Abstract The unoccupied density of states of α-plutonium metal, plutonium sesquioxide (α-Pu2O3) and plutonium dioxide (PuO2) have been measured using inverse photoemission spectroscopy (IPS) in the isochromat mode (9.7 eV). Ultraviolet Photoelectron spectroscopy (UPS) at four different photon energies between 11 and 41 eV are also reported to support the interpretation of the IPS data. The band gap energies of the oxides have been determined from the combination of UPS and IPS spectra; the photoelectric work function was established from the UPS data for the metal and oxides and information from the UPS and IPS spectra have been used to aid interpretation of the core level Pu 4f XPS data.

中文翻译：

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钚金属和氧化物的逆​​光电发射测量

摘要 α-钚金属、钚倍半氧化物 (α-Pu2O3) 和二氧化钚 (PuO2) 的未占据态密度已使用逆光电子能谱 (IPS) 在等色模式 (9.7 eV) 下进行测量。还报告了 11 到 41 eV 之间四种不同光子能量的紫外光电子能谱 (UPS)，以支持对 IPS 数据的解释。氧化物的带隙能量是由 UPS 和 IPS 光谱的组合确定的；光电功函数是根据金属和氧化物的 UPS 数据建立的，并且来自 UPS 和 IPS 光谱的信息已用于帮助解释核心级 Pu 4f XPS 数据。