Enhanced resonant x-ray emissions of mechanically milled hexagonal boron nitride in boron K-shell excitation.
Enhanced resonant x-ray emissions of mechanically milled hexagonal boron nitride in boron K-shell excitation.
复制标题
机械研磨六方氮化硼在硼 K 壳层激发下增强的共振 X 射线发射。
DOI：
10.1103/physrevlett.76.3846
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发表时间：
1996
影响因子：
8.6
通讯作者：
Motoyama
中科院分区：
文献类型：
--
作者：
Muramatsu;Oshima;Kawai;Tadokoro;Adachi;Agui;Shin;Kato;Kohzuki;Motoyama
利用准单色波动辐射，观察了六方氮化硼纳米团簇在硼k壳激发下的增强共振x射线发射。谐振x射线发射强度随着磨粒团簇尺寸的减小而增大。用离散变分Xa方法将实测的x射线发射光谱与计算的x射线发射光谱进行比较，发现共振x射线发射增强的原因是B1 s - n p B1 s 21电子跃迁，其中n p是具有悬空键的双配位硼原子的未占据的非键轨道。激发到n p轨道的x射线发射可能用于探测纳米团簇中的悬空键。[s0031 - 9007 (96) 00198 - 6]
Enhanced resonant x-ray emissions were observed from mechanically milled hexagonal boron nitride nanoclusters in boron K-shell excitation using quasimonochromatic undulator radiation. The resonant x-ray emission intensity increases with decrease in size of the milled clusters. Comparison of the measured x-ray emission spectra with the calculated spectra using the discrete-variational Xa methods showed enhanced resonant x-ray emissions originate from the B1 s - n p B1 s 2 1 electron transition, with n p an unoccupied nonbonding orbital of twofold-coordination boron atoms with dangling bonds. X-ray emissions excited to n p orbitals may be possible for detecting dangling bonds in nanoclusters. [S0031-9007(96)00198-6]