Physics Letters B (May 2017)
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
Affiliations
- C. Massimi
- Istituto Nazionale di Fisica Nucleare, Bologna, Italy
- S. Altstadt
- Johann-Wolfgang-Goethe Universität, Frankfurt, Germany
- J. Andrzejewski
- Uniwersytet Łódzki, Lodz, Poland
- L. Audouin
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud et Paris-Saclay, 91406 Orsay Cedex, France
- M. Barbagallo
- Istituto Nazionale di Fisica Nucleare, Bari, Italy
- V. Bécares
- Centro de Investigaciones Energeticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- F. Bečvář
- Charles University, Prague, Czechia
- F. Belloni
- Commissariat à l'Énergie Atomique (CEA) Saclay - Irfu, Gif-sur-Yvette, France
- E. Berthoumieux
- Commissariat à l'Énergie Atomique (CEA) Saclay - Irfu, Gif-sur-Yvette, France
- J. Billowes
- University of Manchester, Oxford Road, Manchester, UK
- S. Bisterzo
- INAF - Osservatorio astrofisico di Torino, Torino, Italy
- D. Bosnar
- Department of Physics, Faculty of Science, University of Zagreb, Croatia
- M. Brugger
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- M. Calviani
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- F. Calviño
- Universitat Politecnica de Catalunya, Barcelona, Spain
- D. Cano-Ott
- Centro de Investigaciones Energeticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- C. Carrapiço
- Instituto Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Lisboa, Portugal
- D.M. Castelluccio
- Istituto Nazionale di Fisica Nucleare, Bologna, Italy
- F. Cerutti
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- E. Chiaveri
- Commissariat à l'Énergie Atomique (CEA) Saclay - Irfu, Gif-sur-Yvette, France
- L. Cosentino
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Italy
- M. Chin
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- G. Clai
- Istituto Nazionale di Fisica Nucleare, Bologna, Italy
- N. Colonna
- Istituto Nazionale di Fisica Nucleare, Bari, Italy
- G. Cortés
- Universitat Politecnica de Catalunya, Barcelona, Spain
- M.A. Cortés-Giraldo
- Universidad de Sevilla, Spain
- S. Cristallo
- INAF - Osservatorio Astronomico di Collurania, Teramo, Italy
- M. Diakaki
- National Technical University of Athens (NTUA), Greece
- C. Domingo-Pardo
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, Spain
- I. Duran
- Universidade de Santiago de Compostela, Spain
- R. Dressler
- Paul Scherrer Institut, Villigen PSI, Switzerland
- C. Eleftheriadis
- Aristotle University of Thessaloniki, Thessaloniki, Greece
- A. Ferrari
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- P. Finocchiaro
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Italy
- K. Fraval
- Commissariat à l'Énergie Atomique (CEA) Saclay - Irfu, Gif-sur-Yvette, France
- S. Ganesan
- Bhabha Atomic Research Centre (BARC), Mumbai, India
- A.R. García
- Centro de Investigaciones Energeticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- G. Giubrone
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, Spain
- I.F. Gonçalves
- Instituto Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Lisboa, Portugal
- E. González-Romero
- Centro de Investigaciones Energeticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- E. Griesmayer
- Atominstitut, Technische Universität Wien, Austria
- C. Guerrero
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- F. Gunsing
- Commissariat à l'Énergie Atomique (CEA) Saclay - Irfu, Gif-sur-Yvette, France
- A. Hernández-Prieto
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- D.G. Jenkins
- University of York, Heslington, York, UK
- E. Jericha
- Atominstitut, Technische Universität Wien, Austria
- Y. Kadi
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- F. Käppeler
- Karlsruhe Institute of Technology, Campus Nord, Institut für Kernphysik, Karlsruhe, Germany
- D. Karadimos
- National Technical University of Athens (NTUA), Greece
- N. Kivel
- Paul Scherrer Institut, Villigen PSI, Switzerland
- P. Koehler
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
- M. Kokkoris
- National Technical University of Athens (NTUA), Greece
- S. Kopecky
- European Commission JRC, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel, Belgium
- M. Krtička
- Charles University, Prague, Czechia
- J. Kroll
- Charles University, Prague, Czechia
- C. Lampoudis
- Commissariat à l'Énergie Atomique (CEA) Saclay - Irfu, Gif-sur-Yvette, France
- C. Langer
- Johann-Wolfgang-Goethe Universität, Frankfurt, Germany
- E. Leal-Cidoncha
- Universidade de Santiago de Compostela, Spain
- C. Lederer
- University of Vienna, Faculty of Physics, Austria
- H. Leeb
- Atominstitut, Technische Universität Wien, Austria
- L.S. Leong
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud et Paris-Saclay, 91406 Orsay Cedex, France
- S. Lo Meo
- Istituto Nazionale di Fisica Nucleare, Bologna, Italy
- R. Losito
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- A. Mallick
- Bhabha Atomic Research Centre (BARC), Mumbai, India
- A. Manousos
- Aristotle University of Thessaloniki, Thessaloniki, Greece
- J. Marganiec
- Uniwersytet Łódzki, Lodz, Poland
- T. Martínez
- Centro de Investigaciones Energeticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- P.F. Mastinu
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Italy
- M. Mastromarco
- Istituto Nazionale di Fisica Nucleare, Bari, Italy
- E. Mendoza
- Centro de Investigaciones Energeticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- A. Mengoni
- Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile (ENEA), Bologna, Italy
- P.M. Milazzo
- Istituto Nazionale di Fisica Nucleare, Trieste, Italy
- F. Mingrone
- Istituto Nazionale di Fisica Nucleare, Bologna, Italy
- M. Mirea
- Horia Hulubei National Institute of Physics and Nuclear Engineering - IFIN HH, Bucharest - Magurele, Romania
- W. Mondelaers
- European Commission JRC, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel, Belgium
- A. Musumarra
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Italy
- C. Paradela
- Universidade de Santiago de Compostela, Spain
- A. Pavlik
- University of Vienna, Faculty of Physics, Austria
- J. Perkowski
- Uniwersytet Łódzki, Lodz, Poland
- M. Pignatari
- E. A. Milne Centre for Astrophysics, Dept. of Physics & Mathematics, University of Hull, United Kingdom
- L. Piersanti
- INAF - Osservatorio Astronomico di Collurania, Teramo, Italy
- A. Plompen
- European Commission JRC, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel, Belgium
- J. Praena
- Universidad de Sevilla, Spain
- J.M. Quesada
- Universidad de Sevilla, Spain
- T. Rauscher
- Department of Physics - University of Basel, Basel, Switzerland
- R. Reifarth
- Johann-Wolfgang-Goethe Universität, Frankfurt, Germany
- A. Riego
- Universitat Politecnica de Catalunya, Barcelona, Spain
- M.S. Robles
- Universidade de Santiago de Compostela, Spain
- C. Rubbia
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- M. Sabaté-Gilarte
- Universidad de Sevilla, Spain
- R. Sarmento
- Instituto Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Lisboa, Portugal
- A. Saxena
- Bhabha Atomic Research Centre (BARC), Mumbai, India
- P. Schillebeeckx
- European Commission JRC, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel, Belgium
- S. Schmidt
- Johann-Wolfgang-Goethe Universität, Frankfurt, Germany
- D. Schumann
- Paul Scherrer Institut, Villigen PSI, Switzerland
- G. Tagliente
- Istituto Nazionale di Fisica Nucleare, Bari, Italy
- J.L. Tain
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, Spain
- D. Tarrío
- Universidade de Santiago de Compostela, Spain
- L. Tassan-Got
- Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud et Paris-Saclay, 91406 Orsay Cedex, France
- A. Tsinganis
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- S. Valenta
- Charles University, Prague, Czechia
- G. Vannini
- Istituto Nazionale di Fisica Nucleare, Bologna, Italy
- I. Van Rijs
- Department of Physics - University of Basel, Basel, Switzerland
- V. Variale
- Istituto Nazionale di Fisica Nucleare, Bari, Italy
- P. Vaz
- Instituto Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Lisboa, Portugal
- A. Ventura
- Istituto Nazionale di Fisica Nucleare, Bologna, Italy
- M.J. Vermeulen
- University of York, Heslington, York, UK
- V. Vlachoudis
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
- R. Vlastou
- National Technical University of Athens (NTUA), Greece
- A. Wallner
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, Australia
- T. Ware
- University of Manchester, Oxford Road, Manchester, UK
- M. Weigand
- Johann-Wolfgang-Goethe Universität, Frankfurt, Germany
- C. Weiß
- Atominstitut, Technische Universität Wien, Austria
- R. Wynants
- European Commission JRC, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel, Belgium
- T. Wright
- University of Manchester, Oxford Road, Manchester, UK
- P. Žugec
- Department of Physics, Faculty of Science, University of Zagreb, Croatia
- DOI
- https://doi.org/10.1016/j.physletb.2017.02.025
- Journal volume & issue
-
Vol. 768,
no. C
pp. 1 – 6
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
