Formation of negative ions in collisions between Rydberg atoms and neutral particles

Buslov, E. Yu.; Zon, B. A.

doi:10.1103/physreva.85.042709

Cited by 18 publications

(24 citation statements)

References 22 publications

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“…The physical explanation of this phenomenon was given by [24] and has been recently studied in detail in [25][26][27][28][29]. We now recall the main results.…”

Section: Formation Via Rydberg Charge Exchangementioning

confidence: 79%

“…More precisely, the experimental formation rate, [24,26,27]. The total cross section slightly depends on the relative velocity of the reactants, which is shown in figure 4 using the formula from [25].…”

Section: Formation Via Rydberg Charge Exchangementioning

confidence: 99%

“…The formula for the cross section used here, provided by [25], is based on an s-orbital anion wave function, dipole approximation, and a zero-range pseudopotential model for the interaction between the excess electron and the anion core. It is sufficient for our purposes and enough to provide a qualitative description of the ionpair formation.…”

Section: Formation Via Rydberg Charge Exchangementioning

confidence: 99%

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Universal deceleration of highly polar molecules

et al. 2015

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We propose a method to produce, in a pulsed or continuous way, cold samples of highly polar molecules. Using a pulsed or continuous standard (supersonic) beam of these molecules, our idea consists of transforming the molecules into their anionic counterparts, which are decelerated to a standstill by a well-controlled external electric field and ultimately neutralized. The neutral-to-anion transformation occurs through collisions with Rydberg atoms coming from an additional atomic beam. This Rydberg electron transfer process is possible provided that the molecular species has a sufficiently strong electric dipole (>2.5 D, i.e., > × − 8.3 10 30 cm). Whatever the mass of the species, the deceleration stage is realized by a temporally and spatially controlled electric field within a range of less than one centimeter, which is much shorter than in current deceleration experiments of neutral molecules. Once stopped, the molecular anions are neutralized by laser photodetachment or a pulsed electric field process. The resulting molecules might be held and accumulated, for instance, in a magnetic trap.

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“…The physical explanation of this phenomenon was given by [24] and has been recently studied in detail in [25][26][27][28][29]. We now recall the main results.…”

Section: Formation Via Rydberg Charge Exchangementioning

confidence: 79%

Section: Formation Via Rydberg Charge Exchangementioning

confidence: 99%

Section: Formation Via Rydberg Charge Exchangementioning

confidence: 99%

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Universal deceleration of highly polar molecules

et al. 2015

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“…However, even recent articles about chemi-ionization refrain from describing IPP, emphasizing the other two processes (Klyucharev 1993;Mihajlov et al 2012). Working from a semi-classical description of the Ca on Ne* reaction by Buslov and Zon (2012), we derived a description of IPP providing the optimal excitation for any electron donor element in collisions creating anions from any element having a positive electron affinity (Vogel 2018) While the electron transfer is nearly resonant between halogens and ground state alkalis explored in the 1970s, the reaction overall is endoergic, requiring a kinetic input up to 0.5 eV for making the oxygen anion, for example.…”

Section: Introductionmentioning

confidence: 99%

Ion-pair Ionization in CO₂-fed Cesium Sputter Sources

Vogel¹,

Stolz

2019

Radiocarbon

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A collision-radiation model of the solid sample cesium sputter ion source led to the rediscovery of anion production by ion-pair production. The model revealed physical processes that may produce high current outputs from such sources and suggested new ways of obtaining high outputs at lower heat and conductive stress to the source. Primary among these solutions is the electron excitation of primary Cs0 recycled from the sample to provide states that efficiently create chosen anions. Here we look at how the processes might apply to gas-fed ion sources.

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“…The collision processes include Penning ionization [1][2][3][4][5], associative ionization [2], and the formation of quasimolecules [6][7][8], which are of great importance in many areas of physics, such as gaseous lasers, low-temperature plasmas, astrophysics, and radiation physics. The excited noble-gas atoms can be metastable atoms, optically allowed excited atoms [9], or Rydberg atoms [10][11][12] such as He(14 1 P , 15 1 …”

mentioning

confidence: 99%