Resonant coherent excitation of hydrogen atoms during grazing scattering from a LiF(001) surface
Resonant coherent excitation of hydrogen atoms during grazing scattering from a LiF(001) surface
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LiF(001)表面掠散射过程中氢原子的共振相干激发
DOI：
10.1103/physreva.62.012903
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发表时间：
2000
影响因子：
2.9
通讯作者：
H. Winter
中科院分区：
文献类型：
--
作者：
C. Auth;H. Winter
能量在keV范围内的质子在掠入射角下从干净平坦的LiF（001）表面散射。对于特定的射弹能量，由于离子晶体的点电荷晶格的周期性库仑场导致n= 1到n= 2态的“共振相干激发”（RCE）。在我们的实验中，通过激发态的辐射衰变中发射的莱曼-α光的强度，作为射弹能量和晶体表面方位角取向的函数，来探测这种激发。我们发现了RCE具有良好的信号与背景比的明确证据，使我们能够对共振的位置，宽度和线形进行详细的研究。
Protons with energies in the keV domain are scattered from a clean and flat LiF (001) surface under a grazing angle of incidence. For specific projectile energies, the periodic Coulomb field owing to the point-charge lattice of the ionic crystal leads to the “resonant coherent excitation”(RCE) of the n= 1 to the n= 2 states. This excitation is probed in our experiments via the intensity of Lyman-α light, emitted in the radiative decay of the excited states, as a function of projectile energy and azimuthal orientation of the crystal surface. We find clear evidence for RCE with a good signal to background ratio that allows us to perform detailed studies on the position, width, and line shape of the resonance.