Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg

C. Massimi; S. Altstadt; J. Andrzejewski; L. Audouin; M. Barbagallo; V. Bécares; F. Bečvář; F. Belloni; E. Berthoumieux; J. Billowes; S. Bisterzo; D. Bosnar; M. Brugger; M. Calviani; F. Calviño; D. Cano-Ott; C. Carrapiço; D.M. Castelluccio; F. Cerutti; E. Chiaveri; L. Cosentino; M. Chin; G. Clai; N. Colonna; G. Cortés; M.A. Cortés-Giraldo; S. Cristallo; M. Diakaki; C. Domingo-Pardo; I. Duran; R. Dressler; C. Eleftheriadis; A. Ferrari; P. Finocchiaro; K. Fraval; S. Ganesan; A.R. García; G. Giubrone; I.F. Gonçalves; E. González-Romero; E. Griesmayer; C. Guerrero; F. Gunsing; A. Hernández-Prieto; D.G. Jenkins; E. Jericha; Y. Kadi; F. Käppeler; D. Karadimos; N. Kivel; P. Koehler; M. Kokkoris; S. Kopecky; M. Krtička; J. Kroll; C. Lampoudis; C. Langer; E. Leal-Cidoncha; C. Lederer; H. Leeb; L.S. Leong; S. Lo Meo; R. Losito; A. Mallick; A. Manousos; J. Marganiec; T. Martínez; P.F. Mastinu; M. Mastromarco; E. Mendoza; A. Mengoni; P.M. Milazzo; F. Mingrone; M. Mirea; W. Mondelaers; A. Musumarra; C. Paradela; A. Pavlik; J. Perkowski; M. Pignatari; L. Piersanti; A. Plompen; J. Praena; J.M. Quesada; T. Rauscher; R. Reifarth; A. Riego; M.S. Robles; C. Rubbia; M. Sabaté-Gilarte; R. Sarmento; A. Saxena; P. Schillebeeckx; S. Schmidt; D. Schumann; G. Tagliente; J.L. Tain; D. Tarrío; L. Tassan-Got; A. Tsinganis; S. Valenta; G. Vannini; I. Van Rijs; V. Variale; P. Vaz; A. Ventura; M.J. Vermeulen; V. Vlachoudis; R. Vlastou; A. Wallner; T. Ware; M. Weigand; C. Weiß; R. Wynants; T. Wright; P. Žugec

doi:10.1016/j.physletb.2017.02.025

Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg

C. Massimi
, S. Altstadt
, J. Andrzejewski
, L. Audouin
, M. Barbagallo
, V. Bécares
, F. Bečvář
, F. Belloni
, E. Berthoumieux
, J. Billowes
, S. Bisterzo
, D. Bosnar
, M. Brugger
, M. Calviani
, F. Calviño
, D. Cano-Ott
, C. Carrapiço
, D.M. Castelluccio
, F. Cerutti
, E. Chiaveri

L. Cosentino, M. Chin, G. Clai, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, S. Cristallo, M. Diakaki, C. Domingo-Pardo, I. Duran, R. Dressler, C. Eleftheriadis, A. Ferrari, P. Finocchiaro, K. Fraval, S. Ganesan, A.R. García, G. Giubrone, I.F. Gonçalves, E. González-Romero, E. Griesmayer, C. Guerrero, F. Gunsing, A. Hernández-Prieto, D.G. Jenkins, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimos, N. Kivel, P. Koehler, M. Kokkoris, S. Kopecky, M. Krtička, J. Kroll, C. Lampoudis, C. Langer, E. Leal-Cidoncha, C. Lederer, H. Leeb, L.S. Leong, S. Lo Meo, R. Losito, A. Mallick, A. Manousos, J. Marganiec, T. Martínez, P.F. Mastinu, M. Mastromarco, E. Mendoza, A. Mengoni, P.M. Milazzo, F. Mingrone, M. Mirea, W. Mondelaers, A. Musumarra, C. Paradela, A. Pavlik, J. Perkowski, M. Pignatari, L. Piersanti, A. Plompen, J. Praena, J.M. Quesada, T. Rauscher, R. Reifarth, A. Riego, M.S. Robles, C. Rubbia, M. Sabaté-Gilarte, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, G. Tagliente, J.L. Tain, D. Tarrío, L. Tassan-Got, A. Tsinganis, S. Valenta, G. Vannini, I. Van Rijs, V. Variale, P. Vaz, A. Ventura, M.J. Vermeulen, V. Vlachoudis, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Weiß, R. Wynants, T. Wright, P. Žugec

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Abstract

This work reports on accurate, high-resolution measurements of the 25Mg(n,γ)26Mg and 25Mg(n,tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25Mg(n,γ)26Mg parametrization. The relevant resonances for n+25Mg were characterized from a combined R-matrix analysis of the experimental data. This resulted in an unambiguous spin/parity assignment of the corresponding excited states in 26Mg. With this information experimental upper limits of the reaction rates for 22Ne(α,n)25Mg and 22Ne(α,γ)26Mg were established, potentially leading to a significantly higher (α,n)/(α,γ) ratio than previously evaluated. The impact of these results has been studied for stellar models in the mass range 2 to 25 M⊙.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Physics Letters B
Volume	768
Early online date	16 Feb 2017
DOIs	https://doi.org/10.1016/j.physletb.2017.02.025
Publication status	Published - 10 May 2017

Keywords

s Process
α + 22 Ne
Neutron spectroscopy

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10.1016/j.physletb.2017.02.025Licence: CC BY

1-s2.0-S0370269317301260-mainFinal published version, 1.07 MBLicence: CC BY

http://www.sciencedirect.com/science/article/pii/S0370269317301260Licence: CC BY

Cite this

Massimi, C., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bisterzo, S., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Castelluccio, D. M., Cerutti, F., ... Žugec, P. (2017). Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg. Physics Letters B, 768, 1-6. https://doi.org/10.1016/j.physletb.2017.02.025

@article{4c113692a96742729d4170d9d8d1e25b,

title = "Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg",

abstract = "This work reports on accurate, high-resolution measurements of the 25Mg(n,γ)26Mg and 25Mg(n,tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25Mg(n,γ)26Mg parametrization. The relevant resonances for n+25Mg were characterized from a combined R-matrix analysis of the experimental data. This resulted in an unambiguous spin/parity assignment of the corresponding excited states in 26Mg. With this information experimental upper limits of the reaction rates for 22Ne(α,n)25Mg and 22Ne(α,γ)26Mg were established, potentially leading to a significantly higher (α,n)/(α,γ) ratio than previously evaluated. The impact of these results has been studied for stellar models in the mass range 2 to 25 M⊙.",

keywords = "s Process, α + 22 Ne, Neutron spectroscopy",

author = "C. Massimi and S. Altstadt and J. Andrzejewski and L. Audouin and M. Barbagallo and V. B{\'e}cares and F. Be{\v c}v{\'a}{\v r} and F. Belloni and E. Berthoumieux and J. Billowes and S. Bisterzo and D. Bosnar and M. Brugger and M. Calviani and F. Calvi{\~n}o and D. Cano-Ott and C. Carrapi{\c c}o and D.M. Castelluccio and F. Cerutti and E. Chiaveri and L. Cosentino and M. Chin and G. Clai and N. Colonna and G. Cort{\'e}s and M.A. Cort{\'e}s-Giraldo and S. Cristallo and M. Diakaki and C. Domingo-Pardo and I. Duran and R. Dressler and C. Eleftheriadis and A. Ferrari and P. Finocchiaro and K. Fraval and S. Ganesan and A.R. Garc{\'i}a and G. Giubrone and I.F. Gon{\c c}alves and E. Gonz{\'a}lez-Romero and E. Griesmayer and C. Guerrero and F. Gunsing and A. Hern{\'a}ndez-Prieto and D.G. Jenkins and E. Jericha and Y. Kadi and F. K{\"a}ppeler and D. Karadimos and N. Kivel and P. Koehler and M. Kokkoris and S. Kopecky and M. Krti{\v c}ka and J. Kroll and C. Lampoudis and C. Langer and E. Leal-Cidoncha and C. Lederer and H. Leeb and L.S. Leong and \{Lo Meo\}, S. and R. Losito and A. Mallick and A. Manousos and J. Marganiec and T. Mart{\'i}nez and P.F. Mastinu and M. Mastromarco and E. Mendoza and A. Mengoni and P.M. Milazzo and F. Mingrone and M. Mirea and W. Mondelaers and A. Musumarra and C. Paradela and A. Pavlik and J. Perkowski and M. Pignatari and L. Piersanti and A. Plompen and J. Praena and J.M. Quesada and T. Rauscher and R. Reifarth and A. Riego and M.S. Robles and C. Rubbia and M. Sabat{\'e}-Gilarte and R. Sarmento and A. Saxena and P. Schillebeeckx and S. Schmidt and D. Schumann and G. Tagliente and J.L. Tain and D. Tarr{\'i}o and L. Tassan-Got and A. Tsinganis and S. Valenta and G. Vannini and \{Van Rijs\}, I. and V. Variale and P. Vaz and A. Ventura and M.J. Vermeulen and V. Vlachoudis and R. Vlastou and A. Wallner and T. Ware and M. Weigand and C. Wei{\ss} and R. Wynants and T. Wright and P. {\v Z}ugec",

note = "This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. Open Access funded by SCOAP³ - Sponsoring Consortium for Open Access Publishing in Particle Physics. C. Massimi, et al, 'Neuron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne (a,n) 25Mg', Physics Letters B, Vol. 768, first published online 16 February 2017. The version of record is available online at doi: http://dx.doi.org/10.1016/j.physletb.2017.02.025 {\textcopyright} 2017 The Authors. Published by Elsevier B. V. ",

year = "2017",

month = may,

day = "10",

doi = "10.1016/j.physletb.2017.02.025",

language = "English",

volume = "768",

pages = "1--6",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

}

Massimi, C, Altstadt, S, Andrzejewski, J, Audouin, L, Barbagallo, M, Bécares, V, Bečvář, F, Belloni, F, Berthoumieux, E, Billowes, J, Bisterzo, S, Bosnar, D, Brugger, M, Calviani, M, Calviño, F, Cano-Ott, D, Carrapiço, C, Castelluccio, DM, Cerutti, F, Chiaveri, E, Cosentino, L, Chin, M, Clai, G, Colonna, N, Cortés, G, Cortés-Giraldo, MA, Cristallo, S, Diakaki, M, Domingo-Pardo, C, Duran, I, Dressler, R, Eleftheriadis, C, Ferrari, A, Finocchiaro, P, Fraval, K, Ganesan, S, García, AR, Giubrone, G, Gonçalves, IF, González-Romero, E, Griesmayer, E, Guerrero, C, Gunsing, F, Hernández-Prieto, A, Jenkins, DG, Jericha, E, Kadi, Y, Käppeler, F, Karadimos, D, Kivel, N, Koehler, P, Kokkoris, M, Kopecky, S, Krtička, M, Kroll, J, Lampoudis, C, Langer, C, Leal-Cidoncha, E, Lederer, C, Leeb, H, Leong, LS, Lo Meo, S, Losito, R, Mallick, A, Manousos, A, Marganiec, J, Martínez, T, Mastinu, PF, Mastromarco, M, Mendoza, E, Mengoni, A, Milazzo, PM, Mingrone, F, Mirea, M, Mondelaers, W, Musumarra, A, Paradela, C, Pavlik, A, Perkowski, J, Pignatari, M, Piersanti, L, Plompen, A, Praena, J, Quesada, JM, Rauscher, T, Reifarth, R, Riego, A, Robles, MS, Rubbia, C, Sabaté-Gilarte, M, Sarmento, R, Saxena, A, Schillebeeckx, P, Schmidt, S, Schumann, D, Tagliente, G, Tain, JL, Tarrío, D, Tassan-Got, L, Tsinganis, A, Valenta, S, Vannini, G, Van Rijs, I, Variale, V, Vaz, P, Ventura, A, Vermeulen, MJ, Vlachoudis, V, Vlastou, R, Wallner, A, Ware, T, Weigand, M, Weiß, C, Wynants, R, Wright, T & Žugec, P 2017, 'Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg', Physics Letters B, vol. 768, pp. 1-6. https://doi.org/10.1016/j.physletb.2017.02.025

TY - JOUR

T1 - Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg

AU - Massimi, C.

AU - Altstadt, S.

AU - Andrzejewski, J.

AU - Audouin, L.

AU - Barbagallo, M.

AU - Bécares, V.

AU - Bečvář, F.

AU - Belloni, F.

AU - Berthoumieux, E.

AU - Billowes, J.

AU - Bisterzo, S.

AU - Bosnar, D.

AU - Brugger, M.

AU - Calviani, M.

AU - Calviño, F.

AU - Cano-Ott, D.

AU - Carrapiço, C.

AU - Castelluccio, D.M.

AU - Cerutti, F.

AU - Chiaveri, E.

AU - Cosentino, L.

AU - Chin, M.

AU - Clai, G.

AU - Colonna, N.

AU - Cortés, G.

AU - Cortés-Giraldo, M.A.

AU - Cristallo, S.

AU - Diakaki, M.

AU - Domingo-Pardo, C.

AU - Duran, I.

AU - Dressler, R.

AU - Eleftheriadis, C.

AU - Ferrari, A.

AU - Finocchiaro, P.

AU - Fraval, K.

AU - Ganesan, S.

AU - García, A.R.

AU - Giubrone, G.

AU - Gonçalves, I.F.

AU - González-Romero, E.

AU - Griesmayer, E.

AU - Guerrero, C.

AU - Gunsing, F.

AU - Hernández-Prieto, A.

AU - Jenkins, D.G.

AU - Jericha, E.

AU - Kadi, Y.

AU - Käppeler, F.

AU - Karadimos, D.

AU - Kivel, N.

AU - Koehler, P.

AU - Kokkoris, M.

AU - Kopecky, S.

AU - Krtička, M.

AU - Kroll, J.

AU - Lampoudis, C.

AU - Langer, C.

AU - Leal-Cidoncha, E.

AU - Lederer, C.

AU - Leeb, H.

AU - Leong, L.S.

AU - Lo Meo, S.

AU - Losito, R.

AU - Mallick, A.

AU - Manousos, A.

AU - Marganiec, J.

AU - Martínez, T.

AU - Mastinu, P.F.

AU - Mastromarco, M.

AU - Mendoza, E.

AU - Mengoni, A.

AU - Milazzo, P.M.

AU - Mingrone, F.

AU - Mirea, M.

AU - Mondelaers, W.

AU - Musumarra, A.

AU - Paradela, C.

AU - Pavlik, A.

AU - Perkowski, J.

AU - Pignatari, M.

AU - Piersanti, L.

AU - Plompen, A.

AU - Praena, J.

AU - Quesada, J.M.

AU - Rauscher, T.

AU - Reifarth, R.

AU - Riego, A.

AU - Robles, M.S.

AU - Rubbia, C.

AU - Sabaté-Gilarte, M.

AU - Sarmento, R.

AU - Saxena, A.

AU - Schillebeeckx, P.

AU - Schmidt, S.

AU - Schumann, D.

AU - Tagliente, G.

AU - Tain, J.L.

AU - Tarrío, D.

AU - Tassan-Got, L.

AU - Tsinganis, A.

AU - Valenta, S.

AU - Vannini, G.

AU - Van Rijs, I.

AU - Variale, V.

AU - Vaz, P.

AU - Ventura, A.

AU - Vermeulen, M.J.

AU - Vlachoudis, V.

AU - Vlastou, R.

AU - Wallner, A.

AU - Ware, T.

AU - Weigand, M.

AU - Weiß, C.

AU - Wynants, R.

AU - Wright, T.

AU - Žugec, P.

N1 - This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. Open Access funded by SCOAP³ - Sponsoring Consortium for Open Access Publishing in Particle Physics. C. Massimi, et al, 'Neuron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne (a,n) 25Mg', Physics Letters B, Vol. 768, first published online 16 February 2017. The version of record is available online at doi: http://dx.doi.org/10.1016/j.physletb.2017.02.025 © 2017 The Authors. Published by Elsevier B. V.

PY - 2017/5/10

Y1 - 2017/5/10

N2 - This work reports on accurate, high-resolution measurements of the 25Mg(n,γ)26Mg and 25Mg(n,tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25Mg(n,γ)26Mg parametrization. The relevant resonances for n+25Mg were characterized from a combined R-matrix analysis of the experimental data. This resulted in an unambiguous spin/parity assignment of the corresponding excited states in 26Mg. With this information experimental upper limits of the reaction rates for 22Ne(α,n)25Mg and 22Ne(α,γ)26Mg were established, potentially leading to a significantly higher (α,n)/(α,γ) ratio than previously evaluated. The impact of these results has been studied for stellar models in the mass range 2 to 25 M⊙.

AB - This work reports on accurate, high-resolution measurements of the 25Mg(n,γ)26Mg and 25Mg(n,tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25Mg(n,γ)26Mg parametrization. The relevant resonances for n+25Mg were characterized from a combined R-matrix analysis of the experimental data. This resulted in an unambiguous spin/parity assignment of the corresponding excited states in 26Mg. With this information experimental upper limits of the reaction rates for 22Ne(α,n)25Mg and 22Ne(α,γ)26Mg were established, potentially leading to a significantly higher (α,n)/(α,γ) ratio than previously evaluated. The impact of these results has been studied for stellar models in the mass range 2 to 25 M⊙.

KW - s Process

KW - α + 22 Ne

KW - Neutron spectroscopy

U2 - 10.1016/j.physletb.2017.02.025

DO - 10.1016/j.physletb.2017.02.025

M3 - Letter

SN - 0370-2693

VL - 768

SP - 1

EP - 6

JO - Physics Letters B

JF - Physics Letters B

ER -

Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg

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Keywords

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