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DOI | 10.1126/science.aax5921 |
Quantum-state-selective electron recombination studies suggest enhanced abundance of primordial HeH+ | |
Novotny, Oldrich1; Wilhelm, Patrick1; Paul, Daniel1; Kalosi, Abel1,2; Saurabh, Sunny1; Becker, Arno1; Blaum, Klaus1; George, Sebastian1,3; Goeck, Juergen1; Grieser, Manfred1; Grussie, Florian1; von Hahn, Robert1; Krantz, Claude1; Kreckel, Holger1; Meyer, Christian1; Mishra, Preeti M.1; Muell, Damian1; Nuesslein, Felix1; Orlov, Dmitry A.1; Rimmler, Marius1; Schmidt, Viviane C.1; Shornikov, Andrey1; Terekhov, Aleksandr S.4; Vogel, Stephen1; Zajfman, Daniel5; Wolf, Andreas1 | |
2019-08-16 | |
发表期刊 | SCIENCE
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ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2019 |
卷号 | 365期号:6454页码:676-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Czech Republic; Russia; Israel |
英文摘要 | The epoch of first star formation in the early Universe was dominated by simple atomic and molecular species consisting mainly of two elements: hydrogen and helium. Gaining insight into this constitutive era requires a thorough understanding of molecular reactivity under primordial conditions. We used a cryogenic ion storage ring combined with a merged electron beam to measure state-specific rate coefficients of dissociative recombination, a process by which electrons destroy molecular ions. We found a pronounced decrease of the electron recombination rates for the lowest rotational states of the helium hydride ion (HeH+), compared with previous measurements at room temperature. The reduced destruction of cold HeH+ translates into an enhanced abundance of this primordial molecule at redshifts of first star and galaxy formation. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481688700043 |
WOS关键词 | DISSOCIATIVE RECOMBINATION ; CHEMISTRY ; DISTRIBUTIONS ; EXCITATION |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/202083 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany; 2.Charles Univ Prague, Fac Math & Phys, CR-18000 Prague, Czech Republic; 3.Ernst Moritz Arndt Univ Greifswald, Inst Phys, D-17487 Greifswald, Germany; 4.Rzhanov Inst Semicond Phys, Novosibirsk 630090, Russia; 5.Weizmann Inst Sci, IL-76100 Rehovot, Israel |
推荐引用方式 GB/T 7714 | Novotny, Oldrich,Wilhelm, Patrick,Paul, Daniel,et al. Quantum-state-selective electron recombination studies suggest enhanced abundance of primordial HeH+[J]. SCIENCE,2019,365(6454):676-+. |
APA | Novotny, Oldrich.,Wilhelm, Patrick.,Paul, Daniel.,Kalosi, Abel.,Saurabh, Sunny.,...&Wolf, Andreas.(2019).Quantum-state-selective electron recombination studies suggest enhanced abundance of primordial HeH+.SCIENCE,365(6454),676-+. |
MLA | Novotny, Oldrich,et al."Quantum-state-selective electron recombination studies suggest enhanced abundance of primordial HeH+".SCIENCE 365.6454(2019):676-+. |
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