Web18 sept. 2003 · Cross sections are reported for emission of Lyman‐α radiation in collisions of H + and H with CO and CO 2 in the 1–25‐keV energy range and with CH 4 and NH 3 in the range 5–25 keV. In the experiments with CH 4 and NH 3 the Doppler‐shifted Lyman α, emitted by H(2p) formed in electron capture by fast incident protons or collisional … WebTranslations in context of "raie de Lyman alpha" in French-English from Reverso Context: Les astronomes utilisent fréquemment les caractéristiques bien spécifiques de « l'empreinte digitale » de la lumière émise par l'hydrogène - connue sous le nom de raie de Lyman alpha - pour mesurer la quantité d'étoiles formées dans l'Univers lointain.
Faint Lyman Alpha Emission at z~3 - Institute of Astronomy, …
WebWe investigate the dependence of QSO Lyman-alpha absorption features on the temperature of the absorbing gas and on the amplitude of the underlying dark matter fluctuations. We use high-resolution hydrodynamic simulations in cold dark matter dominated cosmological models. In models with a hotter intergalactic medium (IGM), the … Web1S-2P transition with Lyman-α (Ly-α) radiation at 121.6 nm [4,21,22–25]. The challenge is that Ly-α lasers are notoriously difficult to build and produce relatively low power. The only ... width of the Ly-α radiation should lie below the 1S-2P natural linewidth of 100 MHz in order to approach the Doppler cool-ing limit (2.4 mK). An ... fleet farm website green bay wi
Lyman Alpha Radiation - an overview ScienceDirect Topics
The Lyman-alpha line, typically denoted by Ly-α, is a spectral line of hydrogen (or, more generally, of any one-electron atom) in the Lyman series. It is emitted when the atomic electron transitions from an n = 2 orbital to the ground state (n = 1), where n is the principal quantum number. In hydrogen, its … Vedeți mai multe Because of the spin–orbit interaction, the Lyman-alpha line splits into a fine-structure doublet with the wavelengths of 1215.668 and 1215.674 angstroms. These components are called Ly-α3/2 and Ly-α1/2, … Vedeți mai multe Since the hydrogen Lyman-alpha radiation is strongly absorbed by the air, its observation in laboratory requires use of vacuumed … Vedeți mai multe • Lyman-alpha forest • Lyman-alpha emitter • Lyman-alpha blob • Lyman-break galaxy Vedeți mai multe Web19 sept. 2016 · We develop a set of analytical approximations for the estimation of the combined effect of various photoionization processes involved in the resonant four-wave mixing generation of ns pulsed Lyman-α (L-α) radiation by using 212.556 nm and 820-845 nm laser radiation pulses in Kr-Ar mixture: (i) multi-photon ionization, (ii) step-wise (2+1) … WebVol. 112, 1974) The Solar Lyman-c~Radiation in Ionospheric Absorption at 2775 kHz 663 The comparison of the A3 ionospheric absorption data (2775 kHz) with satellite data on … chef ben robinson father