Nuclear wave-packet dynamics on nearly degenerate two adiabatic potential energy surfaces in the excited state of KIF centers

被引：7

作者：

Koyama, Takeshi ^{[1
]}

Takahashi, Youtarou ^{[1
]}

Nakajima, Makoto ^{[1
]}

Suemoto, Tohru ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.76.115122

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nuclear wave-packet dynamics in the excited state of KI F centers is investigated by using time-resolved luminescence spectroscopy based on the up-conversion technique. The observed transient spectrum involves an oscillatory and a nonoscillatory component. The origins of these components are interrogated by comparing the results with a model calculation based on the resonant secondary radiation theory. The oscillatory part reflects the coupling of the 2s-like electron mainly to the totally symmetric local mode around the F center. The nonoscillatory part reflects the incoherent population of the vibrational levels in the 2p-like state, which couples to many bulk phonon modes with a broad density of state. The model calculation suggests that the transition probability to the 2p-like state is approximately 0.05.

引用

页数：10

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