All Questions
61
questions
4
votes
1
answer
88
views
How does inner Bremsstrahlung work?
I'm trying to understand inner Bremsstrahlung. I know this applies to beta minus decay, but have a hard time understanding how it works. In the beta decay, electron is emitted from nucleus. I believe ...
- 200
0
votes
1
answer
139
views
Depth ionization $\neq$ depth dose for electron beam?
Consider an electron beam which is targeted towards some object with a certain depth. The concept of dose refers to the amount of energy expended by the electrons in collisions with atoms of the ...
- 273
10
votes
2
answers
2k
views
Where do beta particles go after being emitted from the nucleus?
What high-school taught me:
In beta radiation, beta particles are lone electrons that are emitted from the nucleus at high speeds after a neutron decays into a proton and an electron.
Beta radiation ...
user350881
2
votes
1
answer
103
views
The impact of electron density on photoelectric effect
I'm a second year radtion therapy student and i'm looking at the attentuation of KV energy beams. I'm wondering why for the photoelectric effect to occur does there need to be a high amount of 'inner'/...
- 21
0
votes
2
answers
189
views
How do radiation particles escape the atom unaffected in radiation?
Alpha radiation is the emission of two protons and two neutrons from the nucleus of an atom (helium nucleus). Beta radiation is the emission of a high-speed electron from the nucleus of an atom as a ...
user350881
1
vote
2
answers
53
views
How do physicists know that some of a beta ray/particle's 'missing' energy isn't lost to interference with the electron cloud surrounding the atom?
Enrico Fermi and Wolfgang Pauli ultimately concluded that beta decay resulted in an electron and an electron antineutrino leaving a nucleus... BUT...
How does the electron leaving a neutron punch its ...
- 4,509
1
vote
1
answer
160
views
What range of light on the electromagnetic spectrum are produced by the de-excitation of electrons?
When an electron moves from an excited state to its ground state, a photon is emitted, which is the source of light. However, I know that the highest energy form of light, gamma rays, are produced ...
- 11
1
vote
3
answers
186
views
Electrons in Atom in different energy states
I have a very basic doubt in Bohr's Atomic Model.
I just studied that an electron can go to any Energy State with in the atom, by getting relevant energy from photons.
If an electron goes to 2nd ...
-1
votes
2
answers
141
views
Can we define x-rays as as decelerated electrons?
HI I'm a student and i was reading up about x-ray production. I realized that after the electrons hit the metal plate( usually tungsten) x-radiation is produced. Is it that the metal ironizes and the ...
- 21
-2
votes
4
answers
389
views
How much x-rays and heat is released by a high speed electron when collided with a surface?
We know that when an electron hit a target (surface) at very high velocity (or with high acceleration),it produces x-rays and heat.
So my question is how strong the x-rays and heat will be,if velocity ...
0
votes
1
answer
51
views
Can we uniquely determine the particles emitted in a neutron induced binary fission of a radioactive element?
Can we uniquely determine the particles emitted in a neutron induced binary fission of a radioactive element?
For example, if we have $
\newcommand{\U}{\mathrm U}
\newcommand{\Mo}{\mathrm{Mo}}
\...
- 362
0
votes
2
answers
297
views
Forming of helium in radioactive decay
I have just came across a question, where 1mole of Uranium (238 92) gets converted to Pb(206 82) now after balancing we get that during this decay in presence of air, 8 alpha particles and 6 beta ...
1
vote
0
answers
142
views
What is the difference between areal density and attenuation coefficient?
Speaking of beta electrons, their attenuation is usually described by the areal density $\sigma$, i.e. "how much" g/cm^2 of a certain material they can pass through before stopping. I've ...
- 353
0
votes
0
answers
24
views
Radiation attenuation parameters for beta and gamma rays
I know that to describe the attenuation radiation undergoes while passing through a material, we use the areal density (which is basically the penetration depth * density of the material) for beta ...
- 353
0
votes
0
answers
70
views
Can you ionise air via thermionic emission of electrons?
Assuming air is made up only of 78% $N_2$ and 22% $O_2$, what percentage of the $N_2$ and $O_2$ would gain a negative charge if held in a container with a high density of free electrons?
- 56