Fr.: scintillation interstellaire
An apparent twinkling of the signals from distant point-like radio sources (pulsars). It is due to turbulence, i.e. fluctuations in the electron density of the interstellar ionized gas, through which the signals have passed on their way to Earth.
1) Rapid variation in the brightness, wavelength, and mean position of stars
caused by turbulence in the Earth's atmosphere.
From L. scintillationem (nominative scintillatio), from scintillatus p.p. of scintillare "to send out sparks, to flash," from scintilla "particle of fire, spark."
Susu, from su "light," related to suz "burning," present stem of suxtan; Mid.Pers. sôxtan, sôzidan "to burn," Av. base saoc- "to burn, inflame" sūcā- "brilliance," upa.suxta- "inflamed;" cf. Skt. śoc- "to light, glow, burn," śocati "burns," śoka- "light, flame;" PIE base *(s)keuk- "to shine."
Fr.: compteur à scintillation
A device for detecting and measuring ionizing radiation by means of flashes produced when the radiation particles strike a sensitive layer of phosphor.