Nuclear physics is the study of the composition, behavior and interaction of atomic nuclei and their constituent parts.
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What is the relationship between earthquakes power and nuclear explosions?
What is the relationship between earthquakes power and nuclear explosions?
How to compared power of earthquake with nuclear explosion?
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How do people get the proton number for each element from experiment?
How did people determine the proton number for each element from experiment in each decade of 20th century?
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Why are there photographs of nuclear tests?
I was looking at old photographs of the nuclear tests on the bikini atoll. It dawned on me that you don't want to run film through airport x-rays, as it exposes the film. I've been told that a ...
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309 views
Why do we use only nonrelativistic equations in nuclear physics?
What is limit between relativistic and non-relativistic equations? Which conditions do we have to use one of these?
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217 views
Ratio of radiation sources in the uranium cycle
Sorry, I know y'all are probably getting a lot of questions re: Fukushima, but I had a very specific one and no-one has been able to answer it.
I am specialised in medical radiation, and have been ...
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How is energy produced in Alpha emission (radioactivity)?
In the above Alpha decay reaction, we get thorium by the alpha decay of uranium with an alpha particle. But we also get energy of amount Q by this process. And according to my course books, this Q ...
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Is there an equation for the residual strong nuclear force?
First of all, note the qualifier "residual". The present question is not the same as that asked, and answered, in the StackExchange question "Is there an equation for the strong nuclear force?" which ...
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Simple PDE vs String Theory
For the sake of simplicity, I’d like to believe that there is one master non-linear partial differential equation
governing physics. In particular, consider a Klein-Gordon form:
$$
\frac{\partial^2 ...
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Pressures Necessary for Carbon Detonation
Carbon detonation is a characteristic event of Type 1a Supernova (EDIT: where an accreting white dwarf near the Chandrashankar limit of 1.4 solar masses explodes), an extremely important standard ...
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180 views
Phase space suppression
In talking about production/decay processes, I've heard people speaking of decay modes or cross sections being 'phase space' suppressed. For example, a two body final state is more likely to occur ...
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83 views
Proton-Neutron Lattice as a form of matter?
Would it be possible for a lattice of protons and neutrons (I'm picturing a plane of hexagons in my head) to exist bound by the strong nuclear force (not gravity)? I know that the strong force losses ...
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219 views
The vacuum as trigger
Do the apperance in the atomic nucleus of virtual matter-antimatter particle pairs play a role in the random nature of radioactive decay?
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PNMR, Pulsed Nuclear Magnetic Resonance, Experiment
I am writing a lab report for class on PNMR experiment that we did. How come in this experiment we don't worry about the electron spins in our sample? Aren't the electrons affected by the PNMR machine ...
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Containement system of a nuclear reactor: role of the water moderator
In a modern nuclear reactor for example a PWR there are multiple containment systems which prevent the release of radioactive material into the environment and shield the environment from the ...
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Coulomb barrier and proton evaporation
Why is it that neutrons evaporate from nuclei more easily than protons do?
Intuitively, since protons are electrostatically repelled (in addition to whatever nuclear forces they have in common with ...
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109 views
Gamma Ray LASER Theory and Technology
I am aware that a similar question has been asked by someone else in the past, but in a very general form. Due to the physics interest and technology, in this question I put emphasis on the detail of ...
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340 views
gamma ray lasers?
Is it really possible in the foreseeable future to create a gamma ray laser? I've read these two articles on Wikipedia:
the Hafnium controversy
Induced gamma emission
It sounds pretty amazing, ...
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356 views
What are nuclear isomers? What is isomeric energy?
Can someone explain nuclear isomers to me, and in particular what the energy involved is? I understand generally that we're talking about moving from a less to more stable configuration of nuclear ...
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$\frac{1}{\sqrt{2}}$|Independent particle Model $\rangle$ + |Strong Interaction Model$\rangle$?
What is an adequate way to understand this simultaneously. One has the underlying assumption that matter is saturated and has the merit of being able to come up with an accurate formula for the ...
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691 views
Why must the deuteron wavefunction be antisymmetric?
Wikipedia article on deuterium says this:
The deuteron wavefunction must be
antisymmetric if the isospin
representation is used (since a proton
and a neutron are not identical
particles, ...
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What is the difference between the KDEMO and DEMO projects?
I'm writing a paper on the future of fusion technology and I can't seem to find the difference between Europe's DEMO experiment and Korea's KDEMO except for the fact that they are both planned to ...
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What fraction of nuclear excited states are known?
I was reading a paper today claiming observation of a new $2^+$ state in $^{12}\mbox{C}$, which would correspond to a sort of rotationally excited Hoyle state. Looking at NuDat reveals that this ...
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284 views
Why is the binding energy per nucleon not zero for hydrogen atom?
The lone proton has not to be worked on against any electrostatic force. So where does the energy come from? What is mass defect for a hydrogen nucleus?
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Nuclear/quantum physics simulation software
Is there any software which is able to simulate D-T interaction for example and get temperature-crosssection curve without referencing to any experimental data?
Do we have quantum-level simulation ...
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Energy Levels of 3D Isotropic Harmonic Oscillator (Nuclear Shell Model)
One simple way of detailing the very basic structure of the nuclear shell model involves placing the nucleons in a 3D isotropic oscillator. It's easy to show that the energy eigenvalues are $E = ...
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Strong force, where is the seperation?
In class I got given a diagram like this: (albeit without the Electrostatic force line)
However the teacher told us the nucleons are typically separated when the force is zero. So as the string ...
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Electrical neutrality of atoms
How is it that atoms with equal numbers of protons and electrons are described as "electrically neutral" when the proton is 1,800 times more massive than the electron?
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How many years will the nuclear resources of Earth last for generating electricity?
We have plenty of nuclear reactors around the world. They are consuming nuclear resources of the Earth. Nuclear elements are scarcer than the other elements, aren't they? When are we going to run out ...
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Nuclear physics problem, Why do we use high weight atomic elements?
So as far as I know, nuclear fission uses high weight atomic elements to manufacture power. If the risk of runaway reactions are a major reason for not expanding this technology, why don't we use ...
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Nuclear reactor control rods
What is the relation between control rods surface exposed into a nuclear reactor and neutron energy? Is it linear? I mean, how do neutron absorbing rate change with the progressive immersion of ...
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What happens if we put together a proton and an antineutron?
A hydrogen nucleus consists of a single proton.
A 2-hydrogen (deuterium) nucleus consists of a proton and a neutron.
A tritium nucleus consists of a proton and two neutrons.
This makes me wonder how ...
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Where do electrons get their ever-lasting circulating energy?
We all know (or maybe know) that to move, we need to spend energy. If you want to drive a car, you gotta spend gasoline.
We also know that energy can't be created (first law of thermodynamics, and ...
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Nuclear physics Radioactivity
90Sr has a half life of 28.5y. It is chemically similar to Ca and enters the body through the food chain and collects in bones. It is a serious health hazard. How long in (years) will it take for ...
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47 views
How does a noseblow counter detect alpha radiation?
After working in air fed suits,operatives are required to give samples from their nasal passages by blowing their nose into a tissue,which is then counted in a noseblow counter. How does this work?
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How much radiation exposure in the US was caused by the 105 nuke tests in the Pacific?
Between 1947 and 1962 the US conducted 105 tests of nuclear weapons in the "Pacific Proving Grounds". I'm wondering how much radiation exposure resulted on the west coast of the US. These were part of ...
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417 views
How much energy can be extracted from hydrogen?
http://en.wikipedia.org/wiki/B-L says that the difference between baryon number and lepton number is conserved. Ordinary hydrogen has one of each, but turning it into helium releases only the binding ...
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Cherenkov radiation in nuclear bomb
Would Cherenkov radiation occur at the explosion of a nuclear bomb? Suppose it would not be occluded by smoke or anything else for that matter.
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Obtaining isotope stability
For a given isotope, one can obtain the binding energy using the semi-empirical mass formula.
For example, has a binding energy of 1782.8 MeV. From this information, how can the likelihood of the ...
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how to measure activation energy of fission?
i heard that fission activation energy of (235)U is less than of neutron separation energy of (236)U so this must the reason that (235)U is fission able
$$E_s+(236)U\to (235)U+n$$
in this interaction ...
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Adding many more neutrons to a nucleus decreases stability?
If you take any large nucleus and add protons to it, the electrostatic repulsion between them will make the nucleus more unstable, because the electrostatic force between them is more repulsive at a ...
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Water-cooled fast neutron reactors
Can anyone explain why fast neutron reactor designs use sodium/lead/salt cooling, instead of water (heavy/light)?
Is that because neutron absorption by water would not allow to break even in fuel ...
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XP Decay mode of radioactive nucleus
The decay mode of Carbon-8 is listed as 'XP' in this table. None of the references I looked at listed XP as a decay mode. What is it>
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Boiling water reactor
What are the typical power densities in conventional boiling water nuclear reactor per cubic centimeter of fission material?
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How was Be-8's Half-Life of 7E-17 Second Determined?
Radionuclides occur with half-lives in a vast range of over 37 magnitudes as listed in this site. In question 7584, Lubos Motl explained how Gyr half-lives were determined. This method doesn't appear ...
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155 views
Can stable nuclei theoretically fission through quantum tunneling?
As I understand it, an unstable nucleus is going to randomly fission because the forces binding it together are momentarily weaker than the electrostatic repulsion of the protons.
Given that some ...
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Why is the total interaction cross section larger for incident particles with lower energy?
The cross section of a nuclear interaction is a measurement of the probability of that interaction occuring. These probabilities are typically presented in terms of barns ($10^{-28}$ m$^2$) as a ...
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Why did Otto Hahn use neutrons to generate transuranium?
In physics textbooks with chapters about nuclear fission there is often a historical introduction about Otto Hahn. That he tried to generate transuranium but discovered the nuclear fission.
If you ...
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Is man-made Carbon Fusion possible?
In a type Ia Supernova, the carbon accumulated in the earlier stages of a stars death fissues to create even heavier elements. Could this be used by humans aswell? Is it theoretically possible to ...
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“Dynamic Albedo of Neutrons” and all these Farnsworth fusors
I've checked specs of Russian "Dynamic Albedo of Neutrons" module on Mars MSL rover - it can do 10^8 neutron pulses at 10 pulses per second. It works on D-T reaction in tiny linear accelerator, and ...
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283 views
Why the pion does not get mass under Spontaneus breaking of chiral symmetry, but the quarks do?
Some sources state that when the mass of a quark goes to zero, it allows for Spontaneous Breaking of Chiral Symmetry and gets a constituent mass of about $200\, \mathrm{MeV}$.
Other sources state ...
