Resonant structure in doubly charged ion formation during multiphoton ionization of Sr and Ba atoms by infrared laser radiation

Бондар, І. І.; Суран, В. В.; Dudich, M.I.

doi:10.1088/0953-4075/33/20/304

Cited by 21 publications

(11 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

Section: Laser Frequency Dependencesupporting

confidence: 93%

“…Figure 1 reveals a resonant structure in Ba + and Ba 2+ yields. This result qualitatively coincides with our previous results [23,24] in the same spectral region but with different intensities. An analysis shows that the resonant maximum in Ba + yield, displayed in Figure 1, is due to five-photon ionization of Ba atoms through the four-photon resonance with state 6p 2 1 D 2 substantially perturbed by the ac Stark effect.…”

Section: Introductionsupporting

confidence: 93%

See 1 more Smart Citation

Multiphoton-double-ionization probability linearly depends on laser intensity: Experimental studies of barium

2013

View full text Add to dashboard Cite

Despite inherently complex multiphoton dynamics, our observations show that Ba double ionization with an infrared laser (8800-8920 cm −1 ) resembles a single-photon process; namely, its probability is proportional to the laser intensity. In this regime, single-electron ionization is due to a four-photon resonant transition through the highly perturbed state 6p 2 1 D 2 , whereas double ionization is realized by the two-electron mechanism. Furthermore, we argue that these conclusions are valid for other alkaline-earth-metal atoms and other parameters of laser radiation.

show abstract

Section: Laser Frequency Dependencesupporting

confidence: 93%

Section: Introductionsupporting

confidence: 93%

Multiphoton-double-ionization probability linearly depends on laser intensity: Experimental studies of barium

2013

View full text Add to dashboard Cite

show abstract

“…Попередні наші дослідження показали, що в результаті нелінійної іонізації атомів стронцію [3][4][5][6][7] і барію [8][9][10][11] в інфрачервоній області спектра (ω≈8200-9500 см -1 ), реалізується двоелектронний механізм утворення двозарядних іонів, тобто відбувається одночасний відрив двох зовнішніх s-електронів від цих атомів.…”

Section: вступunclassified

THE MECHANISM OF DOUBLY CHARGED IONS FORMATION UPON MULTIPHOTON IONIZATION OF BARIUM ATOMS BY LASER RADIATION OF 16800-18700 сm<sub>-1</sub> SPECTRAL RANGE

Суран¹,

Бондар²

2014

Sci.Herald.Uzh.Univ.Ser.Phys

View full text Add to dashboard Cite

В широкій області частот досліджений процес утворення двозарядних іонів при багатофотонній іонізації атомів барію лінійно-і циркулярнополяризованим випромінюванням лазерів на барвниках. При зміні частоти випромінювання у виходах іонів Ва + і Ва 2+ виявлено велике число резонансних максимумів. Однозначно доведено, що велика частина резонансних максимумів у виході іонів Ва 2+ , обумовлена реалізацією резонансних переходів в спектр іонів Ва + . Цей факт однозначно доводить реалізацію каскадного механізму утворення іонів Ва 2+ в області частот, що відповідають локалізації цих максимумів.Ключові слова: багатофотонна іонізація, двозарядні іони, каскадний механізм, атом барію, резонансний процес.

show abstract

“…Originally, NSDI has been discovered experimentally for alkaline-earth atoms [3] (regarding further experimental investigations of NSDI for alkaline-earth atoms, see, e.g., Refs. [4][5][6][7][8][9] and references therein). Later, NSDI has been found in nobel gas atoms [10,11].…”

Section: Introductionmentioning

confidence: 99%

Nonsequential double ionization below laser-intensity threshold: Anticorrelation of electrons without excitation of parent ion

et al. 2011

View full text Add to dashboard Cite

Two-electron correlated spectra of non-sequential double ionization below laser-intensity threshold are known to exhibit back-to-back scattering of the electrons, viz., the anticorrelation of the electrons. Currently, the widely accepted interpretation of the anticorrelation is recollision-induced excitation of the ion plus subsequent field ionization of the second electron. We argue that another mechanism, namely simultaneous electron emission, when the time of return of the rescattered electron is equal to the time of liberation of the bounded electron (the ion has no time for excitation), can also explain the anticorrelation of the electrons in the deep below laser-intensity threshold regime. Our conclusion is based on the results of the numerical solution of the time-dependent Schrödinger equation for a model system of two one-dimensional electrons as well as an adiabatic analytic model that allows for a closed-form solution.

show abstract

Resonant structure in doubly charged ion formation during multiphoton ionization of Sr and Ba atoms by infrared laser radiation

Cited by 21 publications

References 9 publications

Multiphoton-double-ionization probability linearly depends on laser intensity: Experimental studies of barium

Multiphoton-double-ionization probability linearly depends on laser intensity: Experimental studies of barium

THE MECHANISM OF DOUBLY CHARGED IONS FORMATION UPON MULTIPHOTON IONIZATION OF BARIUM ATOMS BY LASER RADIATION OF 16800-18700 сm<sub>-1</sub> SPECTRAL RANGE

Nonsequential double ionization below laser-intensity threshold: Anticorrelation of electrons without excitation of parent ion

Contact Info

Product

Resources

About