Bersillon, F Gunsing, E Bauge, R Jacqmin & S Leray (eds), Int Conf on Nuclear Data for Science and Technology. vol. 1, EDP Sciences, CEDEX A, pp. 599-602, International Conference on Nuclear Data for Science and Technology, Nice, France, 22/04/07. https://doi.org/10.1051/ndata:07519

Capture cross section measurements of (186,187,188)Os at n_TOF: the resolved resonance region. / Fujii, K.; Mosconi, M.; Milazzo, P. M. et al.
Int Conf on Nuclear Data for Science and Technology. ed. / O. Bersillon; F. Gunsing; E. Bauge; R. Jacqmin; S. Leray. Vol. 1 CEDEX A: EDP Sciences, 2008. p. 599-602.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Capture cross section measurements of (186,187,188)Os at n_TOF

T2 - International Conference on Nuclear Data for Science and Technology

AU - Fujii, K.

AU - Mosconi, M.

AU - Milazzo, P. M.

AU - Domingo-Pardo, C.

AU - Kaeppeler, F.

AU - Mengoni, A.

AU - Abbondanno, U.

AU - Aerts, G.

AU - Alvarez, H.

AU - Alvarez-Velarde, F.

AU - Andriamonje, S.

AU - Andrzejewski, J.

AU - Assimakopoulos, P.

AU - Audouin, L.

AU - Badurek, G.

AU - Baumann, P.

AU - Becvar, F.

AU - Berthoumieux, E.

AU - Calvino, F.

AU - Calviani, M.

AU - Cano-Ott, D.

AU - Capote, R.

AU - Carrapico, C.

AU - Cennini, P.

AU - Chepel, V.

AU - Chiaveri, E.

AU - Colonna, N.

AU - Cortes, G.

AU - Couture, A.

AU - Cox, J.

AU - Dahlfors, M.

AU - David, S.

AU - Dillmann, I.

AU - Dridi, W.

AU - Duran, I.

AU - Eleftheriadis, C.

AU - Embid-Segura, M.

AU - Ferrant, L.

AU - Ferrari, A.

AU - Ferreira-Marques, R.

AU - Furman, W.

AU - Goncalves, I.

AU - Gonzalez-Romero, E.

AU - Gramegna, F.

AU - Guerrero, C.

AU - Gunsing, F.

AU - Haas, B.

AU - Haight, R.

AU - Heil, M.

AU - Rauscher, T.

AU - n TOF Collaboration

PY - 2008

Y1 - 2008

N2 - The neutron capture cross sections of (186,187,188)Os have been measured at the CERN neutron time-of-flight facility, n_TOF, in the neutron energy range from 1 eV up to 1 MeV. In this contribution, we report the results of the analysis of the resolved resonance region (RRR). Resonance parameters have been extracted from a full R-matrix fit of the capture yields with the SAMMY code. A statistical analysis has been performed and the related average resonance parameters are derived. This information is crucial for a complete understanding and modeling in terms of the Hauser-Feshbach statistical model of the capture and inelastic reaction channels, required for the evaluation of the stellar reaction rates of these isotopes. Maxwellian average cross sections for the range of temperatures relevant for s-process nucleosynthesis have been derived from the combined information of the experimental data in the resolved and unresolved resonance regions. A brief account of the implications of this analysis in the estimation of the s-process component of the (187)Os abundance and the related impact on the estimates of the time-duration of the galactic nucleosynthesis through the Re/Os clock is given.

AB - The neutron capture cross sections of (186,187,188)Os have been measured at the CERN neutron time-of-flight facility, n_TOF, in the neutron energy range from 1 eV up to 1 MeV. In this contribution, we report the results of the analysis of the resolved resonance region (RRR). Resonance parameters have been extracted from a full R-matrix fit of the capture yields with the SAMMY code. A statistical analysis has been performed and the related average resonance parameters are derived. This information is crucial for a complete understanding and modeling in terms of the Hauser-Feshbach statistical model of the capture and inelastic reaction channels, required for the evaluation of the stellar reaction rates of these isotopes. Maxwellian average cross sections for the range of temperatures relevant for s-process nucleosynthesis have been derived from the combined information of the experimental data in the resolved and unresolved resonance regions. A brief account of the implications of this analysis in the estimation of the s-process component of the (187)Os abundance and the related impact on the estimates of the time-duration of the galactic nucleosynthesis through the Re/Os clock is given.

KW - SYSTEM

KW - FACILITY

KW - NUCLEOSYNTHESIS

KW - NEUTRON

KW - CERN

U2 - 10.1051/ndata:07519

DO - 10.1051/ndata:07519

M3 - Conference contribution

SN - 978-2-7598-0090-2

VL - 1

SP - 599

EP - 602

BT - Int Conf on Nuclear Data for Science and Technology

A2 - Bersillon, O.

A2 - Gunsing, F.

A2 - Bauge, E.

A2 - Jacqmin, R.

A2 - Leray, S.

PB - EDP Sciences

CY - CEDEX A

Y2 - 22 April 2007 through 27 April 2007

ER -

Capture cross section measurements of (186,187,188)Os at n_TOF: the resolved resonance region

Abstract

Conference

Keywords

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