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Werbowy, S.; Pranszke, B.

doi:10.1103/physreva.93.022713

Cited by 8 publications

(4 citation statements)

References 35 publications

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“…However, it is not clear that the latter cross section is applicable to interactions with atmospheric gas. Experimentally, cross sections for charge transfer onto slow ions in gaseous CO and CO 2 are much larger, of order 10 −16 cm 2 [73]. The corresponding mean free path in the atmosphere is microscopic.…”

Section: )mentioning

confidence: 99%

Direct detection of primordial black hole relics as dark matter

Lehmann

Johnson

Profumo

et al. 2019

J. Cosmol. Astropart. Phys.

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If dark matter is composed of primordial black holes, such black holes can span an enormous range of masses. A variety of observational constraints exist on massive black holes, and black holes with masses below 10 15 g are often assumed to have completely evaporated by the present day. But if the evaporation process halts at the Planck scale, it would leave behind a stable relic, and such objects could constitute the entirety of dark matter. Neutral Planck-scale relics are effectively invisible to both astrophysical and direct detection searches. However, we argue that such relics may typically carry electric charge, making them visible to terrestrial detectors. We evaluate constraints and detection prospects in detail, and show that if not already ruled out by monopole searches, this scenario can be largely explored within the next decade using existing or planned experimental equipment. A single detection would have enormous implications for cosmology, black hole physics, and quantum gravity.

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Section: )mentioning

confidence: 99%

Direct detection of primordial black hole relics as dark matter

Lehmann

Johnson

Profumo

et al. 2019

J. Cosmol. Astropart. Phys.

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“…Ion–molecule collisions are prevalent in various environments like interstellar medium, plasma, and combustion. − Long-range interactions play a significant role in the dynamics of ion–molecule reactions, which lead to inelasticity or large reactive scattering cross sections, especially at low temperatures or low collision energies . An accurate description of long-range interactions is essential for theoretical studies of low-temperature ion–molecule collisions.…”

Section: Introductionmentioning

confidence: 99%

Energy- and Local-Gradient-Based Neural Network Method for Accurately Describing Long-Range Interaction: Application to the H₂ + CO⁺ Reaction

Xiang

Tian

et al. 2022

J. Phys. Chem. A

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The long-range interaction plays an important role in theoretically describing ion−molecule reaction. However, most energy-based neural network fitting methods usually introduce spurious long-range interactions. In this work, we propose an energy-and local-gradient-based neural network (ELGNN) method to fit potential energy surfaces (PESs). K-means clustering is employed to divide the whole configuration space into three regions: reactant asymptotic region, interaction region, and product asymptotic region. In the interaction region, only the energies of sampled points are computed, while in the asymptotic regions, the gradients of partially sampled configurations are calculated as well, and both the energies and energy gradients (if necessary) are used to fit long-range interactions. These regions are joined together by switching functions. The ELGNN method is first applied to fit the PES of the H 2 + CO + reaction, which has significant long-range interactions. It is found that the ELGNN method works better than the energy-based NN method in describing longrange interactions. The dynamics and kinetics of the reaction are then investigated on the new PES.

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“…Таким образом, структура электронных уровней иона O + , образующегося в процессе захвата, и определяет доминирующую роль процесса диссоциативного захвата одного электрона. Качественный анализ, основанный на рассмотрении дефекта энергии процесса, показывает, что для однозарядных налетающих ионов этот эффект должен наблюдаться для ионов He + [30] и для Ne + , для которых это и показано экспериментально [8]. Кроме того, для указанных выше ионов следует ожидать доминирующей роли процесса диссоциативного захвата при взаимодействии с молекулами N 2 и O 2 .…”

Section: заключениеunclassified

Процессы Захвата И Диссоциативного Захвата Одного Электрона При Взаимодействии Двухзарядных Ионов С Молекулами CO

Басалаев¹,

Кузьмичев²,

Панов³

et al. 2019

Журнал Технической Физики

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The absolute cross sections of single-electron capture and single-electron capture with dissociation in the interaction between incident He^2+, C^2+, N^2+, and O^2+ ions with energies from 6.4 to 36.4 keV and СО molecules were measured. It is demonstrated that the cross section of dissociative capture is much larger than the cross section of single-electron capture for O^2+ projectile ions. A qualitative explanation for this effect is provided.

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Charge-exchange processes in collisions ofH+,H2+,H3<

Cited by 8 publications

References 35 publications

Direct detection of primordial black hole relics as dark matter

Direct detection of primordial black hole relics as dark matter

Energy- and Local-Gradient-Based Neural Network Method for Accurately Describing Long-Range Interaction: Application to the H₂ + CO⁺ Reaction

Процессы Захвата И Диссоциативного Захвата Одного Электрона При Взаимодействии Двухзарядных Ионов С Молекулами CO

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Charge-exchange processes in collisions ofH+,H2+,H3<

Cited by 8 publications

References 35 publications

Direct detection of primordial black hole relics as dark matter

Direct detection of primordial black hole relics as dark matter

Energy- and Local-Gradient-Based Neural Network Method for Accurately Describing Long-Range Interaction: Application to the H2 + CO+ Reaction

Процессы Захвата И Диссоциативного Захвата Одного Электрона При Взаимодействии Двухзарядных Ионов С Молекулами CO

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Energy- and Local-Gradient-Based Neural Network Method for Accurately Describing Long-Range Interaction: Application to the H₂ + CO⁺ Reaction