| Mass measurements show slowdown of rapid proton capture process at waiting-point nucleus Ge-64 | |
| 2023-05-01 | |
| Online publication date | 2023-05 |
| Source Publication | Nature Physics Impact Factor & Quartile |
| ISSN | 1745-2473 |
| Volume | 19Issue:8Pages:1091-+ |
| page numbers | 10 |
| Abstract | Rapid proton capture nucleosynthesis stalls at waiting-point nuclides, including Ge-64. Precision mass measurements in the vicinity of this nuclide influence state-of-the-art calculations of X-ray bursts from accreting neutron stars. X-ray bursts are among the brightest stellar objects frequently observed in the sky by space-based telescopes. A type-I X-ray burst is understood as a violent thermonuclear explosion on the surface of a neutron star, accreting matter from a companion star in a binary system. The bursts are powered by a nuclear reaction sequence known as the rapid proton capture process (rp process), which involves hundreds of exotic neutron-deficient nuclides. At so-called waiting-point nuclides, the process stalls until a slower beta(+) decay enables a bypass. One of the handful of rp process waiting-point nuclides is Ge-64, which plays a decisive role in matter flow and therefore the produced X-ray flux. Here we report precision measurements of the masses of Ge-63, As-64,As-65 and Se-66,Se-67-the relevant nuclear masses around the waiting-point Ge-64-and use them as inputs for X-ray burst model calculations. We obtain the X-ray burst light curve to constrain the neutron-star compactness, and suggest that the distance to the X-ray burster GS 1826-24 needs to be increased by about 6.5% to match astronomical observations. The nucleosynthesis results affect the thermal structure of accreting neutron stars, which will subsequently modify the calculations of associated observables. |
| Publisher | NATURE PORTFOLIO |
| DOI | 10.1038/s41567-023-02034-2 |
| Indexed By | SCIE |
| Language | 英语 |
| WOS Research Area | Physics |
| WOS Subject | Physics, Multidisciplinary |
| WOS ID | WOS:000985675700005 |
| Original Document Type | Article ; Early Access |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.lzu.edu.cn/handle/262010/529872 |
| Collection | 兰州大学 |
| Corresponding Author | Wang, M.; Zhang, Y. H.; Litvinov, Yu. A. |
| Affiliation | 1.Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou, Peoples R China; 2.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing, Peoples R China; 3.GSI Helmholtzzentrum Schwerionenforsch, Darmstadt, Germany; 4.Ohio Univ, Inst Nucl & Particle Phys, Dept Phys & Astron, Athens, OH USA; 5.Max Planck Inst Kernphys, Heidelberg, Germany; 6.NuGrid Collaborat, E Lansing, MI USA; 7.Beijing Normal Univ, Coll Nucl Sci & Technol, Key Lab Beam Technol, Minist Educ, Beijing, Peoples R China; 8.Adv Energy Sci & Technol Guangdong Lab, Huizhou, Peoples R China; 9.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou, Peoples R China; 10.Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China; 11.East China Univ Technol, Sch Nucl Sci & Engn, Nanchang, Peoples R China |
| Recommended Citation GB/T 7714 | Zhou, X.,Wang, M.,Zhang, Y. H.,et al. Mass measurements show slowdown of rapid proton capture process at waiting-point nucleus Ge-64[J]. Nature Physics,2023,19(8):1091-+. |
| APA | Zhou, X..,Wang, M..,Zhang, Y. H..,Litvinov, Yu. A..,Meisel, Z..,...&Zhang, S..(2023).Mass measurements show slowdown of rapid proton capture process at waiting-point nucleus Ge-64.Nature Physics,19(8),1091-+. |
| MLA | Zhou, X.,et al."Mass measurements show slowdown of rapid proton capture process at waiting-point nucleus Ge-64".Nature Physics 19.8(2023):1091-+. |
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