Time resolved luminescence spectroscopy of alkaline earth oxides after pulsed electron beam irradiation. II. Spectra and thresholds of MgO
Time resolved luminescence spectroscopy of alkaline earth oxides after pulsed electron beam irradiation. II. Spectra and thresholds of MgO
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DOI：
10.1063/1.456105
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发表时间：
1988-04
影响因子：
4.4
通讯作者：
Janice L. Grant;R. Cooper;P. Zeglinski;J. F. Boas
中科院分区：
文献类型：
--
作者：
Janice L. Grant;R. Cooper;P. Zeglinski;J. F. Boas
用时间分辨发光光谱研究了S用0.2MeV到3.0MeV能量的纳秒脉冲辐照氧化镁后，在100 ns到100μ的时间范围内产生的发射。在∼380nm处的阈值能量为0.2 8±0.0 1 MeV的发射归因于氧离子位移和F+中心的形成过程。在∼2 40 nm处的发射是由镁离子的置换过程引起的，其阈值能量为0.32±0.0 1 MeV。在电子能量为3.0 MeV的∼470 nm处的发射归因于F+中心聚集体(如F2+2中心)的形成过程。氧阴离子和镁离子的位移能分别为49±2 eV和38±2 eV。
Time‐resolved luminescence spectroscopy has been used to study the emissions occurring in MgO in the time range 100 ns to 100 μs after irradiation with nanosecond duration pulses of electrons of energy between 0.2 and 3.0 MeV. An emission at ∼380 nm with a threshold energy of 0.28±0.01 MeV is attributed to processes resulting from the displacement of oxygen anions and the formation of F+ centers. An emission at ∼240 nm is attributed to processes resulting from the displacement of magnesium cations, with a threshold energy of 0.32±0.01 MeV. An emission at ∼470 nm at an electron energy of 3.0 MeV is attributed to processes resulting from the formation of aggregates of F+ centers, such as the F2+2 center. Displacement energies of 49±2 and 38±2 eV were estimated for oxygen anions and magnesium cations, respectively.