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Atoms, Volume 7, Issue 3

September 2019 - 34 articles

Cover Story: Quantum interference between the direct and looping reaction pathways determines the outcome of the ultracold O + OH → H + O₂ reaction. In the ultracold regime, the interference can approach its maximal constructive or destructive values, effectively turning the reaction on or off (a quantum switch!). This is due to the unique properties of ultracold collisions, where the scattering phase shifts approach integer multiples of π (the integer corresponds to the number of bound states supported along each pathway). The geometric phase associated with the C2v conical intersection introduces an additional π-phase shift between the two interfering pathways, which reverses the nature of the interference (constructive ↔ destructive) and in this way controls the reaction. View this paper.

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Articles (34)

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Article

6 Citations

4,602 Views

17 Pages

Laser-Plasma and Self-Absorption Measurements with Applications to Analysis of Atomic and Molecular Stellar Astrophysics Spectra

Christian G. Parigger,
Christopher M. Helstern and
Ghaneshwar Gautam

Atoms2019, 7(3), 63;https://doi.org/10.3390/atoms7030063

1 July 2019

This work discusses laboratory measurements of atomic and diatomic molecular species in laser-plasma generated in gases. Noticeable self-absorption of the Balmer series hydrogen alpha line occurs for electron densities of the order of one tenth of st...

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Article

5 Citations

4,059 Views

13 Pages

Measurements of Gaseous Hydrogen–Nitrogen Laser-Plasma

Christian G. Parigger

Atoms2019, 7(3), 61;https://doi.org/10.3390/atoms7030061

29 June 2019

This work communicates laser-plasma experiments in a gaseous mixture of hydrogen and nitrogen. Time-resolved spectroscopy measures the first four Balmer-series hydrogen lines together with selected neutral and ionized nitrogen lines. Optical breakdow...

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Article

7 Citations

3,579 Views

8 Pages

Towards the Search for Thallium Nuclear Schiff Moment in Polyatomic Molecules: Molecular Properties of Thallium Monocyanide (TlCN)

A. V. Kudrin,
A. Zaitsevskii,
T. A. Isaev,
D. E. Maison and
L. V. Skripnikov

Atoms2019, 7(3), 62;https://doi.org/10.3390/atoms7030062

29 June 2019

Molecular properties of the thallium monocyanide (Tl·CN) system in its ground electronic state are studied using high-precision ab initio relativistic two-component pseudopotential replacing 60 inner-core electrons of Tl. A relativistic coupled-clust...

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Article

7 Citations

4,204 Views

11 Pages

The Electron Impact Ionization Cross Sections of Methanol, Ethanol and 1-Propanol

Yogesh Kumar,
Manoj Kumar,
Sachin Kumar and
Rajeev Kumar

Atoms2019, 7(3), 60;https://doi.org/10.3390/atoms7030060

26 June 2019

In the present investigation, the plane-wave Born approximation was employed to calculate the total ionization cross sections by electron impact of methanol, ethanol and 1-propanol from the threshold of ionization to 10 MeV. This method requires cont...

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