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Delayed Relaxation of Highly Excited Cationic States in Naphthalene

机译:在萘中延迟放松高度兴奋的阳离子状态

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摘要

Rapid energy transfer from electronic to nuclear degrees of freedom underlies many biological processes and astrophysical observations. The efficiency of this energy transfer depends strongly on the complex interplay between electronic and nuclear motions. In this study, we report two-color pump-probe experiments that probe the relaxation dynamics of highly excited cationic states of naphthalene, a prototypical polycyclic aromatic hydrocarbon molecule, which are produced using wavelength-selected, ultrashort extreme ultraviolet pulses. Surprisingly, the relaxation lifetimes increase with the cationic excitation energy. We postulate that the observed effect is the result of a population trapping that leads to delayed relaxation.
机译:从电子到核自由度的快速能量转移是许多生物过程和天体物理观测。 这种能量转移的效率强烈取决于电子和核动作之间的复杂相互作用。 在这项研究中,我们报告了双色泵探针实验,探讨了使用波长选择的超短极紫外脉冲产生的原型多环芳烃分子的高兴奋阳离子状态的释放阳离子状态的松弛动力学。 令人惊讶的是,松弛寿命随着阳离子励磁能量而增加。 我们假设观察到的效果是人口陷阱的结果,导致延迟放松。

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