Electron emission in fast heavy ion impact ionization of C60 and Ne: giant plasmon excitation

Kelkar, Aditya H.; Misra, Deepankar; Gulyás, László; Tribedi, Lokesh C.

doi:10.1140/epjd/e2020-10139-y

Cited by 5 publications

(2 citation statements)

References 45 publications

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“…The sensitizing factor or radiobiological effectiveness for the isolated Pt atom attached in a plasmid DNA is found to be ≈ 1.6 [21] and that for inserted Au NP is ≈ 2.0 [22]. The influence of plasmon excitation to provide enhancement in e-emission has been addressed in experiments involving C 60 -fullerene [24][25][26] as well as in models involving metal nanopartciles by Solovyov and coworkers [2,27]. This model has also predicted enhancements due the atomic giant resonance (GDR) for which there has not been any quantitative measurement.…”

Section: Introductionmentioning

confidence: 99%

Radiobiological effectiveness of iodouracil and the influence of atomic giant resonance

et al. 2020

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Hadron therapy combined with nanotechnology has been proposed as an elegant alternative for cancer treatment. Internal amplification of electron emission causing radiobiological effectiveness in nanoinserted biomolecules is of prime importance and has been measured here for the iodouracil molecule. Our experiment involves the measurement of angle and energy resolved double differential cross section (DDCS) of electron emission from iodouraciil and uracil (and also water) in collisions with fast C 6+ ions. The electron emission from iodouracil is substantially enhanced over that from uracil or water. The enhancement is much larger than the state-of-the-art model for Coulomb ionization based on the continuum distorted wave-eikonal initial state (CDW-EIS) approximation. The electron sensitizing factor (≈ 2.4) is in excellent agreement with the strand-breaking sensitizing factor (≈ 2.0) for metal nanoparticle embedded in a DNA. The enhancement is explained in terms of collective excitation of strongly correlated 4d electrons, known as atomic giant dipole resonance (GDR) in I atoms. The GDR contribution to the enhancement is derived, which is in excellent agreement with recent theoretical prediction, thereby providing conclusive experimental evidence of the crucial role of collective excitation in radio sensitization.

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Section: Introductionmentioning

confidence: 99%

Radiobiological effectiveness of iodouracil and the influence of atomic giant resonance

et al. 2020

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“…Impact force diagram at different impact locations Figure 7 shows the impact force diagrams with axial pressures of 0kN, 2500kN, 5000kN, and 7500kN, respectively [12]. It can be seen from the figure that with the increase of the axial pressure, the maximum impact force decreases slightly, and the impact time also decreases.…”

Section: Figurementioning

confidence: 98%

Mathematical Differential Equation in Calculating the Strength of Building Beam Structure Impact Resistance

Chen

Mohamed

2022

Applied Mathematics and Nonlinear Sciences

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This paper establishes a numerical simulation model of the impact resistance of building beam structures by using differential equations. The model fully considers the bolt preload, contact, large nonlinear deformation, and strain rate effect of the building beam structure. The paper establishes and deduces the calculation formulas of the impact force and the lateral displacement of the beam. The study found that under the impact load of the same strength, the failure form of the building beam structure is serious at the assembly point. The local macro/microsimulation results agree with the experimental results. The paper's results verify the rationality and effectiveness of the numerical method in this paper.

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K-LL Auger electron angular distribution and absolute cross section measurement upon keV energy electron impact ionization of CH4, N2 and Ne

Kelkar

Tribedi

2022

Journal of Electron Spectroscopy and Related Phenomena

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Electron emission in fast heavy ion impact ionization of C60 and Ne: giant plasmon excitation

Cited by 5 publications

References 45 publications

Radiobiological effectiveness of iodouracil and the influence of atomic giant resonance

Radiobiological effectiveness of iodouracil and the influence of atomic giant resonance

Mathematical Differential Equation in Calculating the Strength of Building Beam Structure Impact Resistance

K-LL Auger electron angular distribution and absolute cross section measurement upon keV energy electron impact ionization of CH4, N2 and Ne

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