The La-139(n,gamma) cross section: Key for the onset of the s-process

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

doi:10.1103/PhysRevC.75.035807

The La-139(n,gamma) cross section: Key for the onset of the s-process

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

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Abstract

The nuclear resonance parameters and the capture cross section of the neutron magic isotope La-139 have been measured relative to Au-197 in the energy range of 0.6 eV to 9 keV at the neutron time-of-flight (n_TOF) facility at CERN. We describe the experimental apparatus and the data analysis procedures, which concerned mainly the efficiency correction by means of the pulse height weighting function technique and the determination of different background components. We extracted the resonance parameters and the main nuclear quantities such as the resonance integral RI=10.8 +/- 1.0b, the average gamma widths for s and p waves (l=0)=50.7 +/- 5.4 meV and (l=1)=33.6 +/- 6.9 meV, the nuclear level densities <D >(l=0)=252 +/- 22 eV and <D >(l=1)<250 eV, and the neutron strength functions S-0=(0.82 +/- 0.05)x10(-4) and S-1=(0.55 +/- 0.04)x10(-4). These results represent a significant improvement over previous data. The deduced Maxwellian-averaged capture cross sections are important for the interpretation of the most recent spectroscopic observations in low-metallicity stars.

Original language	English
Article number	035807
Number of pages	15
Journal	Physical Review C (nuclear physics)
Volume	75
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.75.035807
Publication status	Published - Mar 2007

Keywords

R-PROCESS ELEMENTS
NEUTRON-CAPTURE ELEMENTS
PROCESS NUCLEOSYNTHESIS
GIANT BRANCH STARS
RESONANCE SPECTROSCOPY
METAL-POOR STARS
N-TOF
DISPERSION SPECTROGRAPH
COOL DWARF STARS
GALACTIC CHEMICAL EVOLUTION

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10.1103/PhysRevC.75.035807

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Terlizzi, R., Abbondanno, U., Aerts, G., Alvarez, H., Alvarez-Velarde, H., Alvarez-Velarde, F., Andriamonje, S., Andrzejewski, J., Assimakopoulos, P., Audouin, L., Badurek, G., Baumann, P., Becvar, F., Berthoumieux, E., Calviani, M., Calvino, F., Cano-Ott, D., Capote, R., de Albornoz, A. C., ... Wisshak, K. (2007). The La-139(n,gamma) cross section: Key for the onset of the s-process. Physical Review C (nuclear physics), 75(3), Article 035807. https://doi.org/10.1103/PhysRevC.75.035807

@article{2cee01c22a4f49ae995db8a8e72e3e8d,

title = "The La-139(n,gamma) cross section: Key for the onset of the s-process",

abstract = "The nuclear resonance parameters and the capture cross section of the neutron magic isotope La-139 have been measured relative to Au-197 in the energy range of 0.6 eV to 9 keV at the neutron time-of-flight (n_TOF) facility at CERN. We describe the experimental apparatus and the data analysis procedures, which concerned mainly the efficiency correction by means of the pulse height weighting function technique and the determination of different background components. We extracted the resonance parameters and the main nuclear quantities such as the resonance integral RI=10.8 +/- 1.0b, the average gamma widths for s and p waves (l=0)=50.7 +/- 5.4 meV and (l=1)=33.6 +/- 6.9 meV, the nuclear level densities (l=0)=252 +/- 22 eV and (l=1)<250 eV, and the neutron strength functions S-0=(0.82 +/- 0.05)x10(-4) and S-1=(0.55 +/- 0.04)x10(-4). These results represent a significant improvement over previous data. The deduced Maxwellian-averaged capture cross sections are important for the interpretation of the most recent spectroscopic observations in low-metallicity stars.",

keywords = "R-PROCESS ELEMENTS, NEUTRON-CAPTURE ELEMENTS, PROCESS NUCLEOSYNTHESIS, GIANT BRANCH STARS, RESONANCE SPECTROSCOPY, METAL-POOR STARS, N-TOF, DISPERSION SPECTROGRAPH, COOL DWARF STARS, GALACTIC CHEMICAL EVOLUTION",

author = "R. Terlizzi and U. Abbondanno and G. Aerts and H. Alvarez and H. Alvarez-Velarde 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 M. Calviani and F. Calvino and D. Cano-Ott and R. Capote and {de Albornoz}, {A. Carrillo} 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 R. Dolfini and C. Domingo-Pardo and W. Dridi and I. Duran and C. Eleftheriadis and M. Embid-Segura and L. Ferrant and A. Ferrari and R. Ferreira-Marques and L. Fitzpatrick and H. Frais-Koelbl and K. Fujii and W. Furman and R. Gallino and I. Goncalves and E. Gonzalez-Romero and A. Goverdovski and F. Gramegna and E. Griesmayer and C. Guerrero and F. Gunsing and B. Haas and R. Haight and M. Heil and A. Herrera-Martinez and M. Igashira and S. Isaev and E. Jericha and Y. Kadi and F. Kaeppeler and D. Karamanis and D. Karadimos and M. Kerveno and V. Ketlerov and P. Koehler and V. Konovalov and E. Kossionides and M. Krticka and C. Lamboudis and H. Leeb and A. Lindote and I. Lopes and M. Lozano and S. Lukic and J. Marganiec and L. Marques and S. Marrone and C. Massimi and P. Mastinu and A. Mengoni and Milazzo, {P. M.} and C. Moreau and M. Mosconi and F. Neves and H. Oberhummer and S. O'Brien and J. Pancin and C. Papachristodoulou and C. Papadopoulos and C. Paradela and N. Patronis and A. Pavlik and P. Pavlopoulos and L. Perrot and M. Pignatari and R. Plag and A. Plompen and A. Plukis and A. Poch and C. Pretel and J. Quesada and T. Rauscher and R. Reifarth and M. Rosetti and C. Rubbia and G. Rudolf and P. Rullhusen and J. Salgado and L. Sarchiapone and I. Savvidis and C. Stephan and G. Tagliente and Tain, {J. L.} and L. Tassan-Got and L. Tavora and G. Vannini and P. Vaz and A. Ventura and D. Villamarin and Vincente, {M. C.} and V. Vlachoudis and R. Vlastou and F. Voss and S. Walter and H. Wendler and M. Wiescher and K. Wisshak",

year = "2007",

month = mar,

doi = "10.1103/PhysRevC.75.035807",

language = "English",

volume = "75",

journal = "Physical Review C (nuclear physics)",

issn = "2469-9985",

publisher = "American Physical Society",

number = "3",

}

Terlizzi, R, Abbondanno, U, Aerts, G, Alvarez, H, Alvarez-Velarde, H, Alvarez-Velarde, F, Andriamonje, S, Andrzejewski, J, Assimakopoulos, P, Audouin, L, Badurek, G, Baumann, P, Becvar, F, Berthoumieux, E, Calviani, M, Calvino, F, Cano-Ott, D, Capote, R, de Albornoz, AC, Cennini, P, Chepel, V, Chiaveri, E, Colonna, N, Cortes, G, Couture, A, Cox, J, Dahlfors, M, David, S, Dillmann, I, Dolfini, R, Domingo-Pardo, C, Dridi, W, Duran, I, Eleftheriadis, C, Embid-Segura, M, Ferrant, L, Ferrari, A, Ferreira-Marques, R, Fitzpatrick, L, Frais-Koelbl, H, Fujii, K, Furman, W, Gallino, R, Goncalves, I, Gonzalez-Romero, E, Goverdovski, A, Gramegna, F, Griesmayer, E, Guerrero, C, Gunsing, F, Haas, B, Haight, R, Heil, M, Herrera-Martinez, A, Igashira, M, Isaev, S, Jericha, E, Kadi, Y, Kaeppeler, F, Karamanis, D, Karadimos, D, Kerveno, M, Ketlerov, V, Koehler, P, Konovalov, V, Kossionides, E, Krticka, M, Lamboudis, C, Leeb, H, Lindote, A, Lopes, I, Lozano, M, Lukic, S, Marganiec, J, Marques, L, Marrone, S, Massimi, C, Mastinu, P, Mengoni, A, Milazzo, PM, Moreau, C, Mosconi, M, Neves, F, Oberhummer, H, O'Brien, S, Pancin, J, Papachristodoulou, C, Papadopoulos, C, Paradela, C, Patronis, N, Pavlik, A, Pavlopoulos, P, Perrot, L, Pignatari, M, Plag, R, Plompen, A, Plukis, A, Poch, A, Pretel, C, Quesada, J, Rauscher, T, Reifarth, R, Rosetti, M, Rubbia, C, Rudolf, G, Rullhusen, P, Salgado, J, Sarchiapone, L, Savvidis, I, Stephan, C, Tagliente, G, Tain, JL, Tassan-Got, L, Tavora, L, Vannini, G, Vaz, P, Ventura, A, Villamarin, D, Vincente, MC, Vlachoudis, V, Vlastou, R, Voss, F, Walter, S, Wendler, H, Wiescher, M & Wisshak, K 2007, 'The La-139(n,gamma) cross section: Key for the onset of the s-process', Physical Review C (nuclear physics), vol. 75, no. 3, 035807. https://doi.org/10.1103/PhysRevC.75.035807

TY - JOUR

T1 - The La-139(n,gamma) cross section

T2 - Key for the onset of the s-process

AU - Terlizzi, R.

AU - Abbondanno, U.

AU - Aerts, G.

AU - Alvarez, H.

AU - Alvarez-Velarde, 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 - Calviani, M.

AU - Calvino, F.

AU - Cano-Ott, D.

AU - Capote, R.

AU - de Albornoz, A. Carrillo

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 - Dolfini, R.

AU - Domingo-Pardo, C.

AU - Dridi, W.

AU - Duran, I.

AU - Eleftheriadis, C.

AU - Embid-Segura, M.

AU - Ferrant, L.

AU - Ferrari, A.

AU - Ferreira-Marques, R.

AU - Fitzpatrick, L.

AU - Frais-Koelbl, H.

AU - Fujii, K.

AU - Furman, W.

AU - Gallino, R.

AU - Goncalves, I.

AU - Gonzalez-Romero, E.

AU - Goverdovski, A.

AU - Gramegna, F.

AU - Griesmayer, E.

AU - Guerrero, C.

AU - Gunsing, F.

AU - Haas, B.

AU - Haight, R.

AU - Heil, M.

AU - Herrera-Martinez, A.

AU - Igashira, M.

AU - Isaev, S.

AU - Jericha, E.

AU - Kadi, Y.

AU - Kaeppeler, F.

AU - Karamanis, D.

AU - Karadimos, D.

AU - Kerveno, M.

AU - Ketlerov, V.

AU - Koehler, P.

AU - Konovalov, V.

AU - Kossionides, E.

AU - Krticka, M.

AU - Lamboudis, C.

AU - Leeb, H.

AU - Lindote, A.

AU - Lopes, I.

AU - Lozano, M.

AU - Lukic, S.

AU - Marganiec, J.

AU - Marques, L.

AU - Marrone, S.

AU - Massimi, C.

AU - Mastinu, P.

AU - Mengoni, A.

AU - Milazzo, P. M.

AU - Moreau, C.

AU - Mosconi, M.

AU - Neves, F.

AU - Oberhummer, H.

AU - O'Brien, S.

AU - Pancin, J.

AU - Papachristodoulou, C.

AU - Papadopoulos, C.

AU - Paradela, C.

AU - Patronis, N.

AU - Pavlik, A.

AU - Pavlopoulos, P.

AU - Perrot, L.

AU - Pignatari, M.

AU - Plag, R.

AU - Plompen, A.

AU - Plukis, A.

AU - Poch, A.

AU - Pretel, C.

AU - Quesada, J.

AU - Rauscher, T.

AU - Reifarth, R.

AU - Rosetti, M.

AU - Rubbia, C.

AU - Rudolf, G.

AU - Rullhusen, P.

AU - Salgado, J.

AU - Sarchiapone, L.

AU - Savvidis, I.

AU - Stephan, C.

AU - Tagliente, G.

AU - Tain, J. L.

AU - Tassan-Got, L.

AU - Tavora, L.

AU - Vannini, G.

AU - Vaz, P.

AU - Ventura, A.

AU - Villamarin, D.

AU - Vincente, M. C.

AU - Vlachoudis, V.

AU - Vlastou, R.

AU - Voss, F.

AU - Walter, S.

AU - Wendler, H.

AU - Wiescher, M.

AU - Wisshak, K.

PY - 2007/3

Y1 - 2007/3

N2 - The nuclear resonance parameters and the capture cross section of the neutron magic isotope La-139 have been measured relative to Au-197 in the energy range of 0.6 eV to 9 keV at the neutron time-of-flight (n_TOF) facility at CERN. We describe the experimental apparatus and the data analysis procedures, which concerned mainly the efficiency correction by means of the pulse height weighting function technique and the determination of different background components. We extracted the resonance parameters and the main nuclear quantities such as the resonance integral RI=10.8 +/- 1.0b, the average gamma widths for s and p waves (l=0)=50.7 +/- 5.4 meV and (l=1)=33.6 +/- 6.9 meV, the nuclear level densities (l=0)=252 +/- 22 eV and (l=1)<250 eV, and the neutron strength functions S-0=(0.82 +/- 0.05)x10(-4) and S-1=(0.55 +/- 0.04)x10(-4). These results represent a significant improvement over previous data. The deduced Maxwellian-averaged capture cross sections are important for the interpretation of the most recent spectroscopic observations in low-metallicity stars.

AB - The nuclear resonance parameters and the capture cross section of the neutron magic isotope La-139 have been measured relative to Au-197 in the energy range of 0.6 eV to 9 keV at the neutron time-of-flight (n_TOF) facility at CERN. We describe the experimental apparatus and the data analysis procedures, which concerned mainly the efficiency correction by means of the pulse height weighting function technique and the determination of different background components. We extracted the resonance parameters and the main nuclear quantities such as the resonance integral RI=10.8 +/- 1.0b, the average gamma widths for s and p waves (l=0)=50.7 +/- 5.4 meV and (l=1)=33.6 +/- 6.9 meV, the nuclear level densities (l=0)=252 +/- 22 eV and (l=1)<250 eV, and the neutron strength functions S-0=(0.82 +/- 0.05)x10(-4) and S-1=(0.55 +/- 0.04)x10(-4). These results represent a significant improvement over previous data. The deduced Maxwellian-averaged capture cross sections are important for the interpretation of the most recent spectroscopic observations in low-metallicity stars.

KW - R-PROCESS ELEMENTS

KW - NEUTRON-CAPTURE ELEMENTS

KW - PROCESS NUCLEOSYNTHESIS

KW - GIANT BRANCH STARS

KW - RESONANCE SPECTROSCOPY

KW - METAL-POOR STARS

KW - N-TOF

KW - DISPERSION SPECTROGRAPH

KW - COOL DWARF STARS

KW - GALACTIC CHEMICAL EVOLUTION

U2 - 10.1103/PhysRevC.75.035807

DO - 10.1103/PhysRevC.75.035807

M3 - Article

SN - 2469-9985

VL - 75

JO - Physical Review C (nuclear physics)

JF - Physical Review C (nuclear physics)

IS - 3

M1 - 035807

ER -

The La-139(n,gamma) cross section: Key for the onset of the s-process

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