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arXiv 0704.2479physics.atom-phphysics.chem-ph
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强场近似下H_2^+在短强脉冲laser作用下的库仑爆炸

Strong-field approximation for Coulomb explosion of H_2^+ by short intense laser pulses

H. A. Leth, L. M. Madsen, J. F. McCann

摘要:

提出了一个简单的量子力学模型来描述H $_2^+$在短脉冲强红外激光作用下的库仑爆炸。该模型是基于长度规范版本的分子强场近似,是有效的脉冲短于50 fs的电离前的解离过程是可以忽略不计的。并与最近的质子能谱实验结果作了比较[I]。Ben-Itzhak等人,物理修订版信函95,073002(2005),B. D. Esry等人,物理修订版信函97,013003(2006)]。尽管峰值能量略低于观测值,但模型的预测再现了光谱的轮廓。为了比较,我们还提出了两种不同的隧道模型,这个过程中得到的结果。

英文摘要:

We present a simple quantum mechanical model to describe Coulomb explosion of H$_2^+$ by short, intense, infrared laser pulses. The model is based on the length gauge version of the molecular strong-field approximation and is valid for pulses shorter than 50 fs where the process of dissociation prior to ionization is negligible. The results are compared with recent experimental results for the proton energy spectrum [I. Ben-Itzhak et al., Phys. Rev. Lett. 95, 073002 (2005), B. D. Esry et al., Phys. Rev. Lett. 97, 013003 (2006)]. The predictions of the model reproduce the profile of the spectrum although the peak energy is slightly lower than the observations. For comparison, we also present results obtained by two different tunneling models for this process.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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