Nuclear physics is the study of the composition, behavior and interaction of atomic nuclei and their constituent parts.

learn more… | top users | synonyms (2)

1
vote
1answer
146 views

Form factor for Proton

To find the charge distribution of proton , we study electron proton scattering and compute the form factor to find the cross section. The form factor comes out to be Fourier transform of charge ...
1
vote
1answer
103 views

Lead - Lithium = Gold?

In reference to this question about transmuting lead into gold, I'm looking for a correct, though magical, way to turn lead into gold. I'm not worried if it's possible to split off a lithium nucleus ...
1
vote
1answer
74 views

Why should odd-ordered electric multipole moments vanish?

In the multipole expansion of the radiation field of a nuclear, it is considered that the odd-ordered poles (like electric octupole) must vanish in order to conserve parity. But there exist many ...
1
vote
1answer
162 views

The central density of a nucleus remains roughly constant?

Let A be the atomic number The density of a nucleus is computed using the ratio of the number of protons and neutrons, A, to the volume of the nucleus (which at my current level, is assumed to be a ...
1
vote
1answer
79 views

Proton-Uranium collision

I am looking for references or numbers regarding what happens when one bombards Uranium with Protons. In particular: How to calculate how often does a collision occurs? Can a collision lead to a ...
1
vote
2answers
290 views

Sommerfeld Parameter Confusion

In almost every reference site I can find, the Sommerfeld parameter $\eta$ is explicitly stated as $$\eta=\frac{Z_1Z_2e^2}{\hbar \nu}=\frac{Z_1Z_2e^2}{\hbar }\sqrt{\frac{\mu}{2E}}$$ Where $Z_1$ and $...
1
vote
1answer
68 views

Are nuclear processes the only processes that release more energy than is input?

Are the nuclear processes of fission and fusion the only known processes or events that release more energy than is input to create those processes? I know I am being a little vague; I do not know the ...
1
vote
2answers
579 views

Why are atoms of the same element exactly the same?

Based on what we know about atomic structure all atoms have an electron density function which describes the uncertainty in the position of an electron. Thus theoretically 2 atoms of the same element ...
1
vote
1answer
58 views

Why is 0 $\nu \beta\beta$ decay often written with electron emission and not positron?

According to http://www.cobra-experiment.org/double_beta_decay/ I can see that double $\beta$+ decay is possible, but I often find neutrinoless double beta sources with the double $\beta$- decay ...
1
vote
2answers
57 views

Explosive energy in a container [closed]

What happens when the explosive energy of a grenade or a bomb is contained in a container, if you will, and no energy can be released through the container in the form of heat or sound etc...? Just ...
1
vote
1answer
62 views

Protons (as opposed to neutrons) to mediate nuclear fission?

I am just wondering why are protons (as opposed to neutrons) not used to mediate nuclear fission? Is it because it is charged, so we will have to input more unnecessary energy to overcome the Coulomb ...
1
vote
1answer
38 views

Internuclear Binding Force: Experimental geometric detail

I am looking for the most precise currently available deuterium potential energy curve (generated purely by experimental data) on the nucleon-nucleon scale. This is crucial. I need a radial cross-...
1
vote
1answer
111 views

Use of fission products for electricity generation

Why can't we use fissions products for electricity production ? As far has I know fissions products from current nuclear power plants create enough 'waste' heat to boil water; and temperature ...
1
vote
1answer
213 views

Ground State Assignment for nuclear shell model

Why is the ground state assignment $0^{+}$ whenever the number of neutrons and protons are both even?
1
vote
1answer
892 views

Centrality and collision parameter b

Can someone tell me what does it 20-30% collision centrality mean in terms of impact parameter b?
1
vote
1answer
586 views

What is Rabi nutation in NMR?

What is the mathematical and physical significance of Rabi Nutation in terms of NMR?
1
vote
1answer
685 views

What is “Symmetric Fission”?

Dose anyone has a clue what Symmetric Fission is? I couldn't find any explanation on what is it on internet.
1
vote
2answers
2k views

Nuclear reactions and energy conservation

How are nuclear fission and fusion compatible with the law of conservation of energy? During fission $He$ splits into 2 hydrogen atoms along with enormous amount of heat energy and hydrogen also ...
1
vote
1answer
519 views

How to superimpose Wood-Saxon and Coulomb potential?

I have just written a simple simulation that models the tunnel-effect of alpha-particles for $^{212}$Po and $^{238}$Ur. In this simulation, I approximate the potential of the nucleus by a simple ...
1
vote
2answers
2k views

What does the Atomic Form Factor means?

I was reading about Nuclear Physics and the autor mentioned something about the Atomic form factor, something relationated with the Fourier Transform of the espacial distribution of the electric ...
1
vote
1answer
132 views

Nuclear transition notation

I have a question which asks me to determine what x is for the following nuclear transition $$^{29}Si(\alpha, n)X$$ But I don't have any idea what this notation implies. Another example: $$^{111}...
1
vote
1answer
138 views

Stability of nucleii and $A=5$

Why there is no stable nuclei with $$A=5$$ in nuclide the chart and so in nature like we know it?
1
vote
2answers
866 views

Muon production in particle accelerator

PAMELA is a particle accelerator which have two concentric rings, protons are accelerated in the inside ring. At ISIS muons are produced when a 800 MeV proton beam collides with a graphite target(...
1
vote
1answer
285 views

About Efimov States and Halo-Nuclei

I read that Halo nuclei could be seen as special Efimov states, depending on the subtle definitions. (The last sentence in the second to last paragraph of this Wikipedia article.) This does ...
1
vote
1answer
190 views

How does the curiosity rover get it's power? [duplicate]

Possible Duplicate: Mars Curiosity Power System I found a web page that said it uses Plutonium. I am sure it's not based on fusion or fission. What is the basic idea on which the power plant ...
1
vote
1answer
41 views

Can We “Tune” The Radiation Output Of a Nuclear Device.?

After reading "Project Orion", the 1950's plan to launch a large mass spaceship using small nuclear devices, (and also from common sense), I realise that a lot of nuclear research is classified. The ...
1
vote
1answer
122 views

Physics needed for a quite well understanding of nuclear bomb [closed]

I am an undergraduate student in physics and mathematics and one of my early dreams in physics was to understand the way nuclear weapons work. Is there a book which deals with the physics and the ...
1
vote
2answers
52 views

Arrangement of Nucleons due to Strong Force

I was reading up on the fundamental forces of nature and I was wondering about the arrangements of nucleons due to the strong force. Considering electromagnetic repulsion, having 2 protons "bonding" ...
1
vote
1answer
47 views

Why do we use Bequerel to measure Radioactivity in food? [closed]

Wouldn't it be better to use the equivalent dose?
1
vote
1answer
53 views

Neutron population growth in a reactor

In nuclear reactors physics, the effective constant $k_{eff}$ is defined as $$k_\text{eff} \equiv {\text{number of neutrons in one generation}\over \text{number of neutrons in the preceding ...
1
vote
2answers
30 views

Why are Nuclei stable and what do neutrons change there?

I am currently thinking about nuclear fission and realized that I forgot some basic facts I've learned (and understood... at least I thought so) some years ago in school. I know that electrons are ...
1
vote
1answer
42 views

Does Rydberg's formula work for different orbitals?

Rydberg's formula is given as $\frac { 1 }{ \lambda } =R\left( \frac { 1 }{ { { n }_{ 1 }^{ 2 } } } -\frac { 1 }{ { { n }_{ 2 }^{ 2 } } } \right) $ where ${ n }_{ 2 }$ and ${ n }_{ 1 }$ are the ...
1
vote
1answer
25 views

Collectivity in nuclei

Why do inelastic scattering of nuclei as well as their electric multipole radiative transition (via say Coulomb excitation) show similar collective enhancement, even though electromagnetic field ...
1
vote
1answer
36 views

What is the relation between Nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR)? [duplicate]

It seems to me that the basic principles are exactly the same, right? Then I am puzzled that the former was awarded a nobel prize while the later not. I noticed a similar question here What's the ...
1
vote
1answer
109 views

Can energy be weighed?

The binding energy of nucleus is calculated as- Mass defect = (Total mass of nucleons-Mass of the nucleus) And after that $E=mc^2$ is used for calculating the binding energy. Hot water is heavier ...
1
vote
1answer
191 views

Does the rest mass energy include the potential energy of the particle?

The potential energy (as far as I have studied - that is, mainly classical physics) depends on the reference level, since its absolute value cannot be calculated. It can therefore be negative as well. ...
1
vote
1answer
36 views

How the number of binary collisions increases with centrality faster than the number of participant in heavy ion collisions?

How the number of binary collisions increases with centrality faster than the number of participant in heavy ion collisions at different particle colliders?
1
vote
2answers
138 views

Why isn't spent nuclear fuel used as a heat source? [closed]

We all know spent fuel rods taken out from a reactor core keeps generating tremendous amount of heat and needs to be kept cool by running cool water. It is also known that if cooling system fails ...
1
vote
1answer
42 views

Will ionization energy be affected by screening effect?

It would be logical to think that the more electrons are ejected from an atom, the harder it is to eject more. I just learned about photoelectric effect experiment. The book is kinda telling me the ...
1
vote
1answer
148 views

Does the mass of a nucleus increase when it is excited to higher energy levels

If we consider an atomic nucleus that is excited to a higher energy level. This maybe due to absorption of gamma for example or as a result of some other decay or interaction. Would the mass of that ...
1
vote
1answer
175 views

Total energy of neutrons and protons

In a stable nucleus, are the total energies of neutrons and protons same?
1
vote
2answers
298 views

Spin, isospin, parity etc. in nuclear physics

I have one question regarding these quantum numbers. When I read through my textbook, it sometimes just says something like: "And this atoms ground state has $J^{\pi} = 0^+$ and isospin $+1$" - as an ...
1
vote
1answer
79 views

Origin of internuclear forces

I just recently read about the existence of internuclear forces as the reason for the nucleus to remain 'stable' as in it doesn't separate out into protons and neutrons even though there is electronic ...
1
vote
1answer
76 views

What are “correlations”?

When working with realistic two-body hamiltonians, a direct diagonalization is almost always imposible. Thus one usually takes a procedure which yields an approximate solution. A well known approach ...
1
vote
2answers
62 views

Resultant half life of sample which contain more than one type of radioctive element.

If a sample is mixed with more than one radioactive elements - for example Ra-226, Po - 210 and Cs -137, then how to estimate the resultant half life of the sample? Is there any general formula to ...
1
vote
1answer
59 views

Protons and Neutrons Overshoot Actual Mass? [duplicate]

When I add up the mass of 6 protons and 6 neutrons in amu, I get a mass that is greater than the mass of carbon. I thought that it should be the other way around, because I have not including binding ...
1
vote
2answers
207 views

Can we predict the half-lives of radioactive isotopes from theory?

Is there any way to predict the half-lives of radioactive isotopes from theory (that is, using only theoretical considerations, without using data about the decay)? For example, could we predict that ...
1
vote
1answer
147 views

What is the difference between zero background radiation and field background radiation in Nuclear Physics measurements?

Can someone please explain the difference between these two terms (Zero Background Radiation and Field Background Radiation) used in radiometric prospecting measurements?
1
vote
1answer
196 views

Deuteron wave function

The deuteron wave function is given by $$|\psi _d\rangle = a|^3S_1\rangle+b|^3D_1\rangle$$ where all states are normalized. How do we find $b^2$ s.t. the wave function reproduces the magnetic moment ...