دورية أكاديمية
β-delayed γ decay of 20Mg and the Ne19(p,γ)20Na breakout reaction in Type I X-ray bursts
| العنوان: | β-delayed γ decay of 20Mg and the Ne19(p,γ)20Na breakout reaction in Type I X-ray bursts |
|---|---|
| المؤلفون: | B.E. Glassman, D. Pérez-Loureiro, C. Wrede, J. Allen, D.W. Bardayan, M.B. Bennett, B.A. Brown, K.A. Chipps, M. Febbraro, M. Friedman, C. Fry, M.R. Hall, O. Hall, S.N. Liddick, P. O'Malley, W.J. Ong, S.D. Pain, C. Prokop, S.B. Schwartz, P. Shidling, H. Sims, P. Thompson, H. Zhang |
| المصدر: | Physics Letters B, Vol 778, Iss C, Pp 397-402 (2018) |
| بيانات النشر: | Elsevier, 2018. |
| سنة النشر: | 2018 |
| المجموعة: | LCC:Physics |
| مصطلحات موضوعية: | Hot CNO cycle breakout, X-ray burst, β delayed γ decay, Physics, QC1-999 |
| الوصف: | Certain astrophysical environments such as thermonuclear outbursts on accreting neutron stars (Type-I X-ray bursts) are hot enough to allow for breakout from the Hot CNO hydrogen burning cycles to the rapid proton capture (rp) process. An important breakout reaction sequence is 15O(α,γ)19Ne(p,γ)20Na and the 19Ne(p,γ)20Na reaction rate is expected to be dominated by a single resonance at 457 keV above the proton threshold in 20Na. The resonance strength and, hence, reaction rate depends strongly on whether this 20Na state at an excitation energy of 2647 keV has spin and parity of 1+ or 3+. Previous 20Mg (Jπ=0+) β+ decay experiments have relied almost entirely on searches for β-delayed proton emission from this resonance in 20Na to limit the log ft value and, hence, Jπ. However there is a non-negligible γ-ray branch expected that must also be limited experimentally to determine the log ft value and constrain Jπ. We have measured the β-delayed γ decay of 20Mg to complement previous β-delayed proton decay work and provide the first complete limit based on all energetically allowed decay channels through the 2647 keV state. Our limit confirms that a 1+ assignment for this state is highly unlikely. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0370-2693 1873-2445 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S0370269318300492; https://doaj.org/toc/0370-2693; https://doaj.org/toc/1873-2445 |
| DOI: | 10.1016/j.physletb.2018.01.041 |
| URL الوصول: | https://doaj.org/article/e8bee7d0ec134f36ab782be2c1c7be3a |
| رقم الأكسشن: | edsdoj.8bee7d0ec134f36ab782be2c1c7be3a |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 03702693 18732445 |
|---|---|
| DOI: | 10.1016/j.physletb.2018.01.041 |