论文标题
从$^{10} $ be/$^9 $ be data的光环大小$ l $的简单确定
A simple determination of the halo size $L$ from $^{10}$Be/$^9$Be data
论文作者
论文摘要
AMS-02和Helix实验应很快提供$ \ mathrm {^{10} BE/^9BE} $ cosmic-ray的前所未有的精度。我们提出了一个分析公式，以快速准确地从这些数据中确定$ L $。我们的公式通过使用传播代码\ usine {}执行的完整计算进行验证。我们比较BE/B和$ \ Mathrm {^{10} Be/^9BE} $的$ L $的约束，依赖于更新的生产跨段集。使用更新的横截面时，来自AMS-02 BE/B数据的最佳拟合$ L $从5 kpc转移到3.8 kpc。我们通过用户分析获得了一致的结果，$ l = 3.8^{+2.8} _ { - 1.6} $ kpc（数据和横截面不确定性），以及$ \ mathrm {^^{10} be/^9be be/^9be be be/^be be/^9Be} $ data具有简化的公式，$ l = 4.7 \ pm0.6 $（$ \ pm0.6 $）（$ \ pm0.6 $）（$ \ pm0.6 $）不确定性）KPC。分析公式表明，$ l $的改进将受到生产横截面的不确定性的限制，除非$ \ mathrm {^{^{10} be/^9be} $测量值最多可扩展到几十万/n的核数据，或者用于生产$ \ mathrm {^10} $ {^10} $} $ { $ \ mathrm {^{16} o} $在几个GEV/N以上的同位素的生产横截面的新数据是特别需要的。
The AMS-02 and HELIX experiments should soon provide $\mathrm{^{10}Be/^9Be}$ cosmic-ray data of unprecedented precision. We propose an analytical formula to quickly and accurately determine $L$ from these data. Our formula is validated against the full calculation performed with the propagation code \usine{}. We compare the constraints on $L$ set by Be/B and $\mathrm{^{10}Be/^9Be}$, relying on updated sets of production cross-sections. The best-fit $L$ from AMS-02 Be/B data is shifted from 5 kpc to 3.8 kpc when using the updated cross-sections. We obtained consistent results from the Be/B analysis with USINE, $L=3.8^{+2.8}_{-1.6}$ kpc (data and cross-section uncertainties), and from the analysis of $\mathrm{^{10}Be/^9Be}$ data with the simplified formula, $L=4.7\pm0.6$ (data uncertainties) $\pm2$ (cross-section uncertainties) kpc. The analytical formula indicates that improvements on $L$ thanks to future data will be limited by production cross-section uncertainties, unless either $\mathrm{^{10}Be/^9Be}$ measurements are extended up to several tens of GeV/n, or nuclear data for the production of $\mathrm{^{10}Be}$ and $\mathrm{^9Be}$ are improved; new data for the production cross-section of $\mathrm{^{16}O}$ into Be isotopes above a few GeV/n are especially desired.
