An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 14 Search : Compton
Compton
  کامپتون   
Compton

Fr.: Compton   

The American physicist Arthur Holly Compton (1892-1962), the Nobel Prize in Physics 1927, who made important contributions to the study of X- and cosmic rays.
Compton catastrophe, → Compton effect, → Compton equation, → Compton era, → Compton recoil, → Compton scattering, → Compton shift, → Compton suppression, → Compton wavelength, → Comptonization.

Compton catastrophe
  نگونزار ِ کامپتون   
negunzâr-e Compton

Fr.: catastrophe de Compton   

In a compact, steady radio-source where the density of relativistic electrons and the density of synchrotron radiation due to these electrons are very large, the radio photons should be transformed into X-ray and gamma-ray photons through inelastic Compton scatterings onto the relativistic electrons. Thus the radio photons should rapidly disappear and only gamma-ray photons should be observed. This phenomenon does not take place if the radio source is in relativistic expansion.

Compton; → catastrophe.

Compton effect
  اسکرِ کامپتون   
oskar-e Compton

Fr.: effet Compton   

Increase in the wavelength (reduction in the energy) of an → X-ray or → gamma ray  → photon when it collides a → free → electron.

Compton; → effect.

Compton equation
  هموگشِ کامپتون   
hamugeš-e Compton

Fr.: équation de Compton   

Theoretical equation which gives the change in the photon wavelength due to the → Compton effect.

Compton; → equation.

Compton era
     
dowrân-e Compton

Fr.: ère de Compton   

A period in the early evolution of the Universe, before t = 10-23 sec when the radius of curvature of the Universe was less than the → Compton wavelength of typical particles.

Compton; → era.

Compton recoil
  پسزنیِ کامپتون   
paszani-ye Compton

Fr.: recul de Compton   

The change of direction undergone by the electron in the → Compton effect. The scattered photon and the collided electron move in different directions from that of the incident photon.

Compton; → recoil.

Compton scattering
  پراکنشِ کامپتون   
parâkaneš-e Compton (#)

Fr.: diffusion Compton   

Scattering of a → photon due to the → Compton effect.

Compton; → scattering.

Compton shift
  کیبِ کامپتون   
kib-e Compton

Fr.: décalage de Compton   

Of the → Compton effect, the amount of increase in the wavelength of an energetic photon upon its collision with an electron.

Compton; → shift.

Compton suppression
  نهاوش ِ کامپتون   
nehâveš-e Compton

Fr.: suppression de Compton   

In → gamma ray → spectroscopy, a technique to reduce the contribution of gamma rays generated by → Compton scattering.

Compton; → suppression.

Compton wavelength
  موج-طول ِ کامپتون   
mowjtul-e Compton, tul-e mowj-e ~

Fr.: longueur d'onde de Compton, longueur d'onde Compton   

The quantum wavelength of a particle with a highly relativistic velocity. The Compton wavelength is given by h/mc, where h is Planck's constant, m is the mass of the particle, and c the light speed. For an electron, the Compton wavelength is about 2.4 × 10-10 cm, intermediate between the size of an atomic nucleus and an atom.

Compton; → wavelength.

Comptonization
  کامپتونش   
Kâmptoneš

Fr.: comptonisation   

The change in the → spectrum of → electromagnetic radiation due to → scattering from → electrons. When → photons and electrons coexist in the same volume of space, their → collisions can → transfer energy from photons to electrons (→ Compton effect) or from electrons to photons (→ inverse Compton effect).

Verbal noun of → Comptonize; → -tion.

Comptonize
  کامپتونیدن   
Kâmptonidan

Fr.: comptoniser   

The verb describing the → Camptonization process.

Compton; → -ize.

Comptonized emission
  گسیل ِ کامپتونیده   
gosil-e Kâmptonidé

Fr.: émission comptonisée   

Emission undergone → Comptonization.

Comptonize; → emission.

inverse Compton effect
  ا ُسکر ِ کامپتون ِ وارون   
oskar-e Compton-e vârun

Fr.: effet Compton inverse   

A → scattering process by which fast-moving, energetic particles transfer energy to photons, decreasing the wavelength of the radiation.

inverse; → Compton effect.