Nucleus Definition and 409 Threads

Is there a theoretical basis for the spin of the nucleus of an arbitrary atom? I'm looking at this website: http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/nspin.html

I know that the positron and electron have the same mass, which allows them to annihilate, and I know how solve the 2 body Schrodinger for a standard hydrogen atom to get the orbitals. My question is why the math works out the way it does. Is there an "intuitive" (I use that word cautiously)...

Homework Statement Hi guys, any help here would be greatly appreciated. I'm told that a carbon-12 atom fuses with a hydrogen nucleus with the atomic mass of 1 to form a nucleus of nitrogen releasing 1.95 MeV as a result. I'm asked to write an equation of the reaction and work out the...

I don't know much thing about rays. When I was studying Rutherford experiment, I saw that nucleus scattered the alpha rays with Coulomb forces, and naturally the opposite forces effect the nucleus. So do the nucles of atom moves to the direction of alpha rays' first direction?

Homework Statement Why are protons in the nucleus and electrons aren't?? The Attempt at a Solution So this is the question I was asked. I understand that protons are held together by nuclear (or strong) force. I understand that an atom is stable because there's an equilibrium...

Homework Statement What is the magnitude of the electric force a hydrogen nucleus exerts on its only orbiting electron in the Bohr model? The Attempt at a Solution Fe = kQq/r^2 Since there is one proton and one electron. Q and q are equal to each other: 1.6 x 10^-19. k = 9 x...

An alpha particle is thrown toward a gold nucleus. An alpha particle has two neutrons and two protons and a load module 2e, where "e" is the electron charge, while the gold nucleus has 79 protons and a load module 79e. What is the minimum kinetic energy that the alpha particle must have in order...

dear sir, i heard that that proton spins about itselfand this helps in stability of nucleus. i also heard from the a friend that neutron has a proton and electron within it. this electron moves out from neuton making it proton and entering proton to form a neutron. sir i need to know...

dear sir, I am curious to know the way protons and neutron are arranged in the nucleus and movement of protons and neutrons in the nucleus.please guide me.

Homework Statement Predict the ground state spin and parity for ^{7}_{3}Li, ^{15}_{7}N. ^{31}_{15}P. Homework Equations Fill up shells for neutrons and protons separately. Shells in increasing energy are: 1S_{1/2}, 1P_{3/2}, 1P_{1/2}, 1S_{1/2}, 1D_{5/2}, 1D_{3/2} and have...

does nucleus in an atom spin?

How is electromagnetism different from gravity in that accelerated objects radiate EM waves when accelerated in an electric field but no gravitational waves are generated when objects are accelerated in a gravity field? Why do not planets orbiting the sun generate gravitational waves and...

magnitude of the "current" flowing around the nucleus in the Bohr mode Homework Statement According to the Bohr model, a hydrogen atom in its lowest energy state has a nucleus consisting of a single proton, which is orbited by a single electron. The speed of the electron is 2.19×106 m/s and...

Homework Statement Derive equation below. It is the potential energy of an electron inside a nucleus assumed to be a uniformly charged sphere of R. Homework Equations V'(r) =( -Ze2/4∏ε0R)(3/2 - (1/2)(r/R)^2) The Attempt at a Solution So I understand that I need to find the ∫ from infinity...

sir i want to know why is number of neutron is more or equal number of proton in nucleus of atoms whose atomic number is more tnan one?

Is the most stable/likely configuration of protons in heavy nuclei that of being evenly distributed throughout the nucleus? As opposed to something like a spherical distribution?

Just a quick question - how come that for electrons we need probability orbitals, but for the nucleus we don't? Is it because of the difference in mass? Or because of a bigger matter wavelength? Can we really pinpoint the location of the nucleus or ist it just easier for textbooks to depict it...

People normally talk of electrons performing oscillatory motion when an electromagnetic field is incident on an atom. But, won't the electric field of the E.M. wave cause the nucleus of the atom to vibrate...? . "Note: Here I am talking of isolated atoms, that is atoms of noble gases, and not...

The wave function of an electron in ground state hydrogen atom is non-zero at points far away from the nucleus. Interpreted as the probability of finding the electron, this is telling us that there is a finite probability of finding an electron far away from the nucleus even if it is at ground...

Hello, I have this exercise and want to check if what i did is correct Homework Statement Nuclei, typically of size $10^{-14}$ m, frequently emit electrons with energies of 1-10 MeV. Use the uncertainty principle to show that electrons of energy 1 MeV could not be contained in the nucleus...

If the electrons closer to the nucleus experience greater electrostatic attraction from the nucleus, would not the closer electrons require more energy to stay in orbit? Also, the electron shielding from the inner electrons would reduce the energy required to stay farther away from the nucleus...

Hi, The decay constant for alpha decay is the product of the transmission probability P and the collision frequency f of the alpha with the potential barrier, where f depends on velocity of the alpha in the nucleus. My question is about this Hyperphysics page, where alpha decay is modeled...

Why is the probability of finding an electron of s orbital in the nucleus highest? Is Quantum Tunneling involved? If so, won't the electron need a large amount of energy to pass through the nucleus?

Why does alpha decay emit a helium nucleus.Why not a proton or gamma rays. Please help me understand the science behind why it emits this?

why nuclear radiations occur in atoms with large nucleus?Is it the weakening of residual strong force? If so why it gets weak ?

Hello everybody, I am a first year student and I have a question that I am not sure if I can answer. A radioactive isotope of Tin(50), with 85 neutrons in its nucleus and without any electrons bound to it, undergoes a beta minus decay. The electron pops into existence, 10-15m from the center of...

i will experiment about condensation nucleus. ( make cloud artificial. is my topic ) in my experiment i need high efficiency of condensation nucleus high efficiency mean which one can drop temperature faster and lower please know me some

Hello everybody! :wink: I have some difficulties concerning the concept of nuclear binding energy. First, look at this example: http://www.freeimagehosting.net/newuploads/jtefo.png In the first case, the two protons have big energy. But this energy is not changing it's weight. And in the...

what will happen TO THE ATOM if electron end up inside the nucleus ( as in quantum tunnelling) ?

How is this possible if quarks are point particles?

So I recently heard of a simple way of thinking about how the emission of an alpha particle is "beneficial" to a nucleus being stable. The argument goes as follows: "Let's say we have a nucleus that is unstable because the electric repulsion of protons can't balance out the strong force...

Why nλ= 2∏r? this is the explanation from website , Now, one complete orbit has the same length as the circumference of the circle that the orbit traces out, so is given by 2πr. This distance must be equal to an integral number of wavelengths. (If it were not, the wave traced out by the...

Homework Statement a) Calculate the average binding energy per nucleon in the deuterium nucleus. b) The energy that binds an orbiting electron to the hydrogen nucleus is 13.4eV. Calculate the ratio of the binding energy per nucleon to the binding energy per electron in deuterium. Which...

Homework Statement The ground state of the hydrogen atom has the wavefunction: \psi (r) = \frac{1}{\sqrt{\pi}} (\frac{1}{a_{0}})^{\frac{3}{2}} e^{-r/a_{0}}, where a_{0} = 0.53Å a) Calculate the probability that an electron will be found inside the nucleus of the hydrogen atom, which is...

Homework Statement a) Consider a hydrogenic atom consisting of a carbon-12 nucleus and a single electron. What is the wavelength of the photon emitted when this atom drops from n = 5 to the n = 2 state? b) According to the Bohr theory, what is the distance between the electron and the...

I'm learning about NMR and it's been stated that deuteron has a spin 1 nucleus and so should exhibit different behavior. Why? I've heard of electrons having spin, and now protons, but I don't see why the spin of a neutron should matter since it's uncharged. I'm thinking a spin of 1 means...

How do I find the radius of the nucleus if given the mass? I am asked to compare it with the value found using the formula R= 1.2 A^(1/3)

I've been noticing that for expressions finding the nuclear radius there is a constant term r_0, that I can't seem to find an explanation for. The full term is R=r_{0}A^{1/3} That the atomic radius is roughly the 3rd root of the number of nucleons. But where is the r_0 coming from? I'm using...

How is it that the calculated Fermi energy of neutrons and protons in a heavy nucleus are different, but it's observed that they have the same energy? And how much is the Coulumb repulsion of the protons play a factor in that?

Homework Statement A helium nucleus has radius rHe = 1.9 fm, mass m = 6.6 × 10-27 kg, and charge +2e. A gold nucleus has charge +87e and radius rAu = 7.0 fm. What initial speed must a helium nucleus have if it is to come into contact with a fixed gold nucleus in a head on collision...

Homework Statement What is the probability that an electron in the ground state of hydrogen will be found inside the nucleus? a) First calculate the exact answer, assuming the wave function \psi(r,\theta,\phi) = \frac{1}{\sqrt{\pi a^3}} e^{-r/a} is correct all the way down to r=0. Let b be the...

Homework Statement A particular nucleus of the element Plutonium contains 94 protons and 150 neutrons. What is the magnitude of the force from the nucleus on a single electron that is a distance of 0.563x10-12 m from the Plutonium nucleus? So basically this was a homework question that I...

How come I never see any equivelant of the particle in the box or harmonic oscillator counterparts for modeling of the atomic nucleus? I'm still a bit new to QM, but the only thing I ever see are QM descriptions of electrons, electron orbitals, electron spins, electron quantum entanglement...

So, I was in botany class the other day and we were going over the model of a flower describing the parts. The ovum, the egg and polar bodies and someone said another name for the polar bodies and my teacher said she would accept the answer if we knew what a meta nucleus is. Naturally no one...

protons and neutrons interact with each other with the strong force, which is very strong however, there are many unstable nucleus which have a lifetime in the order of millions of years this is quite strange the time scale of strong interaction is many many orders smaller than that of...

can anyone give an example in which a nucleus absorbs a neutron and becomes a stable nucleus? or the combination must break into parts?

Homework Statement The nuclei ^{41}_{21}Sc and ^{41}_{20}Ca are said to be a pair of mirror nuclei. If the binding energy of ^{41}_{21}Sc and ^{41}_{20}Ca is 343.143 MeV and 350.420 MeV, respectively, estimate the radii of the two nuclei with the aid of the Semi-Empirical Mass Formula...

Homework Statement An electron is confined to a nucleus of radius 4 femtometres. Estimate its minimum energy. Homework Equations ΔxΔp_x=h/4\pi E^2=p^2c^2 + m^2c^4 As the electron's rest energy will be much less than it's kinetic energy, E=pc The Attempt at a Solution So I...

Hi guys, essentially I have been talking with my Physics teacher about Beta Decay and she was saying that sometimes electrons come from the nucleus because of the quarks in the protons and the neutrons? I didn't fully understand it so I have likely got it wrong what she was trying to explain. Do...

1.Uranium-235,after taking a neutron turns into Xe and Sr and 2 neutrons or it turns into Ba and Kr and 3 neutrons or many other things. How it is decided that Ur nucleus will change into what? 2.Why aren't we still using fusion to produce energy? 3. Isomers-what's the reason behind the...