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Title: Structure of resonances in the Gamow burning window for the Al 25 ( p , γ ) Si 26 reaction in novae

Abstract

A -ray spectroscopy study of excited states in 26Si has been performed using the 24Mg(3He,n) reaction at a beam energy of 10 MeV. In particular, states have been studied above the proton threshold relevant for burning in the 25Al(p, )26Si reaction in novae. This reaction in uences the amount of 26Al injected into the interstellar medium by novae, which contributes to the overall ux of cosmic gamma-ray emission from 26Al observed in satellite missions. The present results point strongly to the existence of a 0+ state at an excitation energy of 5890 keV lying within the Gamow burning window, which raises questions about the existence and properties of another, higher-lying state/resonance reported in previous experimental work. The existence of two such states within this excitation energy region cannot be understood in the framework of sd shell-model calculations.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Nuclear Physics
OSTI Identifier:
1391898
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 3; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Doherty, D. T., Woods, P. J., Seweryniak, D., Albers, M., Ayangeakaa, A. D., Carpenter, M. P., Chiara, C. J., David, H. M., Harker, J. L., Janssens, R. V. F., Kankainen, A., Lederer, C., and Zhu, S. Structure of resonances in the Gamow burning window for the Al25(p,γ)Si26 reaction in novae. United States: N. p., 2015. Web. doi:10.1103/PhysRevC.92.035808.
Doherty, D. T., Woods, P. J., Seweryniak, D., Albers, M., Ayangeakaa, A. D., Carpenter, M. P., Chiara, C. J., David, H. M., Harker, J. L., Janssens, R. V. F., Kankainen, A., Lederer, C., & Zhu, S. Structure of resonances in the Gamow burning window for the Al25(p,γ)Si26 reaction in novae. United States. doi:10.1103/PhysRevC.92.035808.
Doherty, D. T., Woods, P. J., Seweryniak, D., Albers, M., Ayangeakaa, A. D., Carpenter, M. P., Chiara, C. J., David, H. M., Harker, J. L., Janssens, R. V. F., Kankainen, A., Lederer, C., and Zhu, S. Tue . "Structure of resonances in the Gamow burning window for the Al25(p,γ)Si26 reaction in novae". United States. doi:10.1103/PhysRevC.92.035808.
@article{osti_1391898,
title = {Structure of resonances in the Gamow burning window for the Al25(p,γ)Si26 reaction in novae},
author = {Doherty, D. T. and Woods, P. J. and Seweryniak, D. and Albers, M. and Ayangeakaa, A. D. and Carpenter, M. P. and Chiara, C. J. and David, H. M. and Harker, J. L. and Janssens, R. V. F. and Kankainen, A. and Lederer, C. and Zhu, S.},
abstractNote = {A -ray spectroscopy study of excited states in 26Si has been performed using the 24Mg(3He,n) reaction at a beam energy of 10 MeV. In particular, states have been studied above the proton threshold relevant for burning in the 25Al(p, )26Si reaction in novae. This reaction in uences the amount of 26Al injected into the interstellar medium by novae, which contributes to the overall ux of cosmic gamma-ray emission from 26Al observed in satellite missions. The present results point strongly to the existence of a 0+ state at an excitation energy of 5890 keV lying within the Gamow burning window, which raises questions about the existence and properties of another, higher-lying state/resonance reported in previous experimental work. The existence of two such states within this excitation energy region cannot be understood in the framework of sd shell-model calculations.},
doi = {10.1103/PhysRevC.92.035808},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 3,
volume = 92,
place = {United States},
year = {2015},
month = {9}
}

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