Recent content by majid313mirzae

thank you. I will measure the residence time distribution in a straight pipe(2 meter). But I don't know how much of the radiotracer is needed

thank you. please more explain, with details.

I will do an experiment with a radiotracer,99Tc. The detector is NaI 1"*1". But I don't know how much of the radiotracer is nedded?

yes, you are right. But remember that is only true for a sphere of radius R with charge uniformly distributed throughout its volume

yes, it's right

also see John .R lamarsh- introduction to nuclear reactor theory chapter 3

It's correct that Eactivation= V - Q if Eactivation less than binding energy of last neutron in 209Bi then a neutron with zero kinetic energy , fission immediately occur but if Eactivation greater than binding energy of last neutron the difference between them is neutron kinetic energy

yes , you are. Below file can be useful http://dspace.mit.edu/bitstream/handle/1721.1/42045/228875559.pdf?sequence=1

unit of ##Et^2## is ##ML^2T^{-2} * T^2## then ##ML^2## so unit of ##R## is ##\frac{ML^2}{ML{-3}}## = ##L^5##

yes, it's correct. The dimension ##p_0 R^3## is same for E. ##ML^{-1}T^{-2}## * ##L^{3}## = ##ML^2T^{-2}##

Outside the nucleus, free neutrons are unstable and have a mean lifetime of 885.7±0.8 s (about 14 minutes, 46 seconds). why??

i want this book- can anyone help me? Vandenbosch, R. and J. R. Huizenga. Nuclear Fission, Academic, New York, 1973.

All nuclei with A > 210 are alpha emitters, yet very few emit protons spontaneously. Yet both decays lower the Coulomb energy of the nucleus. Why is proton decay not more common?