Massimi, C., Altstadt, S., Andrzejewski, J. et al. (113 more authors) (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. pp. 1-6. ISSN 0370-2693
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⊙.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2017 The Author(s). |
Keywords: | Neutron spectroscopy,s Process,α+Ne |
Dates: |
|
Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 26 Apr 2017 11:40 |
Last Modified: | 16 Oct 2024 13:44 |
Published Version: | https://doi.org/10.1016/j.physletb.2017.02.025 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1016/j.physletb.2017.02.025 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:115675 |
Download
Filename: 1_s2.0_S0370269317301260_main.pdf
Description: Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n) 25Mg
Licence: CC-BY 2.5