Resonance-Enhanced Multiphoton Ionization in the X-Ray Regime,Physical Review Letters

当前位置： X-MOL 学术 › Phys. Rev. Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Resonance-Enhanced Multiphoton Ionization in the X-Ray Regime
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-11-19 , DOI: 10.1103/physrevlett.127.213202
Aaron C LaForge ₁ , Sang-Kil Son _{2,

3} , Debadarshini Mishra ₁ , Markus Ilchen _{4,

5} , Stephen Duncanson ₁ , Eemeli Eronen ₆ , Edwin Kukk ₆ , Stanislaw Wirok-Stoletow _{2,

7} , Daria Kolbasova _{2,

7} , Peter Walter ₈ , Rebecca Boll ₄ , Alberto De Fanis ₄ , Michael Meyer ₄ , Yevheniy Ovcharenko ₄ , Daniel E Rivas ₄ , Philipp Schmidt ₄ , Sergey Usenko ₄ , Robin Santra _{2,

3,

7} , Nora Berrah ₁

Affiliation

Here, we report on the nonlinear ionization of argon atoms in the short wavelength regime using ultraintense x rays from the European XFEL. After sequential multiphoton ionization, high charge states are obtained. For photon energies that are insufficient to directly ionize a

1 s

electron, a different mechanism is required to obtain ionization to

{Ar}^{17 +}

. We propose this occurs through a two-color process where the second harmonic of the FEL pulse resonantly excites the system via a

1 s \to 2 p

transition followed by ionization by the fundamental FEL pulse, which is a type of x-ray resonance-enhanced multiphoton ionization (REMPI). This resonant phenomenon occurs not only for

{Ar}^{16 +}

, but also through lower charge states, where multiple ionization competes with decay lifetimes, making x-ray REMPI distinctive from conventional REMPI. With the aid of state-of-the-art theoretical calculations, we explain the effects of x-ray REMPI on the relevant ion yields and spectral profile.

更新日期：2021-11-19

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11