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. ChiaveriL. 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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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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, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	768
DOIs	https://doi.org/10.1016/j.physletb.2017.02.025
Publication status	Published - 10 May 2017

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10.1016/j.physletb.2017.02.025

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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, Section B: Nuclear, Elementary Particle and High-Energy Physics, 768, 1-6. https://doi.org/10.1016/j.physletb.2017.02.025

@article{af1a8cfaf4424882ae593d4825836ecf,

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

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 Castelluccio, {D. M.} and F. Cerutti and E. Chiaveri and L. Cosentino and M. Chin and G. Clai and N. Colonna and G. Cort{\'e}s and Cort{\'e}s-Giraldo, {M. A.} 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 Garc{\'i}a, {A. R.} and G. Giubrone and Gon{\c c}alves, {I. F.} and E. Gonz{\'a}lez-Romero and E. Griesmayer and C. Guerrero and F. Gunsing and A. Hern{\'a}ndez-Prieto and Jenkins, {D. G.} 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 Leong, {L. S.} and {Lo Meo}, S. and R. Losito and A. Mallick and A. Manousos and J. Marganiec and T. Mart{\'i}nez and Mastinu, {P. F.} and M. Mastromarco and E. Mendoza and A. Mengoni and Milazzo, {P. M.} 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 Quesada, {J. M.} and T. Rauscher and R. Reifarth and A. Riego and Robles, {M. S.} 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 Tain, {J. L.} 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 Vermeulen, {M. J.} 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 = "Publisher Copyright: {\textcopyright} 2017 The Author(s)",

year = "2017",

month = may,

day = "10",

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

language = "English",

volume = "768",

pages = "1--6",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

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, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 768, pp. 1-6. https://doi.org/10.1016/j.physletb.2017.02.025

TY - JOUR

T1 - Neutron spectroscopy of 26Mg states

T2 - 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.

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 - Neutron spectroscopy

KW - s Process

KW - α+Ne

UR - http://www.scopus.com/inward/record.url?scp=85013801903&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2017.02.025

DO - 10.1016/j.physletb.2017.02.025

M3 - Article

SN - 0370-2693

VL - 768

SP - 1

EP - 6

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

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

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