Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission
Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission
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使用 DAMPE 太空任务测量 70 GeV 至 80 TeV 的宇宙射线氦能谱
DOI：
10.1103/physrevlett.126.201102
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发表时间：
2021
影响因子：
8.6
通讯作者：
Di Santo M.
中科院分区：
文献类型：
--
作者：
Alemanno F.;An Q.;Azzarello P.;Barbato F. C. T.;Bernardini P.;Bi X. J.;Cai M. S.;Catanzani E.;Chang J.;Chen D. Y.;Chen J. L.;Chen Z. F.;Cui M. Y.;Cui T. S.;Cui Y. X.;Dai H. T.;D'Amone A.;De Benedittis A.;De Mitri I;de Palma F.;Deliyergiyev M.;Di Santo M.
本文报道了利用暗物质粒子探测器(DAMPE)记录的4.5年数据，测量了从70GeV到80TeV的宇宙线氦核的能谱。在约1.3TeV的能量下观察到光谱硬化，类似于先前的观察。此外，首次揭示了约34TeV的光谱软化现象，具有较大的统计数据和良好控制的系统不确定性，总体意义为。对宇宙质子和氦原子核的DAMPE光谱测量表明，粒子电荷依赖于软化能量，尽管在当前的不确定性下，不能排除依赖于核子数量的可能性。
The measurement of the energy spectrum of cosmic ray helium nuclei from 70 GeV to 80 TeV using 4.5 years of data recorded by the Dark Matter Particle Explorer (DAMPE) is reported in this work. A hardening of the spectrum is observed at an energy of about 1.3 TeV, similar to previous observations. In addition, a spectral softening at about 34 TeV is revealed for the first time with large statistics and well controlled systematic uncertainties, with an overall significance of. The DAMPE spectral measurements of both cosmic protons and helium nuclei suggest a particle charge dependent softening energy, although with current uncertainties a dependence on the number of nucleons cannot be ruled out.