Effects of the Chirped Pulse on Dissociation and Ionization Processes for Hydrogen Molecular Ions at Low Vibrational States

被引：5

作者：

Zhang, Cai-Ping ^{[1
]}

Miao, Xiang-Yang ^{[1
]}

机构：

[1] Shanxi Normal Univ, Coll Phys & Informat Engn, Linfen 041004, Peoples R China

来源：

SPECTROSCOPY LETTERS | 2014年 / 47卷 / 04期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

33.80.Eh; 33.20.Xx; 33.80.Gj; dissociation; chirped pulse; ionization; H-2(+); DYNAMICS; H-2+;

D O I：

10.1080/00387010.2013.797912

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The influence of a chirped laser pulse (5- fs, 800- nm) on dissociation and ionization processes for hydrogen molecular ions at low vibrational levels with different intensities has been discussed by numerically solving the one-dimensional time-dependent Schrodinger equation. By employing the "virtual detector" method, the probabilities and kinetic- energy- release spectra of dissociation and Coulomb explosion channels have been calculated. The results indicate that both the dissociation and ionization processes could be enhanced with proper chirp parameters; additionally, the dissociation process occurring at an early time in the chirped laser field is more sensitive to chirp parameters at low intensity due to the enhancement of the bond softening channel. The corresponding theoretical explanation is also provided.

引用

页码：267 / 280

页数：14

共 59 条

[41]

Picon A., 2010, PHYS REV A, V83

[42] Slow protons as a signature of zero-photon dissociation of H2+ intense laser fields [J].

Posthumus, JH ;

Plumridge, J ;

Frasinski, LJ ;

Codling, K ;

Divall, EJ ;

Langley, AJ ;

Taday, PF .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2000, 33 (16) :L563-L569

[43] The dynamics of small molecules in intense laser fields [J].

Posthumus, JH .

REPORTS ON PROGRESS IN PHYSICS, 2004, 67 (05) :623-665

[44] Tracing the photodissociation probability of H2+ in intense fields using chirped laser pulses [J].

Prabhudesai, Vaibhav S. ;

Lev, Uri ;

Natan, Adi ;

Bruner, Barry D. ;

Diner, Adi ;

Heber, Oded ;

Strasser, Daniel ;

Schwalm, D. ;

Ben-Itzhak, Itzik ;

Hua, J. J. ;

Esry, B. D. ;

Silberberg, Yaron ;

Zajfman, Daniel .

PHYSICAL REVIEW A, 2010, 81 (02)

[45] Controlling HD+ and H2+ dissociation with the carrier-envelope phase difference of an intense ultrashort laser pulse -: art. no. 163601 [J].

Roudnev, V ;

Esry, BD ;

Ben-Itzhak, I .

PHYSICAL REVIEW LETTERS, 2004, 93 (16) :163601-1

[46] Dissociation dynamics of H2+ in intense laser fields:: Investigation of photofragments from single vibrational levels [J].

Sändig, K ;

Figger, H ;

Hänsch, TW .

PHYSICAL REVIEW LETTERS, 2000, 85 (23) :4876-4879

[47] Control of Electron Localization in Deuterium Molecular Ions using an Attosecond Pulse Train and a Many-Cycle Infrared Pulse [J].

Singh, K. P. ;

He, F. ;

Ranitovic, P. ;

Cao, W. ;

De, S. ;

Ray, D. ;

Chen, S. ;

Thumm, U. ;

Becker, A. ;

Murnane, M. M. ;

Kapteyn, H. C. ;

Litvinyuk, I. V. ;

Cocke, C. L. .

PHYSICAL REVIEW LETTERS, 2010, 104 (02)

[48] Molecular alignment of fragmenting H2+ and H2 in strong laser fields -: art. no. 045402 [J].

Uhlmann, M ;

Kunert, T ;

Schmidt, R .

PHYSICAL REVIEW A, 2005, 72 (04)

[49] Multiphoton dissociation of HeH+ below the He+(1s)+H(1s) threshold [J].

Ursrey, D. ;

Anis, F. ;

Esry, B. D. .

PHYSICAL REVIEW A, 2012, 85 (02)

[50] Dissociation of H2+ in intense femtosecond laser fields studied by coincidence three-dimensional momentum imaging [J].

Wang, P. Q. ;

Sayler, A. M. ;

Carnes, K. D. ;

Xia, J. F. ;

Smith, M. A. ;

Esry, B. D. ;

Ben-Itzhak, I. .

PHYSICAL REVIEW A, 2006, 74 (04)

← 1 2 3 4 5 6 →