We report the experimental value of electron affinity for TaC to be 1.928(0.056) eV by performing photodetachment of its anion at 355 nm. An excited-electronic state of the anion, stable against autodetachment, is observed lying 0.828 eV above the ground-electronic state. Five low-lying electronic states of TaC are observed and identified by comparison with restricted second-order configuration interaction (SOCI) calculations. Vibrational frequencies for the electronic states are obtained from the analysis of the measured data. We also present the results of density functional theory (DFT) calculations performed on the adiabatic electron affinity, yielding a value of 1.9236 eV and vertical detachment energy value of 1.924 eV. © 2015 American Physical Society.

G Aravind

Department Of Physics

Density functional theory

Electron affinity

Electronic states

Ions

Negative ions

Photoelectron Spectroscopy

ADIABATIC ELECTRON AFFINITY

ANION PHOTOELECTRON SPECTROSCOPY

Configuration interactions

EXCITED ELECTRONIC STATE

Experimental values

Ground electronic state

LOW LYING ELECTRONIC STATE

VERTICAL DETACHMENT ENERGIES

Excited states

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IIT Madras

Physical Review A - Atomic, Molecular, and Optical Physics

Depletion of FeO in the interstellar medium through resonance states of FeO- was studied through collision-induced dissociation of FeO-. Collisional excitation of FeO- lead to the yield of Fe- and O-, with a higher yield for Fe-. The ground electronic state of FeO- was identified to be 6Δ state and the results are compared with previous theoretical and experimental results. The kinetic energy distributions of the fragments revealed two FeO- anion resonances accessed upon excitation and their potential energy curves were evaluated. The role of the observed resonances in the depletion of FeO and the viable presence of Fe- and O- in Sagittarius B2 are discussed. © 2018. The American Astronomical Society. All rights reserved.

Fulltext

Astrophysical Journal

Depletion of FeO in the Interstellar Medium via Its Anion Resonances

The stability of FeC- against dissociation in an astrophysical environment was probed by the collisional excitation of FeC-. Two anion resonances yielding Fe- and C- fragments were observed and studied through measurement of the kinetic energy released during fragmentation. The yield of Fe- was found to be nearly 5.5 times more than that of C- indicating the C- fragment to be in the loosely bound (2D) state. The possibility of avoided crossing leading to the observed fragment ion yield is also discussed. The dissociation of FeCn(n = 2 to 4, 6) cluster anions predominantly resulted in the cleavage of Fe-C bond yielding only fragments with similar energy release. The yield of Cn is discussed in the light of the observed abundances of HCn in IRC+10216. The importance of rotational transitions pertaining to both the ground and excited-electronic states of these cluster anions is discussed. © 2016. The American Astronomical Society. All rights reserved..

COLLISIONAL DESTRUCTION of FeCn (n = 1 to 4, 6) ANIONS of ASTROPHYSICAL RELEVANCE

The Journal of Physical Chemistry A

Slow Photoelectron Velocity-Map Imaging Spectroscopy of the ortho-Hydroxyphenoxide Anion

The Journal of Chemical Physics

Photoelectron imaging spectroscopy of MoC− and NbN− diatomic anions: A comparative study

The Astrophysical Journal

ELECTRONIC TRANSITIONS OF JET-COOLED SiC2, Si2Cn(n=1−3), Si3Cn(n= 1,2), AND SiC6H4BETWEEN 250 AND 710 nm

Journal of the American Chemical Society

Vibrational and Electronic Structure of the α- and β-Naphthyl Radicals via Slow Photoelectron Velocity-Map Imaging

Low-Lying Electronic States of Cyclopentadienone

Probing electronic states of TaC and observation of a stable excited state of TaC- by anion-photoelectron spectroscopy

Journal	Data powered by TypesetPhysical Review A - Atomic, Molecular, and Optical Physics
Publisher	Data powered by TypesetAmerican Physical Society
ISSN	10502947
Open Access	No