Measurement of the Se 78 (n,γ) Se 79 cross section up to 600 keV at the n_TOF facility at CERN

n_TOF Collaboration; N. V. Sosnin; C. Lederer-Woods; R. Garg; U. Battino; S. Cristallo; M. Dietz; S. Heinitz; M. Krtička; R. Reifarth; S. Valenta; D. Vescovi; O. Aberle; V. Alcayne; S. Amaducci; J. Andrzejewski; L. Audouin; V. Bécares; V. Babiano-Suarez; M. Bacak; M. Barbagallo; F. Bečvář; G. Bellia; E. Berthoumieux; J. Billowes; D. Bosnar; A. Brown; M. Busso; M. Caamaño; L. Caballero; F. Calviño; M. Calviani; D. Cano-Ott; A. Casanovas; F. Cerutti; Y. H. Chen; E. Chiaveri; N. Colonna; G. Cortés; M. A. Cortés-Giraldo; L. Cosentino; L. A. Damone; M. Diakaki; C. Domingo-Pardo; R. Dressler; E. Dupont; I. Durán; Z. Eleme; B. Fernández-Domínguez; A. Ferrari; T. Rauscher

doi:10.1103/PhysRevC.110.065805

Measurement of the Se 78 (n,γ) Se 79 cross section up to 600 keV at the n_TOF facility at CERN

n_TOF Collaboration
, N. V. Sosnin
, C. Lederer-Woods
, R. Garg
, U. Battino
, S. Cristallo
, M. Dietz
, S. Heinitz
, M. Krtička
, R. Reifarth
, S. Valenta
, D. Vescovi
, O. Aberle
, V. Alcayne
, S. Amaducci
, J. Andrzejewski
, L. Audouin
, V. Bécares
, V. Babiano-Suarez
, M. Bacak

M. Barbagallo, F. Bečvář, G. Bellia, E. Berthoumieux, J. Billowes, D. Bosnar, A. Brown, M. Busso, M. Caamaño, L. Caballero, F. Calviño, M. Calviani, D. Cano-Ott, A. Casanovas, F. Cerutti, Y. H. Chen, E. Chiaveri, N. Colonna, G. Cortés, M. A. Cortés-Giraldo, L. Cosentino, L. A. Damone, M. Diakaki, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, Z. Eleme, B. Fernández-Domínguez, A. Ferrari, T. Rauscher

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Abstract

The Se78(n,γ)Se79 cross section has a high impact on the abundances of Se78 produced during the slow neutron capture process (s process) in massive stars. A measurement of the Se78 radiative neutron capture cross section has been performed at the Neutron Time-of-Flight facility at CERN using a set of liquid scintillation detectors that have been optimized for a low sensitivity to neutrons. We present resonance capture kernels up to 70 keV and cross section from 70 to 600 keV. Maxwellian-averaged cross section (MACS) values were calculated for stellar temperatures between kT=5 and 100 keV, with uncertainties between 4.6% and 5.8%. The new MACS values result in substantial decreases of 20-30% of Se78 abundances produced in the s process in massive stars and AGB stars. Massive stars are now predicted to produce subsolar Se78/Se76 ratios, which is expected since Se76 is an s-only isotope, while solar Se78 abundances have also contributions from other nucleosynthesis processes.

Original language	English
Article number	065805
Number of pages	12
Journal	Physical Review C
Volume	110
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.110.065805
Publication status	Published - 17 Dec 2024

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© 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. https://creativecommons.org/licenses/by/4.0/
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n_TOF Collaboration, Sosnin, N. V., Lederer-Woods, C., Garg, R., Battino, U., Cristallo, S., Dietz, M., Heinitz, S., Krtička, M., Reifarth, R., Valenta, S., Vescovi, D., Aberle, O., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Bécares, V., Babiano-Suarez, V., ... Rauscher, T. (2024). Measurement of the Se 78 (n,γ) Se 79 cross section up to 600 keV at the n_TOF facility at CERN. Physical Review C, 110(6), Article 065805. https://doi.org/10.1103/PhysRevC.110.065805

@article{a9e1d119c01c4e3492df32d56b87fb8d,

title = "Measurement of the Se 78 (n,γ) Se 79 cross section up to 600 keV at the n\_TOF facility at CERN",

abstract = "The Se78(n,γ)Se79 cross section has a high impact on the abundances of Se78 produced during the slow neutron capture process (s process) in massive stars. A measurement of the Se78 radiative neutron capture cross section has been performed at the Neutron Time-of-Flight facility at CERN using a set of liquid scintillation detectors that have been optimized for a low sensitivity to neutrons. We present resonance capture kernels up to 70 keV and cross section from 70 to 600 keV. Maxwellian-averaged cross section (MACS) values were calculated for stellar temperatures between kT=5 and 100 keV, with uncertainties between 4.6\% and 5.8\%. The new MACS values result in substantial decreases of 20-30\% of Se78 abundances produced in the s process in massive stars and AGB stars. Massive stars are now predicted to produce subsolar Se78/Se76 ratios, which is expected since Se76 is an s-only isotope, while solar Se78 abundances have also contributions from other nucleosynthesis processes.",

author = "\{n\_TOF Collaboration\} and Sosnin, \{N. V.\} and C. Lederer-Woods and R. Garg and U. Battino and S. Cristallo and M. Dietz and S. Heinitz and M. Krti{\v c}ka and R. Reifarth and S. Valenta and D. Vescovi and O. Aberle and V. Alcayne and S. Amaducci and J. Andrzejewski and L. Audouin and V. B{\'e}cares and V. Babiano-Suarez and M. Bacak and M. Barbagallo and F. Be{\v c}v{\'a}{\v r} and G. Bellia and E. Berthoumieux and J. Billowes and D. Bosnar and A. Brown and M. Busso and M. Caama{\~n}o and L. Caballero and F. Calvi{\~n}o and M. Calviani and D. Cano-Ott and A. Casanovas and F. Cerutti and Chen, \{Y. H.\} and E. Chiaveri and N. Colonna and G. Cort{\'e}s and Cort{\'e}s-Giraldo, \{M. A.\} and L. Cosentino and Damone, \{L. A.\} and M. Diakaki and C. Domingo-Pardo and R. Dressler and E. Dupont and I. Dur{\'a}n and Z. Eleme and B. Fern{\'a}ndez-Dom{\'i}nguez and A. Ferrari and T. Rauscher",

note = "{\textcopyright} 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. https://creativecommons.org/licenses/by/4.0/",

year = "2024",

month = dec,

day = "17",

doi = "10.1103/PhysRevC.110.065805",

language = "English",

volume = "110",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "6",

}

n_TOF Collaboration, Sosnin, NV, Lederer-Woods, C, Garg, R, Battino, U, Cristallo, S, Dietz, M, Heinitz, S, Krtička, M, Reifarth, R, Valenta, S, Vescovi, D, Aberle, O, Alcayne, V, Amaducci, S, Andrzejewski, J, Audouin, L, Bécares, V, Babiano-Suarez, V, Bacak, M, Barbagallo, M, Bečvář, F, Bellia, G, Berthoumieux, E, Billowes, J, Bosnar, D, Brown, A, Busso, M, Caamaño, M, Caballero, L, Calviño, F, Calviani, M, Cano-Ott, D, Casanovas, A, Cerutti, F, Chen, YH, Chiaveri, E, Colonna, N, Cortés, G, Cortés-Giraldo, MA, Cosentino, L, Damone, LA, Diakaki, M, Domingo-Pardo, C, Dressler, R, Dupont, E, Durán, I, Eleme, Z, Fernández-Domínguez, B, Ferrari, A & Rauscher, T 2024, 'Measurement of the Se 78 (n,γ) Se 79 cross section up to 600 keV at the n_TOF facility at CERN', Physical Review C, vol. 110, no. 6, 065805. https://doi.org/10.1103/PhysRevC.110.065805

TY - JOUR

T1 - Measurement of the Se 78 (n,γ) Se 79 cross section up to 600 keV at the n_TOF facility at CERN

AU - n_TOF Collaboration

AU - Sosnin, N. V.

AU - Lederer-Woods, C.

AU - Garg, R.

AU - Battino, U.

AU - Cristallo, S.

AU - Dietz, M.

AU - Heinitz, S.

AU - Krtička, M.

AU - Reifarth, R.

AU - Valenta, S.

AU - Vescovi, D.

AU - Aberle, O.

AU - Alcayne, V.

AU - Amaducci, S.

AU - Andrzejewski, J.

AU - Audouin, L.

AU - Bécares, V.

AU - Babiano-Suarez, V.

AU - Bacak, M.

AU - Barbagallo, M.

AU - Bečvář, F.

AU - Bellia, G.

AU - Berthoumieux, E.

AU - Billowes, J.

AU - Bosnar, D.

AU - Brown, A.

AU - Busso, M.

AU - Caamaño, M.

AU - Caballero, L.

AU - Calviño, F.

AU - Calviani, M.

AU - Cano-Ott, D.

AU - Casanovas, A.

AU - Cerutti, F.

AU - Chen, Y. H.

AU - Chiaveri, E.

AU - Colonna, N.

AU - Cortés, G.

AU - Cortés-Giraldo, M. A.

AU - Cosentino, L.

AU - Damone, L. A.

AU - Diakaki, M.

AU - Domingo-Pardo, C.

AU - Dressler, R.

AU - Dupont, E.

AU - Durán, I.

AU - Eleme, Z.

AU - Fernández-Domínguez, B.

AU - Ferrari, A.

AU - Rauscher, T.

N1 - © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. https://creativecommons.org/licenses/by/4.0/

PY - 2024/12/17

Y1 - 2024/12/17

N2 - The Se78(n,γ)Se79 cross section has a high impact on the abundances of Se78 produced during the slow neutron capture process (s process) in massive stars. A measurement of the Se78 radiative neutron capture cross section has been performed at the Neutron Time-of-Flight facility at CERN using a set of liquid scintillation detectors that have been optimized for a low sensitivity to neutrons. We present resonance capture kernels up to 70 keV and cross section from 70 to 600 keV. Maxwellian-averaged cross section (MACS) values were calculated for stellar temperatures between kT=5 and 100 keV, with uncertainties between 4.6% and 5.8%. The new MACS values result in substantial decreases of 20-30% of Se78 abundances produced in the s process in massive stars and AGB stars. Massive stars are now predicted to produce subsolar Se78/Se76 ratios, which is expected since Se76 is an s-only isotope, while solar Se78 abundances have also contributions from other nucleosynthesis processes.

AB - The Se78(n,γ)Se79 cross section has a high impact on the abundances of Se78 produced during the slow neutron capture process (s process) in massive stars. A measurement of the Se78 radiative neutron capture cross section has been performed at the Neutron Time-of-Flight facility at CERN using a set of liquid scintillation detectors that have been optimized for a low sensitivity to neutrons. We present resonance capture kernels up to 70 keV and cross section from 70 to 600 keV. Maxwellian-averaged cross section (MACS) values were calculated for stellar temperatures between kT=5 and 100 keV, with uncertainties between 4.6% and 5.8%. The new MACS values result in substantial decreases of 20-30% of Se78 abundances produced in the s process in massive stars and AGB stars. Massive stars are now predicted to produce subsolar Se78/Se76 ratios, which is expected since Se76 is an s-only isotope, while solar Se78 abundances have also contributions from other nucleosynthesis processes.

UR - https://www.scopus.com/pages/publications/85213377363

U2 - 10.1103/PhysRevC.110.065805

DO - 10.1103/PhysRevC.110.065805

M3 - Article

AN - SCOPUS:85213377363

SN - 2469-9985

VL - 110

JO - Physical Review C

JF - Physical Review C

IS - 6

M1 - 065805

ER -

Measurement of the Se 78 (n,γ) Se 79 cross section up to 600 keV at the n_TOF facility at CERN

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