Cluster-assistant generation of multiply charged atomic ions in nanosecond laser ionization of seeded methyl iodide beam

Luo, Xiaolin; Niu, Dongmei; Kong, Xianglei; Wen, Liping; Feng, Liqiang; Pei, Kernel; Wang, Bin; Li, Haiyang

doi:10.1016/j.chemphys.2004.09.033

Cited by 33 publications

(21 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[Fe] 2+ , [Ar] 2+ /[Kr] 2+ , [C] 2+ and [O] 2+ . The wavelength‐dependent generation of doubly charged atomic ions in doped clusters is in agreement with the previously proposed three‐stage cluster ionization mechanism, according to which the primary step for the generation of doubly charged atomic ions is dissociation of Fe(CO) 5 and generation of a bare neutral iron atom. This iron atom absorbs additional photons from the laser pulse and undergoes ionization via multiphoton absorption leading to the generation of [Fe] + .…”

Section: Resultssupporting

confidence: 89%

Effect of cluster expansion on photoionization of iron pentacarbonyl doped inert gas clusters under gigawatt intensity laser irradiation

Badani

Das

Sharma

et al. 2012

Rapid Comm Mass Spectrometry

View full text Add to dashboard Cite

Wavelength-dependent generation of multiply charged atomic ions has been explained based on the three stage model, i.e. multiphoton ionization ignited-inverse bremsstrahlung heating, and electron ionization. This model explains enhancement in the charge state of atomic ions with increasing wavelength based on inverse bremsstrahlung heating of the inner ionized electron, which is a more efficient process at longer wavelengths. Inefficient coupling of laser energy in the case of doped inert gas clusters compared with pure inert gas clusters has been rationalized on the basis of accelerated disintegration of the cluster due to facile initial ionization of dopant molecules having low ionization energy. The results suggest that a longer laser wavelength and a slower rate of cluster expansion facilitate the efficient transfer of optical energy into cluster systems.

show abstract

Section: Resultssupporting

confidence: 89%

Effect of cluster expansion on photoionization of iron pentacarbonyl doped inert gas clusters under gigawatt intensity laser irradiation

Badani

Das

Sharma

et al. 2012

Rapid Comm Mass Spectrometry

View full text Add to dashboard Cite

show abstract

“…The experimental setup has been presented in detail previously [15,19]. Briefly, the pulsed methyl iodide beam was carried into the vacuum chamber by a noble gas (pressure $ 0.1-0.5 MPa) through a pulsed valve (/ = 0.5 mm) and then into the ionization chamber through a skimmer (/ = 3 mm).…”

Section: Methodsmentioning

confidence: 99%

“…We observe multiple-charge carbon and iodine ions when pulsed methyl iodide clusters are irradiated by nanosecond lasers, and we have reported the influence of laser intensity on the kinetic energy and peak profile of the ion products [19,20]. Sharma et al recently reported similar multiple-charge ions using a nanosecond laser with intensity of 10 9 W/cm 2 [21].…”

Section: Introductionmentioning

confidence: 90%

Cluster-assisted multiple-ionization of methyl iodide by a nanosecond laser: Wavelength dependence of multiple-charge ions

Wang

Niu

et al. 2008

Chemical Physics

Self Cite

View full text Add to dashboard Cite

“…[8][9][10][11] Recently, Coulomb explosion has been reported using nanosecond laser pulses of intensity ~ 10 9 W/cm 2 in methyl iodide, carbon disulfide, acetone and several other molecular clusters leading to formation of multiply charged atomic ions (up to C 4+ , I 5+ , S 6+ and O 4+ ) with large kinetic energy. [12][13][14][15] Generation of these multiply charged atomic ions at such low laser intensity is rather unusual. Though the high intensity Coulomb explosion is reasonably well understood, the understanding of giga watt induced Coulomb explosion at present is very meagre.…”

Section: Introductionmentioning

confidence: 98%

Coulomb explosion of methyl iodide clusters using giga watt laser pulses in the visible region: Effect of wavelength, polarisation and doping

2009

View full text Add to dashboard Cite

Nanosecond laser-induced Coulomb explosion studies have been carried out for methyl iodide clusters at 532 and 563 nm under similar laser intensity (~ 5 × 10 9 W/cm 2 ) conditions. Multiply charged atomic ions of carbon and iodine having large kinetic energy (~ 100 s of eV) were observed in both the cases. Observation of higher charged states at 563 nm for Coulomb exploded atomic ions supports the preposition of enhanced inverse bremsstrahlung heating of the ionized cluster system at this wavelength. The angular distribution of the multiply charged atomic ions is found to be isotropic with respect to laser polarization direction at 532 nm. When water doped methyl iodide clusters were irradiated at 563 nm, highly charged atomic ions of oxygen along with carbon and iodine were also observed. This result suggests that the mechanism leading to Coulomb explosion is a collective property of the cluster as a whole and individual molecular properties do not play significant role.

show abstract

Cluster-assistant generation of multiply charged atomic ions in nanosecond laser ionization of seeded methyl iodide beam

Cited by 33 publications

References 37 publications

Effect of cluster expansion on photoionization of iron pentacarbonyl doped inert gas clusters under gigawatt intensity laser irradiation

Effect of cluster expansion on photoionization of iron pentacarbonyl doped inert gas clusters under gigawatt intensity laser irradiation

Cluster-assisted multiple-ionization of methyl iodide by a nanosecond laser: Wavelength dependence of multiple-charge ions

Coulomb explosion of methyl iodide clusters using giga watt laser pulses in the visible region: Effect of wavelength, polarisation and doping

Contact Info

Product

Resources

About