photons were observed in coincidence with the He+ ejectiles. by radiative capture of a quasi-free target electron. This excitation energy is between 6 and 10 MeV for about 80% of the stable nuclei. into an empty K-shell, and the energy excess is released as a single photon. is well interpreted by the present calculations. What is the abbreviation for Radiative Electron Capture? RECC abbreviation stands for Radiative Electron Capture to Continuum. Andrey Surzhykov* and Ulrich D. Jentschura The interplay of the important regions of momentum space results in REC dominating nonradiative capture at high energies (Eichler 1990). The compound nucleus then decays to its ground state by gamma emission . The results are compared with theoretical predictions. Part of Springer Nature. The recombination photon is emitted under a polar angle . In this review, we are mainly interested in the heaviest ions like Au 79 +, Pb 82 + and U 92 +, which can be produced at the GSI Darmstadt with … Radiative and non-radiative electron capture from carbon atoms by relativistic helium ions. The radiative electron capture of a target electron into the projectile continuum has been studied for the collision system U 88+ + N 2 → U 88+ +[N + 2] ∗ + e − + γ at 90 MeV/u. The photon spectra calculated for a range of temperatures of the electron spectra as well as several column densities of the plasma clouds are discussed. Not logged in The end-point energy of the photon spectrum was determined to be 388 +/- 8 keV, in good agreement with accepted mass differences. Electron capture is a comparatively minor decay mode caused by the weak force. 1. Transition amplitude Target ionization into low-lying energy states with respect to the projectile frame of reference is described by means of electron capture to thecontinuum, i.e. These keywords were added by machine and not by the authors. The phenomenon of radiative electron capture (REC) has been studied for 17-40-MeV O ions channeled through thin single crystals of Ag and Si. To do this we adapted a formalism in which the REC is viewed as collision stimulated transitions between electron states dressed by the radiation field. We show that the ion-velocity dependence of the cross sections discovered recently by Appleton et al. The excitation energy is close to the binding energy, i.e. in a loosely bound initial state) [1]. Radiative electron capture (REC) by swift heavy ions in encounters with target atoms has been studied for a variety of collision systems. The radiation is associated with the Radiative Electron Capture, REC, by He++ ions and should be observable with space born detectors. Radiative double electron capture (RDEC), occurring when two electrons are captured to a projectile ion with the simultaneous emission of a single photon, has been investigated. Formulae have been obtained for the degree of linear polarization of recombination radiation from a homogeneous plasma having an anisotropic electron velocity distribution, f(v vector), characterized by an axis of symmetry. The photon spectra calculated for a range of temperatures of the electron spectra as well as several column densities of the plasma clouds are discussed. This result should be compared with the value 9.2 × 10-5 predicted by the theory of Martin and Glauber. Radiative electron capture to continuum in relativistic ion–atom collisions 3 2.1. Y1 - 1972. in relation to radiative electron capture (REC, where the electron is quasifree, i.e. The REC process can be considered as the time-reversed photoelectric effect on the partly ionized projectile atom. This process is experimental and the keywords may be updated as the learning algorithm improves. The radiation is associated with the Radiative Electron Capture, REC, by He++ ions and should be observable with space born detectors. Not affiliated : National Bureau of Standards, Washington, D.C. OSTI Identifier: 4355322 NSA Number: NSA-11-001380 Resource Type: Journal … Comme c’est le cas pour l’ensemble des processus de désintégration bêta, il peut arriver que la capture électronique soit accompagnée de l’émission d’un photon gamma en plus du neutrino. A second type of interrelation concerns di erent possible processes under the Radiative and non-radiative electron capture from carbon atoms by relativistic helium ions. The electron's capture trigger the emission of an invisible neutrino by the nucleus. The continuous spectrum of photons accompanying the electron-capture transition from 7 Be to the first excited state in 7 Li has been measured in coincidence with the nuclear γ rays from the deexcitation of this state. Luis Alvarez, prix Nobel de physique, eut une longue et brillante carrière de physicien. Radiative electron capture (REC) involves the process of charge exchange in conjunction with the emission of a high-energy photon. A study of the REC process into bare high-Z can therefore be utilized for the investigation of the photoelectric effect. This service is more advanced with JavaScript available, Relativistic Heavy-Particle Collision Theory Radiative ionization: The link between radiative electron capture and bremsstrahlung D. H. Jakubassa-Amundsen Mathematics Institute, University of Munich, Theresienstrasse 39, 80333 Munich, Germany Abstract This chapter is devoted to the theory of radiative ionization of target atoms in energetic collisions with highly stripped projectiles. TY - JOUR. We use cookies to help provide and enhance our service and tailor content and ads. The probability of 1s+2s radiative capture giving a photon energy greater than 50 keV per nuclear γ ray was determined to be (10.3 +/- 0.6) × 10 -5 . Andrey Surzhykov* and Ulrich D. Jentschura This process, in which an electron is transferred from the target to the projectile with the simultaneous emission of a photon, plays an important role in spectroscopic studies of high-Z few-electron atoms.
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