Photoelectron energy loss and spectral features deduced by the plasma line technique. [in topside F region]
Photoelectron energy loss and spectral features deduced by the plasma line technique. [in topside F region]
复制标题
等离子线技术推导出的光电子能量损失和光谱特征。
DOI：
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发表时间：
1977
期刊：
影响因子：
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通讯作者：
H. Carlson
中科院分区：
文献类型：
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作者：
V. Abreu;H. Carlson
收集在阿雷西博天文台的等离子体线数据被用来检查在5- 20-eV范围内的顶侧F区域微分光电子通量的相对变化。注意到在15 eV附近的光谱特征没有发现在目前的理论计算的光谱。一种新的方法来解释测量的光谱，它允许不同的能量损失机制的相对重要性的定性估计。在较高高度（h ≥ 350 km）和较低能量（E ≤ 10 eV）观测到的光电子通量能谱的高度变化与Schunk和Hays（1971）在假定主要能量损失机制是环境热电子气的假设下计算的谱的预期变化在数量上一致。
Plasma line data gathered at the Arecibo Observatory are used to examine relative variations in topside F region differential photoelectron fluxes in the 5- to 20-eV range. A spectral feature not found in present theoretically calculated spectra is noted near 15 eV. A new approach to the interpretation of the measured spectra is taken, which allows a qualitative estimate of the relative importance of different energy loss mechanisms. The altitude variation of the observed photoelectron flux energy spectra at the higher altitudes (h ≥ 350 km) and the lower energies (E ≲ 10 eV) agrees quantitatively with the expected variation of the spectrum calculated on the assumption that the dominant energy loss mechanism is to the ambient thermal electron gas, as given by Schunk and Hays (1971).