Negative ions in space

TJ Millar, C Walsh, TA Field - Chemical reviews, 2017 - ACS Publications
Until a decade ago, the only anion observed to play a prominent role in astrophysics was H–
. The bound–free transitions in H–dominate the visible opacity in stars with photospheric …

R&D around a photoneutralizer-based NBI system (Siphore) in view of a DEMO Tokamak steady state fusion reactor

A Simonin, J Achard, K Achkasov, S Béchu… - Nuclear …, 2015 - iopscience.iop.org
Since the signature of the ITER treaty in 2006, a new research programme targeting the
emergence of a new generation of neutral beam (NB) system for the future fusion reactor …

H− photodetachment and radiative attachment for astrophysical applications

BM McLaughlin, PC Stancil… - Journal of Physics B …, 2017 - iopscience.iop.org
We combine R-matrix calculations, asymptotic relations, and comparison to available
experimental data to construct an H− photodetachment cross section reliable over a large …

Absolute cross sections and asymmetry parameters for photodetachment of

R Marion, KM Dunseath, M Terao-Dunseath, X Urbain - Physical Review A, 2021 - APS
Absolute total cross sections and asymmetry parameters for the photodetachment of the 4 S
o ground state of C− are reported for photon energies ranging from threshold to 6 eV. The …

Coupled cluster study of photoionization and photodetachment cross sections

BNC Tenorio, MAC Nascimento… - Journal of Chemical …, 2016 - ACS Publications
To simulate photoionization and photodetachment cross sections, as well as polarizability
dispersion profiles below the ionization threshold, a discretized (pseudo) spectrum …

Laser-induced photodetachment of negative oxygen ions in the spatial afterglow of an atmospheric pressure plasma jet

TJA Staps, TJM Donders, B Platier… - … Sources Science and …, 2022 - iopscience.iop.org
Negative ions are an important constituent of the spatial afterglow of atmospheric pressure
plasmas, where the fundamental plasma-substrate interactions take place that are vital for …

Absolute total, partial, and differential cross sections for photodetachment of

M Génévriez, KM Dunseath, M Terao-Dunseath… - Physical Review A, 2018 - APS
Absolute total, partial, and differential cross sections for the photodetachment of the oxygen
anion are reported for photon energies ranging from threshold (1.46 eV) to 5.5 eV. The total …

[HTML][HTML] Generation of neutral atomic beams utilizing photodetachment by high power diode laser stacks

AP O'Connor, F Grussie, H Bruhns… - Review of Scientific …, 2015 - pubs.aip.org
We demonstrate the use of high power diode laser stacks to photodetach fast hydrogen and
carbon anions and produce ground term neutral atomic beams. We achieve …

Saturation of the photoneutralization of a H− beam in continuous operation

D Bresteau, C Blondel, C Drag - Review of Scientific Instruments, 2017 - pubs.aip.org
An unprecedented, greater than 50%, photodetachment rate is obtained on a H− beam in
the continuous regime. The key element of the experimental setup is a medium-finesse …

Attosecond time delay in photoemission and electron scattering near threshold

AS Kheifets, AW Bray, I Bray - Physical Review Letters, 2016 - APS
We study the time delay in the primary photoemission channel near the opening of an
additional channel and compare it with the Wigner time delay in elastic scattering of the …