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

Kivel, N.; Karadimos, D.; Käppeler, F.; Kadi, Y.; Krti?ka, M.; Kopecky, S.; Kokkoris, M.; Koehler, P.; Leal-Cidoncha, E.; Langer, C.; Lampoudis, C.; Kroll, J.; Losito, R.; Lo Meo, S.; Leeb, H.; Lederer, C.; Mastromarco, M.; Martínez, T.; Marganiec, J.; Manousos, A.; Mallick, A.; Musumarra, A.; Mondelaers, W.; Mirea, M.; Mingrone, F.; Mengoni, A.; Mendoza, E.; Praena, J.; Plompen, A.; Piersanti, L.; Pignatari, M.; Perkowski, J.; Pavlik, A.; Paradela, C.; Schillebeeckx, P.; Saxena, A.; Sarmento, R.; Sabaté-Gilarte, M.; Rubbia, C.; Riego, A.; Reifarth, R.; Rauscher, T.; Žugec, P.; Wright, T.; Wynants, R.; Weiß, C.; Weigand, M.; Ware, T.; Wallner, A.; Vlastou, R.; Vlachoudis, V.; Vermeulen, M.J.; Ventura, A.; Vaz, P.; Variale, V.; Van Rijs, I.; Vannini, G.; Valenta, S.; 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.;...

Authors

N. Kivel

D. Karadimos

F. Käppeler

Y. Kadi

M. Krti?ka

S. Kopecky

M. Kokkoris

P. Koehler

E. Leal-Cidoncha

C. Langer

C. Lampoudis

J. Kroll

R. Losito

S. Lo Meo

H. Leeb

C. Lederer

M. Mastromarco

T. Martínez

J. Marganiec

A. Manousos

A. Mallick

A. Musumarra

W. Mondelaers

M. Mirea

F. Mingrone

A. Mengoni

E. Mendoza

J. Praena

A. Plompen

L. Piersanti

M. Pignatari

J. Perkowski

A. Pavlik

C. Paradela

P. Schillebeeckx

A. Saxena

R. Sarmento

M. Sabaté-Gilarte

C. Rubbia

A. Riego

R. Reifarth

T. Rauscher

P. Žugec

T. Wright

R. Wynants

C. Weiß

M. Weigand

T. Ware

A. Wallner

R. Vlastou

V. Vlachoudis

M.J. Vermeulen

A. Ventura

P. Vaz

V. Variale

I. Van Rijs

G. Vannini

S. Valenta

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. Krti?ka

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



Abstract

This work reports on accurate, high-resolution measurements of the 25 Mg(n,γ) 26 Mg and 25 Mg(n,tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25 Mg(n,γ) 26 Mg parametrization. The relevant resonances for n+ 25 Mg 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 26 Mg. With this information experimental upper limits of the reaction rates for 22 Ne(α,n) 25 Mg and 22 Ne(α,γ) 26 Mg 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 ⊙ .

Citation

Kivel, N., Karadimos, D., Käppeler, F., Kadi, Y., Krtička, M., Kopecky, S., …Schillebeeckx, P. (2017). Neutron spectroscopy of 26 Mg states: Constraining the stellar neutron source 22 Ne( α , n ) 25 Mg. Physics letters. B, 768, 1-6. https://doi.org/10.1016/j.physletb.2017.02.025

Journal Article Type Article
Acceptance Date Feb 12, 2017
Online Publication Date Feb 16, 2017
Publication Date May 10, 2017
Deposit Date Jun 28, 2018
Publicly Available Date Mar 28, 2024
Journal Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Print ISSN 0370-2693
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 768
Pages 1-6
DOI https://doi.org/10.1016/j.physletb.2017.02.025
Keywords s Process; α+²²Ne; Neutron spectroscopy
Public URL https://hull-repository.worktribe.com/output/556659
Publisher URL https://www.sciencedirect.com/science/article/pii/S0370269317301260
Related Public URLs http://eprints.whiterose.ac.uk/115675/

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