Electronic processes in energetic ion-atom collisions

Stolterfoht, N.

doi:10.1007/3-540-18732-4_101

Cited by 5 publications

(8 citation statements)

References 55 publications

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“…In a typical measurement, Mowat et a1 (1979) determined the energy of a transition in Li-like Mg with an uncertainty of 5.5 x Since these and other methods have been described in several reviews, see e.g. Kauffman and Richard (1976), Schartner (1979), Hopkins (1980) and Stolterfoht (1983), only a few more recent references need be added here. The application of a Johann-type crystal spectrometer to x-ray spectroscopy of vacuum-spark plasmas has been described by Morita and Fujita (1985).…”

Section: Photon Spectroscopymentioning

confidence: 99%

“…Electron spectroscopy of the latter instead involves the use of ion beams which interact with a foil or gas target. It is convenient to divide the work into projectile and target electron (or Auger) spectroscopy (Stolterfoht 1987). In the former case the electron emission from highly charged, collisionally excited fast ions is measured, whereas target spectroscopy involves studies of highly charged recoil ions.…”

Section: Electron Spectroscopymentioning

confidence: 99%

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The spectroscopy of highly ionised atoms

Martinson

1989

Rep. Prog. Phys.

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Spectroscopic investigations of the structure of highly ionised atoms have undergone significant developments in recent years. The experimental progress is largely due to the introduction of several powerful light sources, such as laser-produced plasmas, Tokamaks and beams of fast, excited ions. The results obtained with these laboratory devices complement the data from astrophysical observations of the solar corona and solar flares.The experimental techniques are described in some detail. The results are discussed with respect to energy level studies along isoelectronic sequences, inner-shell excited levels, forbidden transitions, lifetimes and transition probabilities as well as the results of spectroscopic studies of quantum electrodynamics, QED. The experimental results are compared with theoretical predictions.

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Section: Photon Spectroscopymentioning

confidence: 99%

Section: Electron Spectroscopymentioning

confidence: 99%

The spectroscopy of highly ionised atoms

Martinson

1989

Rep. Prog. Phys.

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“…When high-energy charged particles collide with high-Z element nanoparticles, a variety of secondary radiation types can be emitted by the inner shell ionization of the nanoparticle atom (Belkić 2010, Stolterfoht 1988, Govil 2001, Tandon and Tribed 2000, referred to as the nanoradiator effects (NRE) with particle-induced radiation (PIR). These radiation types primarily include secondary electrons such as Auger and ionized electrons and characteristic x-rays.…”

Section: Introductionmentioning

confidence: 99%

Enhanced proton treatment in mouse tumors through proton irradiated nanoradiator effects on metallic nanoparticles

et al. 2012

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The impact of protons on metallic nanoparticles (MNPs) produces the potent release of MNP-induced secondary electrons and characteristic x-rays. To determine the ability of secondary radiations to enhance proton treatment, the therapeutic irradiation of tumors was investigated in mice receiving 100-300 mg MNPs/kg intravenously prior to single dose, 10-41 Gy, proton irradiation. A proton beam was utilized to irradiate nanoparticles with a single Bragg peak set to occur inside a tumor volume (fully absorbed) or to occur after the beam had traversed the entire body. The dose-dependent increase in complete tumor regression (CTR) was 37-62% in the fully-absorbed irradiation group or 50-100% in the traversing irradiation group, respectively, compared with the proton-alone control mice (p < 0.01). One year survival was 58-100% versus 11-13% proton alone. The dose-dependent increase of intracellular reactive oxygen species level was 12-36% at 10 Gy compared with the proton-alone control cell. Therapeutic effective drug concentration that led to 100% CTR with a proton dose of 31 Gy was measured either 41 µg Au/g tissue or 59 µg Fe/g tissue. MNP-based proton treatment increased not only percent CTR and survival in vivo but also ROS generation in vitro, suggesting tumor dose enhancement from secondary radiation as one potent pathway of therapeutic enhancement.

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“…In order to obtain the interference term we must go beyond the independent-electron approximation for the TS2 process, where the two-electron amplitude is considered a product of two one-electron amplitudes [9,10]. In this approximation the shake-off and the TS2 amplitudes do not interfere, because they are 90 • out of phase.…”

Section: Introductionmentioning

confidence: 99%

Time ordering in atomic collisions

Nagy

McGuire

Végh

et al. 1997

J. Phys. B: At. Mol. Opt. Phys.

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We present a general treatment for the effect of time ordering in the many-electron processes induced by charged-particle impact. We show that time ordering is essential in order to obtain odd power Z terms in the cross section which is necessary to get different values for positively and negatively charged projectiles. A second-order calculation is performed for the double ionization of helium. The electron-electron interaction is taken into account only by the shake-off term. The interference between the shake-off and second-order term is responsible only for a part of the dependence of the cross sections on the sign of the charge of the projectile.

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Electronic processes in energetic ion-atom collisions

Cited by 5 publications

References 55 publications

The spectroscopy of highly ionised atoms

The spectroscopy of highly ionised atoms

Enhanced proton treatment in mouse tumors through proton irradiated nanoradiator effects on metallic nanoparticles

Time ordering in atomic collisions

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