Photon Momentum Transfer in Single-Photon Double Ionization of Helium

被引：23

作者：

Chen, Si-Ge ^{[1
]}

Jiang, Wei-Chao ^{[2
]}

Grundmann, Sven ^{[3
]}

Trinter, Florian ^{[4
,5
]}

Schoeffler, M. ^{[3
]}

Jahnke, Till ^{[3
]}

Doerner, R. ^{[3
]}

Liang, Hao ^{[1
]}

Wang, Mu-Xue ^{[1
]}

Peng, Liang-You ^{[1
,6
,7
,8
,9
]}

Gong, Qihuang ^{[1
,6
,7
,8
,9
]}

机构：

[1] Peking Univ, Sch Phys, State Key Lab Artificial Microstruct & Mesoscop P, Beijing 100871, Peoples R China

[2] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China

[3] Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany

[4] DESY, FS PETRA S, Notkestr 85, D-22607 Hamburg, Germany

[5] Fritz Haber Inst Max Planck Gesell, Mol Phys, Faraday 4, D-14195 Berlin, Germany

[6] Minist Educ, Nanooptoelect Frontier Ctr, Beijing 100871, Peoples R China

[7] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

[8] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China

[9] Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 124卷 / 04期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

DOUBLE PHOTOIONIZATION; HE;

D O I：

10.1103/PhysRevLett.124.043201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We theoretically and experimentally investigate the photon momentum transfer in single-photon double ionization of helium at various large photon energies. We find that the forward shifts of the momenta along the light propagation of the two photoelectrons are roughly proportional to their fraction of the excess energy. The mean value of the forward momentum is about 8/5 of the electron energy divided by the speed of light. This holds for fast and slow electrons despite the fact that the energy sharing is highly asymmetric and the slow electron is known to be ejected by secondary processes of shake off and knockout rather than directly taking its energy from the photon. The biggest deviations from this rule are found for the region of equal energy sharing where the quasifree mechanism dominates double ionization.

引用

页数：6

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