The breakout reaction $^{15}$O($α,γ$)$^{19}$Ne, which regulates the flow between the hot CNO cycle and the rp-process, is critical for the explanation of the burst amplitude and periodicity of X-ray bursters. We report on the first successful measurement of the critical $α$-decay branching ratios of relevant states in $^{19}$Ne populated via $^{19}$F($^3$He,t)$^{19}$Ne. Based on the experimental results and our previous lifetime measurements of these states, we derive the first experimental rate of $^{15}$O($α,γ$)$^{19}$Ne. The impact of our experimental results on the burst pattern and periodicity for a range of accretion rates is analyzed.
The 18Ne(a,p)21Na breakout reaction in x-ray bursts: experimental determination of spin-parities for alpha resonances in 22Mg via resonant elastic scattering of 21Na+p
The Regulated GeAs Cycles with the New $^{63}$Ga(p,$γ$)$^{64}$Ge and $^{64}$Ge(p,$γ$)$^{65}$As Reaction Rates and Their Impact on the GS 1826$-$24 Clocked Bursts and SAX J1808.4$-$3658 Photospheric Radius Expansion Bursts
Zhejiang Sci-Tech University(浙江理工大学);RIKEN(理化学研究所);Lanzhou University(兰州大学);Monash University(蒙纳士大学);University of Bonn(波恩大学);Michigan State University(密歇根州立大学);the University of Tokyo(东京大学);National Astronomical Observatory of Japan(日本国立天文台)
Examination and experimental constraints of the stellar reaction rate factor $N_A < σv >$ of the $^{18}$Ne($α$,$p$)$^{21}$Na reaction at temperatures of X-Ray Bursts
Extreme Light Infrastructure - Nuclear Physics (ELI-NP)(极端光基础设施-核物理研究所);"Horia Hulubei" National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)(霍里亚·胡鲁贝伊国家物理与核工程研发研究所);Facility for Rare Isotope Beams, Michigan State University(密歇根州立大学稀有同位素束设施);Department of Physics and Astronomy, Michigan State University(密歇根州立大学物理与天文学系);HKU SPACE PO LEUNG KUK STANLEY HO COMMUNITY COLLEGE(香港大学专业进修学院宝乐群基 Stanley Ho 社区学院);Department of Engineering Physics, Air Force Institute of Technology(空军理工学院工程物理系);HUN-REN Institute for Nuclear Research (ATOMKI)(匈牙利研究与创新网络核物理研究所)
The Impact of the New $^{65\!}$As(p,$γ$)$^{66\!}$Se Reaction Rate on the Two-Proton Sequential Capture of $^{64}\!$Ge, Weak GeAs Cycles, and Type-I X-Ray Bursts such as the Clocked Burster GS 1826$-$24
Investigation of excited states in $^{18}$Ne via resonant elastic scattering of $^{17}$F+p and its astrophysical implication in the stellar reaction of $^{14}$O($α$,$p$)$^{17}$F
New measurement of the $E_{\mathrm{c.m.}}=323$ keV resonance in the $^{19}$F$($p,γ$)$^{20}$Ne reaction
在低于0.1 GK的温度下,$^{19}$ F $(p,γ)^{20}$ Ne反应是CNO循环的唯一突破路径。由于来自强得多的$^{19}$ F $(p,α)^{16}$ O反应通道的丰富的$γ$射线背景,从技术角度来看,该反应的实验研究是具有挑战性的。在这里,我们提出了第一个逆运动学研究的$^{19}$ F $(p,γ)^{20}$ Ne反应,在其中,我们测量的323 keV共振的强度。我们发现一个强度值为$ωγ= 3.3^{+1.1}_{-0.9}$毫电子伏,这是一个比最近的研究大两个因素。这种差异很可能是由于直接到基态的过渡,以前的研究并不敏感。我们还观察到过渡到第一个$2^{-}$状态,这在以前的研究中没有观察到这种共振。计算了一个新的热核反应速率,并与文献进行了比较。
Evaluation of the $^{35}$K($p$,$γ$)$^{36}$Ca reaction rate using the $^{37}$Ca($p$,$d$)$^{36}$Ca transfer reaction
最近的一项灵敏度研究表明,$^{35}$ K $(p,γ)^{36}$ Ca反应是十种$(p,γ)$反应速率之一,可能会显著影响计算出的X射线爆发光变曲线的形状。在这项工作中,我们建议重新调查的$^{35}$ K $(p,γ)^{36}$钙反应速率,以及相关的不确定性,通过确定的能量和衰减分支比的$^{36}$钙水平,在伽莫夫窗口内,在0.5至2 GK的X射线暴温度范围内。使用48 MeV核子$^{-1}$的$^{37}$ Ca放射性束,使用逆运动学中的单中子拾取转移反应$^{37}$ Ca $(p,d)^{36}$ Ca研究了这些性质。在GANIL进行的实验使用了液氢靶MIPTA,MUST2探测器阵列用于探测轻带电粒子,零度探测系统用于探测出射重离子。$^{36}$钙的原子质量得到确认,并提出了新的共振及其质子衰变分支比。该光谱信息与最近对PDMATHAMT宽度的理论预测结合使用,用于计算$^{35}$ K $(p,γ)^{36}$ Ca反应速率.本工作的推荐速率是在1 σ的不确定因子2内获得的。这是一致的,与以前的估计在X射线爆发的温度范围。由于两个新发现的共振,在较高的温度下发现的反应速率的大幅度增加。$^{35}$ K $(p,γ)^{36}$ Ca热核反应速率现在很好地限制了目前的工作在一个广泛的温度范围内。我们的研究结果表明,$^{35}$ K $(p,γ)^{36}$…
Advancement of Photospheric Radius Expansion and Clocked Type-I X-Ray Burst Models with the New $^{22}$Mg$(α,p)^{25}$Al Reaction Rate Determined at Gamow Energy
Study of the $in ^{34}$Ar($α,p$)$^{37}$K reaction rate via proton scattering on $^{37}$K, and its impact on properties of modeled X-Ray bursts
Savannah River National Laboratory(萨凡纳河国家实验室);Louisiana State University(路易斯安那州立大学);Center for Exotic Nuclear Studies, Institute for Basic Science(基础科学研究院 exotic核研究中心);Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University(密歇根州立大学物理与天文学系及国家超导回旋加速器实验室);Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory(劳伦斯利弗莫尔国家实验室核与化学科学部);Physics Department, Florida State University(佛罗里达州立大学物理系);Cyclotron Institute, Texas A&M University(德克萨斯农工大学回旋加速器研究所);Physics Division, Oak Ridge National Laboratory(橡树岭国家实验室物理部);Department of Physics and Astronomy, University of Tennessee(田纳西大学物理与天文学系)
Direct measurement of $^{59}$Cu($p$,$α$)$^{56}$Ni precludes a strong NiCu cycle in Type-I X-ray bursts
Astronomy and Physics Department, Saint Mary’s University(圣玛丽大学天文与物理系);TRIUMF(特里厄姆夫实验室);Department of Physics and Astronomy, Mississippi State University(密西西比州立大学物理与天文学系);Department of Physics, University of Notre Dame(圣母大学物理系);Department of Chemistry, Simon Fraser University(西蒙弗雷泽大学化学系);Department of Physics, Simon Fraser University(西蒙弗雷泽大学物理系)