First proton-transfer study of 18F+p resonances relevant for novae
First proton-transfer study of 18F+p resonances relevant for novae
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首次对与新星相关的 18F p 共振进行质子转移研究
DOI：
10.1103/physrevc.83.052801
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发表时间：
2011
影响因子：
3.1
通讯作者：
A. Voinov
中科院分区：
文献类型：
--
作者：
A. Adekola;D. Bardayan;J. Blackmon;C. Brune;K. Chae;C. Domizioli;U. Greife;Z. Heinen;M. Hornish;K. Jones;R. Kozub;R. Livesay;Zhanwen Ma;T. Massey;B. Moazen;C. Nesaraja;S. Pain;J. F. Shriner;N. Smith;M. Smith;J. Thomas;D. Visser;A. Voinov
The {sup 18}F(p,{alpha}){sup 15}O reaction is the predominant destruction mechanism in novae of the radionuclide {sup 18}F, a target of {gamma}-ray observatories. Thus, its rate is important for understanding {sup 18}F production in novae. We have studied resonances in the {sup 18}F+p system by making a measurement of a proton-transfer reaction {sup 18}F(d,n). We have observed 15 {sup 19}Ne levels, 5 of which are below the proton threshold, including a subthreshold state, which has significant l{sub p}=0 strength. Our data provide a direct determination of the spectroscopic strength of these states and new constraints on their spins and parities, thereby resolving a controversy, which involves the 8- and 38-keV resonances. The {sup 18}F(p,{alpha}){sup 15}O reaction rate is reevaluated, which takes the subthreshold resonance and other new information determined in this experiment into account.
The {sup 18}F(p,{alpha}){sup 15}O reaction is the predominant destruction mechanism in novae of the radionuclide {sup 18}F, a target of {gamma}-ray observatories. Thus, its rate is important for understanding {sup 18}F production in novae. We have studied resonances in the {sup 18}F+p system by making a measurement of a proton-transfer reaction {sup 18}F(d,n). We have observed 15 {sup 19}Ne levels, 5 of which are below the proton threshold, including a subthreshold state, which has significant l{sub p}=0 strength. Our data provide a direct determination of the spectroscopic strength of these states and new constraints on their spins and parities, thereby resolving a controversy, which involves the 8- and 38-keV resonances. The {sup 18}F(p,{alpha}){sup 15}O reaction rate is reevaluated, which takes the subthreshold resonance and other new information determined in this experiment into account.