A. K. Gupta
Bhabha Atomic Research Centre
10 Papers
50 Citations
A. K. Gupta is an academic researcher from Bhabha Atomic Research Centre. The author has contributed to research in topics: Collisional excitation & Dissociation (chemistry). The author has an hindex of 5, co-authored 10 publications.
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Papers
Formation of nitrogen-substituted carbon cluster anions by gas-feed Cs-sputtering from different forms of carbon
A. K. Gupta,Pushan Ayyub +1 more
TL;DR: In this article, the authors investigated the mechanism of formation of Cn- and CnN- cluster anions during Cs+-ion sputtering from surfaces of different crystallographic forms of carbon (polycrystalline graphite, amorphous C and C60), in the presence of high purity N2 or NO2 gas.
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Probing the influence of channel coupling on the photoelectron angular distribution for the photodetachment from Cu
TL;DR: In this paper, the influence of channel coupling on the photoelectron angular distribution for photon energies above 35 eV was investigated for a velocity map imaging spectrometer, and the experimental results showed no significant influence of the channel-coupling effect on the photodetachment cross section in the photon energy range of 346-46 eV.
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Probing electronic states of TaC and observation of a stable excited state of TaC − by anion-photoelectron spectroscopy
TL;DR: In this paper, the experimental value of electron affinity for TaC was reported to be 1.928(0.056) eV by performing photodetachment of its anion at 355 nm.
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Fragmentation of cesium-carbon cluster anions CsC{sub n}{sup -} (n{<=}10)
A. K. Gupta,M. Krishnamurthy +1 more
TL;DR: An unexpected oscillatory pattern is found in the kinetic-energy release (KER) spectra of C{sub n}{sup -} fragments, which finds that the KER in the c.m. frame oscillates if an ion-pair formation pathway is preferred for clusters of even n.
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COLLISIONAL DESTRUCTION OF (n = 1 TO 4, 6) ANIONS OF ASTROPHYSICAL RELEVANCE
M. Nrisimhamurty,R. G. Mane,Roby Chacko,A. K. Gupta,Pranawa C. Deshmukh,Pranawa C. Deshmukh,G. Aravind +6 more
TL;DR: In this paper, the stability of FeC− against dissociation in an astrophysical environment was probed by the collisional excitation of Fe− and C− fragments through measurement of the kinetic energy released during fragmentation.
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