Two-body fragmentation dynamics of 
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Chen, Lei; Shan, Xu; Zhao, Xi; Zhu, Xiaolong; Hu, Xiaoqing; Wu, Yong; Feng, Wei; Guo, Donghui; Zhang, R. T.; Gao, Yong; Huang, Zhongkui; Wang, Jianguo; Ma, Xueli; Chen, Xiangjun

doi:10.1103/physreva.99.012710

Cited by 8 publications

(10 citation statements)

References 51 publications

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“…Comparing with the previous studies (for instance, see Refs. [5,8,10,12,21,31]) which reported a long tail extending from the N + + NO + coincidence trace in the ion-ion coincidence map, in contrast, the tail structure in our data can, if exists, hardly be observed. The observed difference can be ascribed to the collisional population of the metastable 1 3 Π state in the previous studies, [21,22] a channel which is energetically not allowed in our experiment.…”

Section: Resultscontrasting

confidence: 83%

“…Very recently, the dissociation pathways of N 2 O 2+ induced by collisions between 5.7 keV/u Xe 15+ and N 2 O were distinguished. [8] In the work, the KER spectra showed some similarities to those of electron/photon impact, and the peak positions were found at 6.8 eV and 9.0 eV, respectively. It was concluded that the measured peak at 6.8 eV originates from two states: (a) the N 2 O 2+ ground state (X 3 Σ − ) which dissociates to N + ( 3 P) + NO + ( 1 Σ + ); (b) the metastable state (1 3 Π) which decays radiatively to X 3 Σ − and dissociates subsequently.…”

Section: Introductionmentioning

confidence: 74%

“…Condition KER/eV Electrons 1300 eV 7.2 ± 0.7 [10] 50 eV 6.3 ± 1.0 [11] 10 keV 4.0 ± 0.5, 5.3 ± 0.6 [7] 5 keV 6.6 ± 0.2 [12] HCIs 5.9 MeV/u Xe 43+ 7.0 [13] 5.7 keV/u Xe 15+ 6.8, 9.0 [8] Intense laser 795 nm, 100 fs, ∼5 PW/cm 2 6.5 ± 2.0 [14] 800 nm, 60 fs, ∼0.16 PW/cm 2 6.8 ± 2.0 [15] 750 nm, 4 fs, ∼0.3 PW/cm 2 6.8 [5] Photons 40.8 eV 6.4 ± 0.3 [17] 12.4-51.7 eV 6.3 ± 0.3 [6] 48.4 eV 7.2 ± 0.4 [10] ∼ 38.5 eV 6.4, 8.8 a a Present work. From the fitting results, we conclude that the major peak centered at 6.4 eV can be attributed to two processes: (i) the dominant photodissociation peak centered at 6.3 eV (black solid curve) which represents a direct decay from the 1 1 ∆ state to the second dissociation limit of N + ( 1 D) + NO + ( 1 Σ + ), (ii) the second peak at 6.8 eV (green solid curve) is assigned to the direct dissociation of the 1 1 Σ + state to the same dissociation limit (L2).…”

Section: Projectilesmentioning

confidence: 99%

“…[4,5] A non-negligible de-nitrogenation channel originating from the Coulomb explosions of N 2 O 2+ has been reported recently. [5,6] After removal of two electrons from N 2 O induced by the solar radiation or charged particles from the space, the molecular dication N 2 O 2+ subsequently dissociates through four different fragmentation channels as follows: [6][7][8][9] N 2 O 2+ → N + + NO + (E L = 28.8 eV),…”

Section: Introductionmentioning

confidence: 99%

“…The KER of the de-nitrogenation channel of N 2 O 2+ induced in collisions with electrons, [7,[10][11][12] highly charged ions (HCIs), [8,13] and intense infrared laser fields [5,[14][15][16] have been extensively studied. Generally, the dissociation energy strongly depends on the molecular potential curves populated.…”

Section: Introductionmentioning

confidence: 99%

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Direct Coulomb explosion of N₂O²⁺ induced by monochromatic extreme ultraviolet photons at 38.5 eV*

et al. 2020

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The direct Coulomb explosion of N2O2+ has been investigated experimentally after double-ionization by a single extreme ultraviolet (EUV) photon with an energy of ∼ 38.5 eV. From the ion–ion time-of-flight coincidence spectrum, the de-nitrogenation (N2 O2+ → N+ + NO+) and de-oxygenation (N2O2+→ O+ + N2 +) photodissociation channels of N2O2+ are unequivocally identified. The measured kinetic energy release (KER) distribution of the de-nitrogenation channel presents a major peak accompanied by a shoulder structure. We find that the major peak can be attributed to the direct photodissociation of the 11Δ and 11Σ+ states, while the shoulder structure should be ascribed to the predissociation of the 11Σ and 11Σ+ states via 13Π state.

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Section: Resultscontrasting

confidence: 83%

Section: Introductionmentioning

confidence: 74%

Section: Projectilesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Direct Coulomb explosion of N₂O²⁺ induced by monochromatic extreme ultraviolet photons at 38.5 eV*

et al. 2020

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Charge-encoded multi-photoion coincidence for three-body fragmentation of CO2 in the strong laser fields

Zhang

Wang

Jiang

et al. 2022

The Journal of Chemical Physics

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The photoion–photoion coincidence (PIPICO) is a simple and effective approach for the selection of correlated fragments in a specific dissociating channel in molecules. We propose here a charge-encoded multi-photoion coincidence (cMUPICO) method, in analogy to traditional PIPICO, however in which the charge of individual fragments is taken into account. The cMUPICO method allows for clearly displaying coincident channels for dissociation channels containing three more fragments with unequal charge states, invisible in the traditional PIPICO. As a demonstration, three-body fragmentation dynamics of CO2 in strong IR laser fields is analyzed, and 11 dissociation channels are effectively identified, five of which are first found with cMUPICO. The present results show that cMUPICO is a powerful and practical tool for distinguishing various dissociation channels with multiply charged multi-photoions.

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Dissociative multi-ionization of N2O molecules in strong femtosecond laser field

Jiang

Wang

Zhang

et al. 2022

The Journal of Chemical Physics

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Multi-ionization and subsequent Coulomb explosion (CE) of the N2O molecule irradiated by linearly polarized 800 nm laser field is investigated by a reaction microscope, where a number of CE channels of N2Oq+ with q{less than or equal to}5 for two-body fragmentation and q{less than or equal to}8 for three-body fragmentation were observed. For two-body CE, by analyzing the internuclear separations extracted from kinetic energy releases (KERs), dissociation branching fractions, and laser intensity dependence, interestingly we found that fragmentation N2O5+→N3++NO2+ is produced directly from dissociating N2O3+ via non-sequential stairstep ionization whereas most of others result from the sequential stairstep ionization. For three-body CE, 25 fragmentation channels of N2Oq+ (q = 3-8) are distinguished in present charge-encoded multi-photoion coincidence plot and the concerted fragmentation mechanism is nominated in a typical Dalitz plot. With the help of the numerical computation with the measured KERs and momentum correlation angles, the geometric structures of molecular ions prior to fragmentation are reconstructed, which display the bending motion and simultaneous two-bond stretching before the CE. Increasing of bond length for high charged N2Oq+ indicates the dominating stairstep ionization in three-body fragmentation.

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Two-body fragmentation dynamics of N2Oq+ ( q=2,3

Cited by 8 publications

References 51 publications

Direct Coulomb explosion of N₂O²⁺ induced by monochromatic extreme ultraviolet photons at 38.5 eV*

Direct Coulomb explosion of N₂O²⁺ induced by monochromatic extreme ultraviolet photons at 38.5 eV*

Charge-encoded multi-photoion coincidence for three-body fragmentation of CO2 in the strong laser fields

Dissociative multi-ionization of N2O molecules in strong femtosecond laser field

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Two-body fragmentation dynamics of N2Oq+ ( q=2,3

Cited by 8 publications

References 51 publications

Direct Coulomb explosion of N2O2+ induced by monochromatic extreme ultraviolet photons at 38.5 eV*

Direct Coulomb explosion of N2O2+ induced by monochromatic extreme ultraviolet photons at 38.5 eV*

Charge-encoded multi-photoion coincidence for three-body fragmentation of CO2 in the strong laser fields

Dissociative multi-ionization of N2O molecules in strong femtosecond laser field

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Product

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Direct Coulomb explosion of N₂O²⁺ induced by monochromatic extreme ultraviolet photons at 38.5 eV*

Direct Coulomb explosion of N₂O²⁺ induced by monochromatic extreme ultraviolet photons at 38.5 eV*