Nuclear Definition and 997 Threads

In the solutions (page 6, points ii) and iii)), https://ocw.mit.edu/courses/physics/8-04-quantum-physics-i-spring-2013/assignments/MIT8_04S13_ps1_sol.pdf, it is mentioned that given that the Planck mass is about 20 orders of magnitude larger than a proton and that the Planck length is about 20...

Einstein condensate state or ultra hot fully ionized, removed of all-electron, plasma that is compressed like possibly something like fusion, state (an extraordinarily unattainable state currently; like compressed air into a liquid, but a solid; while even metallic hydrogen is, as far as I know...

Hi everyone, I am trying to figure out the following question: What is the typical mass of the plasma (in typical working configuration) in current nuclear fusion reactor designs? https://en.wikipedia.org/wiki/ITER: "...plasma volume of 840 cubic meters..." So all I need is the plasma density...

I'm working on programming a particle simulation that visually shows the nuclear fusion reaction rate of deuterium at different densities and temperatures, but I'm having trouble understanding exactly how nuclear fusion cross section diagrams are supposed to be interpreted. (The simulation...

A lot of articles I already read says the Strong and Weak Nuclear interactions have a very short range, the first one being ##10^{-15}m## and the second ##10^{-18}m##. My first question is how is this calculated? This leads me to 2 possibilities:$ 1. Both forces actually act with an infinite...

Here is a topic that I see hasn't come up at all , at least as far as I can tell. To be short, most (all?) modern weapons with Pu or Pu primaries (in case of thermonuclear) that are in existence use the implosion technique of the primary Pu sphere, apart from the art of making this implosion...

I'm trying to make up an example for my students to illustrate that in nuclear decay, mass-energy and momentum are both conserved. I found this problem: https://physics.stackexchange.com/questions/304277/calculate-velocity-of-radon-220-nuclear-after-decay I am trying to modify it so that they...

I work in research paper on medical isotope production. I need a software where i can measure the cross section and Irradiation Yield like TALYS and EMPIRE. If you ask me why i don't use TALYS then the reply is I can't install it on my PC. so i am looking for alternate software where i can do...

as far as i understand nuclear fission is the splitting of a heavy nucleus cause of a added neutron the energy you get is cause of the lost mass from binding energy. but i also read that the nuclear fission products undergo beta decay which emits beta particles gamma rays and antineutrinos so...

So, a website in which I just enter an element or an Isotope and it just lists all the relevant experimental data like mass, mass-defect binding energy etc. Also resources for the absorption data, resources to explore Monte-Carlo simulations, and other calculation tools would be awesome. Just a...

Hello all, I've got a question on nuclear decay "reversal" in beta emitters. I've been researching the Cowan-Reines experiment, which used neutrinos to convert protons into neutrons. Recently, I found out that the particle which hits the proton need not necessarily be a neutrino in order to...

I apologize in advance if this is in the wrong forum, I have no idea where this question would really sit. A number of proposed theoretical weapons, and a concept often used in science fiction, describe a satellite launched, or rather dropped, rod that would gain large amounts of kinetic energy...

Hello! Can someone point me towards some papers/readings providing formulas (derived theoretically or based on experimental data) for the nuclear charge radius? Almost all the papers where I found a formula for that are of the form ##aA^b+c##, where a, b and c are constants and A is the mass...

Hi all, For my studies I chose a course on scaling up and down of industrial processes (mostly focussed on the chemical industry), but for our project we (a group of students who knew almost nothing about nuclear reactors) chose to look if the approach (dimensional analysis) can be applied to...

Hello! I am a bit confused by the quantum numbers used to describe the rotation of a nucleus. In Wong's book these are J, M and K, which represent the rotational quantum number, its projection along the lab z-axis and its projection along the body intrinsic symmetry axis, respectively. However...

I've calculated that reaction-energy in fission of a single atom of Uranium-235 is 2.5977713481*10^-11 Joules (based off of the equation given above.) I'm assuming that PWh has to be converted into simpler units so, 2.49PWh = 2.49*10^15Wh.. afterwards I could make it into watts but I was never...

I might be interested in researching nuclear fusion reactors after college. What majors or double majors would be best suited for this career path? Physics, nuclear engineering, materials science, electrical engineering, mechanical engineering, etc?

I was thinking that these reactions have something to do with the conservation of leptons but I am not certain.

I'm aware that geometric buckling is equal to material buckling when k =1, any pointers on how to set up the boundary conditions for this problem?

Why does U-238 tamper increase nuclear yield of nuclear bomb? I mean it is not fissile.

Hello! I am confused about when the nuclear force is attractive and when not. Based on deuteron (the book I am following is Wong), we see that we can't have bound state with isospin T=1 (otherwise we would see, for example, a stable double neutron and no proton nucleus). Also, in the book I see...

I have been amateur reading about beta decay. The example given for electron capture was krypton-81 into bromine-81. Going from a noble gas to a halogen gives rise to a big change in chemical potential energy. How is this energy accounted for in the equations of the reactant particles and...

after using the conservation of energy and momentum for a nuclear interaction i arrived to the following equation for the q factor as the book did , but can't get my head around deriving the second equation from the Q equation ? i will appreciate any help . thanks

Summary:: In need of help determining the exhaust velocity of a rocket nozzle given temperature and propellant molar mass Greetings and salutations! My name is Robert DeVries, world builder extraordinaire. I have come with questions in search of answers. So for the last few days I've been...

How did you find PF?: Via Google Hello, I am a new member here. Thano you for having me ! Im going through a dilemma. Next year I will have to choose a subject for higher studies. I want to work in space organisations in future and I like space researches. So basically Aeronautical Engineer...

"Glow in the dark paint was applied to the lock, so a soldier could unlock the miniature bomb in the dark". I'm thinking that its unlikely 'glow in the dark paint' would be tritium based. More likely radium, which was used up to WWII for instrument dials etc. But I don't know. Backpack nukes...

Option A is wrong because the reaction is still possible but just can not happen spontaneously? Option B is correct Option C is wrong because it should be binding energy per nucleon Option D is wrong because it should be nuclear reaction instead of chemical reaction? Thanks

I got 6.5 MeV but I don't understand how to determine whether the energy is released or absorbed. My guess: the energy is absorbed because mass defect of neon is bigger? Thanks

If I understand this question correctly, I am supposed to prove an integrate from negative infinity to infinity ∫x|∅(x)|2(1+|x|)ndx is finite. Sorry, but I have no idea.

Can fusion reaction propagate inside a (very thick walled) cappilary if fusion has been initiated at one end? In this situation it seems like all the energy would have nowhere to go but into heating and pressurizing the fuel, providing conditions for further reaction. I imagine this is a...

Summary: Have any physicists or anyone period tried to get rid of nuclear waste . Summary: Have any physicists or anyone period tried to get rid of nuclear waste . There must be some way to keep it from emitting strontium-90 and the rest. At the quantum level isn't there something that can...

If this could actually be achieved, it would probably win him another Nobel prize, and solve the dilemma of nuclear waste for good. https://bigthink.com/technology-innovation/laser-nuclear-waste?fbclid=IwAR1mFH03XE1x744PHRXCKfWmBt2qeRquOYMAgIXUjqSVEK1kqK2hSkUktcg

In 2009, the same society together with the Tau Zero Foundation announced Project Icarus, a similar spacecraft that could achieve 15% the speed of light. That year, a physicist called Friedwardt Winterberg announced a fusion spacecraft that could be used as a capacitor to produce proton...

Hello and thanks in advance for your help. For about a week now, I've been trying to write what should be a simple python program. The idea is first to write a program for a simple harmonic pendulum, then adapt it to a spring pendulum. However, in order to do this, I have to write the simple...

HI EVERYONE. I'm a beginner in system codes for nuclear thermal-hydraulics simulation and i hope to exchange informations about simulations with system codes , like RELAP/SCADAP I thank the creators of this forum, as well as the members who are there for the scientific exchange and the help of...

Hello all: I have a small question about nuclear propulsion , why everyone are trying to use it ,and why this wired choice of nuclear option , retrofitting a nuclear reactor to mount it on the rocket , isn't that a little dangerous , why they don't use other option or research it , there is few...

Details of this calculation from the photo?

I'm asking for suggestions in various categories as some of them might be more important for coursework whereas others might be more recreational and to expand knowledge. I know for example that Knoll is the go to for radiation detection and Lamarsh and Baratta is the most important for intro...

Summary: Suggestion on experimental research related to reactor for master's degree dissertation. Summary: Suggestion on experimental research related to reactor for master's degree dissertation. I have just started my master's degree course in Nuclear Power Engineering and decided to...

Is it that work is done to overcome the nuclear forces holding the nucleus together?

Hi I need help. I have my masters in Nuclear physics from Ahmadu Bello University Zaria Nigeria but am passionate about studying for medical physics in my PhD specializing in either Nuclear medicine or radiotherapy. Please any University that will admit on fully funded scholarship am open to...

Is there any phenomenon in nature that resembles or is analogous to nuclear fission?

The best-known classes of nuclear transmutations are fission and fusion: Nuclear Fusion Under normal condition, nuclei do not stick together; because they repel each other at large distances (due to the electrostatic repulsion 'barrier') and thus the strong nuclear force cannot act. But if these...

The binding energy of a nucleus is the energy of the strong force, minus the disruptive energy due to the Coulomb force. Thus, to illustrate the curve of binding energy per nucleon, we can combine both of the diagrams above: https://www.physicsforums.com/attachments/3-jpg.248607/...

The strong nuclear force is the strongest of the four basic forces in nature (the others are: the electromagnetic force, gravity, and the weak nuclear force). But it also has the shortest range, meaning that nucleons (protons & neutrons) must be extremely close (~1 fm) before its effects are...

In process of releasing heat of nuclear reaction and burning oil, the internal energy of the material(that be burned) be contant if we prevent heat transfer to environment.The temperature of the material increase.How is entropy of the material varied(if we keep volume be constant)?If the entropy...

Here is a 3D model I made of a nuclear reactor and reactor core.

Radioactive decay modes always release energy; but why can't nuclear fusion of light elements be a mode of radioactive decay? I guess because although such processes are exothermic, we need an inaccessible fairly high amount of energy to overcome the electrostatic repulsion barrier. But now...

Brad Pitt, Steve Jobs' widow, and Britain's best-known fund manager reportedly invested in a fringe nuclear energy startup inexplicably valued at close to $1 billion. The Financial Times reported that the unlikely trio apparently saw potential in Industrial Heat, a North Carolina-based company...

Please explain the difference between mass deficit and nuclear binding energy and is there a relationship? Thanks Geo