Gamma (uppercase Γ, lowercase γ; Greek: γάμμα gámma) is the third letter of the Greek alphabet. In the system of Greek numerals it has a value of 3. In Ancient Greek, the letter gamma represented a voiced velar stop /ɡ/. In Modern Greek, this letter represents either a voiced velar fricative or a voiced palatal fricative.
In the International Phonetic Alphabet and other modern Latin-alphabet based phonetic notations, it represents the voiced velar fricative.
Hi, can someone tell me the extinction coefficient of a gamma ray in the atmosphere? How far does a gamma beam go in the atmosphere before its intensity reduces to half or to 1/e?
This Paper may be large, but it is a must for some pretty far reaching consequences for Cosmology.
http://uk.arxiv.org/PS_cache/astro-ph/pdf/0312/0312347.pdf
I will astounded if the paper is not seen in the near future as a remarkable paper of astronomical foresight and will be a paper...
Does anybody know if it's possible to evaluate the gamma function analytically? I know it becomes a factorial for integers, and there's a trick involving a switch to polar coordinates for half values, but what about any other number? I have tried using a Taylor expansion and residue...
It's embarassing to have to ask this, but I have never seen this issue discussed. Is there an upper limit on the energy of the gamma rays from the gamma ray bursts? Namely 1.022 MeV? Because any gamma ray of that energy or greater can and will produce pairs of electrons and positrons by...
some news about the origin of gamma ray bursts, this may be
old news to some.there have been many theories for the production
of gamma rays, it seems now that the search is narrowing.
http://www1.msfc.nasa.gov/NEWSROOM/news/releases/2003/03-041.html
Using NASA's Chandra X-ray...
Hello, can anyone please me here?
I need to prove that
int(x^a(lnx)^b.dx= (-1)^b/((1+a)^b+1)*Gamma(b+1)
by making the substitution x=e^-y
this is what I have done so far:
x=e^-y -> y=-lnx
x=0 -> y=-(-00) =+00
x=1 -> y=0
dy/dx = -1/x -> dx=-xdy =-e^-ydy
then the integral...
This may be a dumb question:
What is it about radioactivity that caused them to name it "radioactive"?
All I was taught was that radioactivity is an emission of gamma particles, beta particles, or alpha particles. I don't remember anything about radio wavelength photons.