Three-fragment dissociation of 
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Jiang, Tsin-Fu; Wang, B.; Zhang, Y.; Wei, Long; Chen, S.; Yu, Wandong; Zou, Yaming; Chen, L.; Wei, Bingchen

doi:10.1103/physreva.100.022705

Cited by 16 publications

(4 citation statements)

References 34 publications

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“…The Pb 53+ (4p 1/2 -4s 1/2 ) energy splitting of ∼ 118 eV is determined with an accuracy of about 10 −3 eV, which provides a test of QED in a many-body environment. In addition, precise determination of the 4s 1/2 and 4p 1/2 levels for the two isotopes of 208,207 Pb 53+ demonstrated the potential of DR spectroscopy to measure isotope shifts. The above works were mostly car-ried out before 2010, then there was a plan to combine the ESR and CRYRING along with the availability of heavy bare, oneand few-electron ions and exotic nuclei, which will open a new field of research under extreme conditions.…”

Section: Precision Spectroscopy Of Hcismentioning

confidence: 99%

“…This signature agrees with the simultaneous dissociation. So far, the investigation of HCIs-induced fragmentation has been extended to other molecules like N 2 O, [204] OCS, [205] and small organic molecules like C 2 H 2 , [206,207] C 2 H 4 , [208] and C 3 H 4 [209][210][211] It was found that fragmentation mechanisms and their corresponding branching ratios are dependent on the incident energy, charge state of the HCIs, and excitation state of the parent molecular ion. [203,212,213] For instance, if a molecule is triply or quadruply ionized, and the generated molecular ion lies in low excited states, the subsequent decay pathway tends to be sequential dissociation.…”

Section: Fragmentation Dynamics In Collisions Of Ions With Molecules ...mentioning

confidence: 99%

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Atomic structure and collision dynamics with highly charged ions

Ma¹,

Zhang²,

Wen³

et al. 2022

Chinese Phys. B

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The research progresses on the investigations of atomic structure and collision dynamics with highly charged ions based on the heavy ion storage rings and electron ion beam traps in recent 20 years are reviewed. The structure part covers test of quantum electrodynamics and electron correlation in strong Coulomb field studied through dielectronic recombination spectroscopy and VUV/x-ray spectroscopy. The collision dynamics part includes charge exchange dynamics in ion-atom collisions mainly in Bohr velocity region, ion induced fragmentation mechanisms of molecules, hydrogen-bound and van de Waals bound clusters, interference and phase information observed in ion-atom/molecule collisions. With this achievements, two aspects of theoretical studies related to low energy and relativistic energy collisions are presented. The applications of data relevant to key atomic processes like dielectronic recombination and charge exchanges involving highly charged ions are discussed. At end of this review, some future prospects of research related to highly charged ions are proposed.

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Section: Precision Spectroscopy Of Hcismentioning

confidence: 99%

Section: Fragmentation Dynamics In Collisions Of Ions With Molecules ...mentioning

confidence: 99%

Atomic structure and collision dynamics with highly charged ions

Ma¹,

Zhang²,

Wen³

et al. 2022

Chinese Phys. B

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“…On the other hand, although the three-body fragmentation dynamics of triply charged molecular ions such as CO 2 3+ [20][21][22], CS 2 3+ [23], SO 2 3+ [24], C 2 H 2 3+ [25,26], and CH 2 CCH 2 3+ [27] has been extensively studied, the dissociation dynamics of the high-symmetry molecules such as CF 4 and the evidence of geometry deformation of its cation still capture many interests. In its ground states, CF 4 has a tetrahedral structure with T d symmetry.…”

Section: Introductionmentioning

confidence: 99%

Fragmentation of CF4q+ (q=2,3)<

et al. 2021

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We report on an investigation on the fragmentation dynamics of CF 4 q+ (q = 2, 3) induced by 1-keV electron collisions utilizing an ion momentum imaging spectrometer. From the time-of-flight correlation maps five dominating dissociation channels of CF 42+ as well as one three-body fragmentation channel of CF 4 3+ are identified. The kinetic energy release (KER) distributions for these channels are obtained and compared with the data available in the literature. The Dalitz-like momentum diagram and the Newton diagram are employed to analyze the breakup mechanism in the three-body fragmentation channel. We found that, for CF 4 2+ dissociation into F + + CF 2 + + F, F + + CF + + 2F, and F + + F + + CF 2 , the concerted breakup is the dominating process. Channel C + + F + + 3F is dominated by the initial charge separation, i.e., CF 4 2+ → F + + CF + + 2F → C + + F + + 3F. With the help of the native frame method, we assigned one sequential pathway and two concerted pathways for channel CF 4 3+ → F + + F + + CF 2 + . The branching ratios of these pathways are determined. The momentum correlation of the fragments and the deduced KER distribution indicate that different excited states of CF 4 3+ with different geometries are responsible for these three pathways. The Coulomb explosion model simulation shows that most of the events in this channel are produced by CF 4 3+ ions that have deformed geometries from the neutral CF 4 molecule.

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“…two-body fragmentation), but for a three-body breakup, measurement of the fragment emission angle alone is insufficient, because there could be step-by-step or simultaneous breaking of the two bonds (sequential and concerted fragmentation). The widely used methods for separation of these pathways are based on the visual representation of correlated momentum distributions of the fragments using Newton diagrams and Dalitz plots [5][6][7][8][9][10][11]. Recently, a new representation based on the angular correlation of fragments has been used by Rajput et al [12], Kumar et al [13] and Wales et al [14] for the same purpose in the case of OCS.…”

Section: Introductionmentioning

confidence: 99%

Triple ionisation of OCS: orientation dependence in the case of ion impact

Sharma

Bapat

Bhatt

et al. 2020

J. Phys. B: At. Mol. Opt. Phys.

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The dependence of the cross-section for multiple ionisation on the orientation of free molecules with respect to the incident projectile has long been demonstrated in the case of diatomic molecules. The dependence has been studied via the coincidence momentum imaging technique, where, under the axial recoil approximation, the orientation of the molecule with respect to the incident projectile is determined from the measured momentum vectors of fragments, which, for diatomic molecules, are necessarily emitted back-to-back. The case of triatomic molecules is complicated owing to the possibility of simultaneous or step-wise breaking of the two bonds, precluding a simple mapping of the fragment momentum vectors to the initial orientation. We report a measurement of triple ionisation of an asymmetric triatomic molecule, OCS, which clearly shows, that the process indeed has an orientation dependence similar to that in diatomic molecules. As expected from the studies on diatomic molecules, the dependence is stronger for small values of q/v and negligible for large values of q/v, where q and v are the projectile charge and velocity, respectively.

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Three-fragment dissociation of C2H22+ and C2

Cited by 16 publications

References 34 publications

Atomic structure and collision dynamics with highly charged ions

Atomic structure and collision dynamics with highly charged ions

Fragmentation of CF4q+ (q=2,3)<

Triple ionisation of OCS: orientation dependence in the case of ion impact

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