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Absolute cross sections for the formation of OH- from 2-propanol (CH3CH(OH)CH3) via dissociative electron attachment (DEA) are reported in the incident electron energy range of 3.5-13 eV. Four fragment anions are observed: OH-, C2H2O-,…

原子物理 · 物理学 2026-02-20 Siddique Ali , Meeneskhi Rana , Soumya Ghosh , Narayan Kundu , Aryya Ghosh , Dhananjay Nandi

We report the detailed dynamics of the site selectivity observed in the dissociative electron attachment (DEA) process in ethanol based on the momentum images obtained using the velocity slice imaging technique. The H- dissociation channel…

化学物理 · 物理学 2023-08-15 Sukanta Das , Suvasis Swain , Vaibhav S. Prabhudesai

In this paper, we discuss the dissociative electron attachment process in Formic Acid and Propyl Amine. These are molecules containing more than one functional group and have low symmetry (Cs group). We measured the kinetic energy and…

化学物理 · 物理学 2010-07-30 N. Bhargava Ram , E. Krishnakumar

Exploring the molecular fragmentation dynamics induced by low-energy electrons offers compelling insights into the complex interplay between the projectile and target. In this study, we investigate the phenomenon of dissociative electron…

原子与分子团簇 · 物理学 2024-01-05 Anirban Paul , Ian Carmichael , Dhananjay Nandi , Sylwia Ptasinska , Dipayan Chakraborty

In the present paper, we report the details of the kinetic energy and angular distributions of the H^{-}, S^{-}/SH^{-} fragment ions produced due to dissociative electron attachment in H_{2}S molecules at resonances peaking at 2.2 eV, 5.2…

化学物理 · 物理学 2010-07-30 N. Bhargava Ram , E. Krishnakumar

In this paper, we discuss the dissociative electron attachment process in Ammonia. Kinetic energy and angular distributions of H^{-} and NH_{2}^{-} fragment anions across the two well known resonances at 5.5 eV and 10.5 eV are reported. The…

化学物理 · 物理学 2010-07-30 N. Bhargava Ram , E. Krishnakumar

We report on the fragmentation of the water molecule by $1$ MeV H$^{+}$, He$^{+}$ and 650 keV N$^{+}$ ion impact. The fragment-ion energy spectra were measured by an electrostatic spectrometer at different observation angles. The obtained…

原子物理 · 物理学 2017-09-13 S. T. S. Kovács , P. Herczku , Z. Juhász , L. Sarkadi , L. Gulyás , B. Sulik

Absorption cross-sections for the 5th (6 $\leftarrow$ 0) and 6th (7 $\leftarrow$ 0) OH overtones for gas-phase methanol, ethanol, and isopropanol were measured using a slow flow cell and Incoherent Broadband Cavity-Enhanced Absorption…

大气与海洋物理 · 物理学 2024-11-26 Callum E. Flowerday , Nitish Bhardwaj , Ryan Thalman , Matthew C. Asplund , Eric T. Sevy , Jaron C. Hansen

In this paper, we discuss the dissociative electron attachment process in Methane. Kinetic energy and angular distributions of H^{-} and CH_{2}^{-} fragment anions across the broad resonance about 10 eV is reported. Angular distribution of…

化学物理 · 物理学 2010-07-30 N. Bhargava Ram , E. Krishnakumar

The optical emission spectrum of acetylene excited by monoenergetic electrons was studied in the range of 190 nm to 660 nm. The dissociative excitation and dissociative ionization associated with excitation of the ions initiated by electron…

原子物理 · 物理学 2022-12-12 Juraj Országh , Marián Danko , Peter Čechvala , Štefan Matejčík

Complete dissociation dynamics of low energy electron attachment to ammonia molecule has been studied using velocity slice imaging (VSI) spectrometer. One low energy resonant peak around 5.5 eV and a broad resonance around 10.5 eV incident…

原子与分子团簇 · 物理学 2019-09-11 Dipayan Chakraborty , Aranya Giri , Dhananjay Nandi

Using the velocity map imaging technique, we studied and characterized the process of Dissociative Electron Attachment (DEA) in polyatomic molecules like Water, Hydrogen Sulphide, Ammonia, Methane, Formic Acid and Propyl Amine. We present…

化学物理 · 物理学 2010-07-30 N. Bhargava Ram , V. S. Prabhudesai , E. Krishnakumar

Motivated by the huge need of data for non-equilibrium plasma modeling, a theoretical investigation of dissociative electron attachment to the NO molecule is performed. The calculations presented here are based on the…

原子物理 · 物理学 2020-12-02 V. Laporta , I. F. Schneider , J. Tennyson

We report the results of a joint experimental {and} theoretical study of dissociative electron attachment to formic acid (HCOOH) in the 6-9 eV region, where H$^-$ fragment ions are a dominant product. Breaking of the CH and OH bonds is…

Complete dissociation dynamics of low-energy electron attachment to carbon disulfide have been studied using the velocity slice imaging (VSI) technique. The ion yields of S- and CS- fragment ions as the function of incident electron energy…

原子与分子团簇 · 物理学 2022-09-28 Anirban Paul , Dhananjay Nandi

The presence of methyl alcohol or methanol (CH$_3$OH) in several astrophysical environments has been characterized by its high abundance that depends on both the production rate and the destruction rate. In the present work, the…

天体物理学 · 物理学 2008-11-26 S. Pilling , R. Neves , A. C. F. Santos , H. M. Boechat-Roberty

The formation of $O^{-}$ and $O_{2}^{-}$ ions via dissociative electron attachment to a pulsed supersonic jet of $O_{2}$ molecules containing weakly bound small van der Waals clusters seeded in a beam of argon is reported. The energy…

原子与分子团簇 · 物理学 2019-02-15 Irina Jana , Varun Ramaprasad , Dhananjay Nandi

Kinetic energy and angular distributions of O$^-$ ions formed by dissociative electron attachment to CO molecule have been studied for 9, 9.5, 10, 10.5, 11, 11.5 eV incident electron energies around the resonance using time sliced velocity…

原子与分子团簇 · 物理学 2015-02-10 Pamir Nag , Dhananjay Nandi

We report measurements on the H$^{+}$ + H$^{+}$ fragmentation channel following direct single-photon double ionization of neutral NH$_{3}$ at 61.5 eV, where the two photoelectrons and two protons are measured in coincidence using 3-D…

Complete dissociation dynamics of low energy electron attachment to nitrogen dioxide around 8.5 eV resonance has been studied using a velocity map imaging (VMI) spectrometer. Besides the three prominent resonant peaks at around 1.4 eV, 3.1…

原子与分子团簇 · 物理学 2023-04-25 Anirban Paul , Dipayan Biswas , Dhananjay Nandi
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