gamma
伽马,伽玛,伽马值,伽马射线
Definitions
- 1
- : the third letter of the Greek alphabet.
- : the consonant sound represented by this letter.
- : the third in a series of items.
- : Astronomy. a star that is usually the third brightest of a constellation: The third brightest star in the Southern Cross is Gamma Crucis.
- : a unit of weight equal to one microgram.
- : Physics. a unit of magnetic field strength, equal to 10−5 gauss.
- : Photography. a measure of the degree of development of a negative or print.
- : Television. an analogous numerical indication of the degree of contrast between light and dark in the reproduction of an image in television.
- : Chiefly British. a grade showing that an individual student is in the third, or lowest, of three scholastic sections in a class.Compare alpha, beta.
Examples
The highest-energy gamma ray carried about 957 trillion electron volts.
The quake led the magnetar to release a blob of plasma that sped away at nearly the speed of light, emitting gamma rays and X-rays as it went.
Prescription Aklief cream, the first new retinoid product in more than 20 years, selectively targets RAR gamma, the most common retinoic acid receptor on the skin.
When we injected the combination of TNF and interferon gamma, mice are dead like flies.
In fact, the change can happen when gamma rays strike many different kinds of photons.
Well, maybe it was a gamma-ray burst, or maybe it was something else, cautioned some others.
The name is descriptive: they are extremely intense bursts of gamma rays, the highest energy form of light.
Only gamma rays can do it, since all other forms of light are too low-energy.
When the gamma rays enter the sleeve, they interact with that photon gas, annihilating into electron-positron pairs.
He created his own agency, Gamma, in 1966, though he later left to join Magnum.
They combine the square and the cross, while the head and bill of the bird form the gamma indicative of the Swastika.
I've got a little rocking-chair down in gamma's room—used to be cousin Efan's.
Little children say pease for please, gamma or granma for grandma, dess for dress, tocking for stocking.
It certainly can't be anything less than gamma rays and probably even of greater frequency.
Radioactive atoms almost always decay by emitting negatively charged beta particles usually accompanied by gamma rays.