Electron-Nuclear Coupling through Autoionizing States after Strong-Field Excitation of H2 Molecules

被引：15

作者：

Mi, Yonghao ^{[1
]}

Camus, Nicolas ^{[1
]}

Fechner, Lutz ^{[1
]}

Laux, Martin ^{[1
]}

Moshammer, Robert ^{[1
]}

Pfeifer, Thomas ^{[1
]}

机构：

[1] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 18期

关键词：

ABOVE-THRESHOLD IONIZATION; SUBPICOSECOND LASER-PULSES; H2; MOLECULE; PHOTOIONIZATION; DISSOCIATION; LOCALIZATION; DEPENDENCE; ENERGIES; DYNAMICS;

D O I：

10.1103/PhysRevLett.118.183201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Channel-selective electron emission from strong-field photoionization of H-2 molecules is experimentally investigated by using ultrashort laser pulses and a reaction microscope. The electron momenta and energy spectra in coincidence with bound and dissociative ionization channels are compared. Surprisingly, we observed an enhancement of the photoelectron yield in the low-energy region for the bound ionization channel. By further investigation of asymmetrical electron emission using two-color laser pulses, this enhancement is understood as the population of the autoionizing states of H-2 molecules in which vibrational energy is transferred to electronic energy. This general mechanism provides access to the vibrational-state distribution of molecular ions produced in a strong-field interaction.

引用

页数：5

共 38 条

[11] Breakup of H2 in singly ionizing collisions with fast protons:: Channel-selective low-energy electron spectra -: art. no. 123203 [J].

Dimopoulou, C ;

Moshammer, R ;

Fischer, D ;

Höhr, C ;

Dorn, A ;

Fainstein, PD ;

Urrutia, JRCL ;

Schröter, CD ;

Kollmus, H ;

Mann, R ;

Hagmann, S ;

Ullrich, J .

PHYSICAL REVIEW LETTERS, 2004, 93 (12) :123203-1

[12] Ionization with low-frequency fields in the tunneling regime [J].

Dura, J. ;

Camus, N. ;

Thai, A. ;

Britz, A. ;

Hemmer, M. ;

Baudisch, M. ;

Senftleben, A. ;

Schroeter, C. D. ;

Ullrich, J. ;

Moshammer, R. ;

Biegert, J. .

SCIENTIFIC REPORTS, 2013, 3

[13] Creation and survival of autoionizing states in strong laser fields [J].

Fechner, Lutz ;

Camus, Nicolas ;

Krupp, Andreas ;

Ullrich, Joachim ;

Pfeifer, Thomas ;

Moshammer, Robert .

PHYSICAL REVIEW A, 2015, 92 (05)

[14] Electron Localization Involving Doubly Excited States in Broadband Extreme Ultraviolet Ionization of H2 [J].

Fischer, Andreas ;

Sperl, Alexander ;

Coerlin, Philipp ;

Schoenwald, Michael ;

Rietz, Helga ;

Palacios, Alicia ;

Gonzalez-Castrillo, Alberto ;

Martin, Fernando ;

Pfeifer, Thomas ;

Ullrich, Joachim ;

Senftleben, Arne ;

Moshammer, Robert .

PHYSICAL REVIEW LETTERS, 2013, 110 (21)

[15] INVESTIGATIONS OF ABOVE-THRESHOLD IONIZATION USING SUBPICOSECOND LASER-PULSES [J].

FREEMAN, RR ;

BUCKSBAUM, PH .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1991, 24 (02) :325-347

[16] ABOVE-THRESHOLD IONIZATION WITH SUBPICOSECOND LASER-PULSES [J].

FREEMAN, RR ;

BUCKSBAUM, PH ;

MILCHBERG, H ;

DARACK, S ;

SCHUMACHER, D ;

GEUSIC, ME .

PHYSICAL REVIEW LETTERS, 1987, 59 (10) :1092-1095

[17] The transition probabilities from the ground state to the excited J=0 1Σu+ levels of H2: Measurements and ab initio quantum defect study [J].

Glass-Maujean, M. ;

Jungen, Ch. ;

Schmoranzer, H. ;

Haar, I. ;

Knie, A. ;

Reiss, P. ;

Ehresmann, A. .

JOURNAL OF CHEMICAL PHYSICS, 2011, 135 (14)

[18] Two-Dimensional Directional Proton Emission in Dissociative Ionization of H2 [J].

Gong, Xiaochun ;

He, Peilun ;

Song, Qiying ;

Ji, Qinying ;

Pan, Haifeng ;

Ding, Jingxin ;

He, Feng ;

Zeng, Heping ;

Wu, Jian .

PHYSICAL REVIEW LETTERS, 2014, 113 (20)

[19] RYDBERG SERIES AND IONIZATION POTENTIAL OF H2 MOLECULE [J].

HERZBERG, G ;

JUNGEN, C .

JOURNAL OF MOLECULAR SPECTROSCOPY, 1972, 41 (03) :425-+

[20] Photoelectron-photoion coincidence momentum imaging for dissociative ionization of ethanol in intense laser fields [J].

Hosaka, Kouichi ;

Itakura, Ryuji ;

Yokoyama, Keiichi ;

Yamanouchi, Kaoru ;

Yokoyama, Atsushi .

CHEMICAL PHYSICS LETTERS, 2009, 475 (1-3) :19-23

← 1 2 3 4 →