Nuclear Definition and 997 Threads

I am a teacher and the problem statement is part of our curriculum. I feel like I have a basic understanding of what particle accelerators are, but I only have a vague idea of what the strong nuclear force has to do with this. Here's what I know: In a particle accelerator, you might smash...

Hello! I am sorry if this question is silly, but I really don't know much about nuclear physics so I am actually curious. How much physics insight can the nuclear physics research give us? Most of the particle physics experiments aim to search for BSM physics, but as far as I understand (again...

To write the equation I took as the control volume the following block: and the equation I wrote are: $$ 6m_{f} c_{p_{f}} \frac {dT_{f}}{dt} = 6P - \frac 1 {R_1} (T_f - T_g) \text{ for the fuel}$$ $$ m_{g} c_{p_g} \frac {dT_{g}}{dt} = \frac 1 {R_1} (T_f - T_g) - \frac 1 {R_2} (T_g - T_c)...

There are already 4 generations of nuclear fission reactors. (Compare https://en.wikipedia.org/wiki/Nuclear_reactor#By_generation.) However among these, there does not seem to be a (maximum) safe nuclear fission reactor design, which immediately stops the nuclear chain reaction when the reactor...

One of the main issues to send orbiters to (light years) faraway locations is the propulsion problem. Conventional chemical fuels cannot provide enough energy by weight to produce that much thrust. Nuclear fission provides a lot of energy by weight, but usually radiation energy doe not produce...

Problem Statement: Started with a 0.1g of cesium-137, decayed into ba-137 after twelve hours by beta decay, this starts to decay with gamma rays. 12 hours after this someone pockets the sample and absorbs 50% of the beta particles and 10% of the gamma rays. How would I find the rate at which...

Trying to understand the effects of a deep space nuclear explosion. Starfish prime was detonated at 400km, ie still within Earth's atmosphere, and the explosion effects are well described. https://en.wikipedia.org/wiki/High-altitude_nuclear_explosion A significant outcome is the high MeV...

$$Sr\frac{90}{52}\rightarrow Yt\frac{90}{51}+e\frac{0}{-1}$$ is this correct?

In nuclear magnetic resonance, when should one process spectra in absorption mode and when - in magnitude mode? What is benefit of using the first one and the second one? For example, I need to integrate spectrum. In this case, what should I use - absorption or magnitude mode?

Hi All. For the above energy level diagram, why do the energy levels spacings proceed to get smaller and smaller as the excitation energy increases?

I have tried using the formula $$Δm=[Zmp+(A−Z)mn−M]$$ But either I plug the wrong thing into the wrong part or it just isn't working. Essentially I want to know the method I need to use. I will then try to solve it and hopefully get it correct. Thanks

Hey Guys, exercise: "It is desired to study the first excited state of 16O which is at energy of 6.049 MeV. Using the (alpha, n) reaction on target of 13C, what is the minimum energy of incident alphas which will populate the excited state? So, i suggest to define first the reaction equation...

So, basically I need a roadmap of the math required for nuclear theory. I've completed Calc (1-3) and teaching myself ODE. My roadmap currently is PDE, Complex Analysis, Linear Algebra and Numerical methods. I'm going to work through Arfkens 2nd edition of math methods. Any thing else I should...

Hi all, I struggle to understand how energy is conserved I fission. If the binding energy per nucleon increases, surely the mass defect simply accounts for that difference to conserve energy before and after. How does the mass defect account for the kinetic energy of the fission fragments as well?

I understand that In general, the branching ratio for a particular decay mode is defined as the ratio of the number of atoms decaying by that decay mode to the number decaying in total. But I can’t get this specific branching ratio.

Want a nuclear fusion reactor for your home or office? No problemo... https://physicsworld.com/a/physicists-spot-the-signatures-of-nuclear-fusion-in-a-table-top-device/

My Textbook says this is the formula to find energy values for electron shells: $$E_{mol of electrons} = \frac{-1312kJ}{n^2}$$ where $n$ is in electron shell number But when we divide by 1 mol to get the energy value for each electron we get $$E_{electron} = \frac{-2.178 \cdot 10^{-18}}{n^2}...

I was reading that the reason the nucleus of the atom is so heavy is that there is so much energy being used to keep the nucleons together with the strong nuclear force, and energy=mass. I can understand that. But it is energy which equals mass, not force, right? The strong nuclear force is just...

Hi, absorption cross section in resonance depends on the relative speed of neutron and nucleus in Center of Mass frame. As you can see here https://www.nuclear-power.net/glossary/doppler-broadening/ Temperature plays a big role in determining resonance absorption cross. I don't understand why...

I saw this national geographical documentary at some point, and it said that when India collided with Asia hundreds of millions of years ago, it formed the Himalayas which ended up uncovering huge amounts of limestone. That limestone in turn reacted with CO2 in the atmosphere and caused an ice...

Hello! I am taking a course in nuclear physics using the book An Intro to the Physics of Nuclei & Particles by Dunlap. I am a little confused by an explanation related to the critical radius for nuclear reactions. The author first defines a value ##vq## as the average number of neutrons...

we know nuclear fusion is a powerful,reliable and long lasting energy source,the power of future. 1 kilogram of fuel used in D-T fusion can generate as much as 3.401×10^14 joules of power, enough to power my home for a century. So how feasible is it to construct a small tokamak in my house with...

I have two scenarios. One; imagine that, at the same time as the engine of your ship is ignited, there is also a device detonated inside the ship. If timed correctly, the difference between the two would equal out, right? For now, there's one huge problem and that's making sure the aim is...

Did a quick search of an explosion in a vacuum and got most of what I was looking for, but on CBS Sunday morning they had a segment on restoring and reevaluating all of the immense footage of America's atmospheric nuclear testing program. They showed some amazing footage of the expansion of the...

I'm not sure where this post belongs--here, or nuclear chemistry, quantum mechanics, NMR spectroscopy, etc. Moderator--please feel free to move it to a better location. I'm wondering if a container of liquid hydrogen subjected to a strong magnetic field would have both nuclei of each atom...

Hi, I want to make a simple nuclear reactor core simulation to calculate the thermal power production. Is there any open source code with interface (or not) that you recommend to use? The core have cylindrical shape with Uranium( up to 90% enriched) molybdenum fuel,Beryllium reflector and one...

I have seen numerous sources for radii of atomic nuclii of various elements. One of the most common is the simple equation r=1.2 fm×A⅓, which makes sense if the nuclear density is constant for all elements and all isotopes. However, I've also found a table of measured nuclear charge radii that...

Hi, I am wondering what's the best (or one of the best) available books on Introduction to Nuclear Physics. I started reading Krane's, which is a good book. However I am looking for more options. I am most interested in books which give a deep insight into physics concepts without lacking of...

I am studying how to determine the nuclear charge radius from direct measurement of the Coulomb energy differences of nuclei. My book says that there is strong evidence which suggests that the nuclear force does not distinguish between protons and neutrons. Thus changing a proton into a...

Hello, My name is Muhammad Imron aka imronuke. I am interested in nuclear reactor computation and currently developing open reactor simulator called ADPRES which you can find in the my github repository. Regards,

Google translator does not really help me translating these exercises. May you help me out? If this is not the site I should I ask for translation of physics texts, may you tell me where should I ask for that?

My first question on this forum, and I'm diving in head first. While working on a project that has very little to do with physics, I stumbled upon a list of products that result from a Uranium-235 fission reaction. To my surprise, there is a lot of good stuff in that nuclear waste. Specifically...

Hello: I have small question , as I read about the ATF research in the news ,a question present it self , why no one does any research on heat carrier in nuclear reactor that can absorb nuclear radiation and change it to infra red radiation ? Best H

Hi, I am almost done with my 5 years of a bachelor of nuclear engineering, the main field I am working on is thermal-hydraulic but I am flexible with changing my whole path. for example, I am in between data science and CFD analysis. What kind of jobs do I qualify for?

I know nuclear weapons technology is the most closely guarded secret in the world. But aren't there any leaks at WikiLeaks or elsewhere that can enable a citizen to build an atomic bomb? What is the safety net that could prevent that? It's not that I'm looking for nuclear information, but...

I've attached an image from the book "nuclear physics" by John Lilley. It says "in only one case is the restulting photon energy sufficient to cause re-excitation". My question is what is this one case? I recall my lecturer saying only decay to S01 is sufficient to cause re-excitation, but I...

Hey guys, new here and was hoping for some help. Basically I have to use Fortran 77 to complete some questions for an assignment The first thing to do is, read a bunch of numbers in a list format and then use these numbers to be entered within an equation. The values I have are listed in a 1...

The atomic nuclei consist out electrons, protons and neutrons (with only exception of hydrogen, that does have a neutron). Thus, it would be straightforward, that there existed a corresponding radiation for each nucleus component, when a nucleus decays. There is an electron radiation (beta...

Hello I must do a report on Chernobyl: before, during and after. I have all I need except for a clear and simple explanation of how steam explosions work in this regard. All the online sites I've been on provide information that is too advanced, and as a non native English speaker, the...

I am a masters student in the UK. For my project I have to monitor the efficiency of zinc sulphide detectors for monitoring alpha particles in liquid solutions. I need to model things like the proximity of the detector to the liquid, the size of the detector and the thickness of the light-tight...

When I was an undergrad doing research in a university lab, the director of the lab also consulted at a Nuclear Fusion company. I remember like it was yesterday him making a statement that commercial Nuclear Fusion was going to be a reality within 10 years. That was 1977. What happened? Lack...

Hi, I am just about to finish my bachelor of nuclear engineering, my aim is to work in the industry " energy companies " ,I want to be a CFD engineer, where I can work in both the nuclear field and outside the nuclear field. Is a masters in mechanical engineering a good idea ? if yes, any...

What powers a star?

Hello, I am a BSME senior with NE minor graduating in August 2019 from UTA. I am very interested in fusion power, space travel, and electrical engineering (lol). I almost wish I had picked EE instead of ME. It's more interesting to me. I just joined an EE student and together we are building a...

There are some theories, but I am looking for one that have proven using test data and can be placed in an excel table or a program with coefficients for some common reactions. Do anybody knows a paper with tables or formulas? I found this with a fortran code that is recent...

I do not understand the theory of moment of nuclei I read here: http://www.sjsu.edu/faculty/watkins/nuclearmoment3.htm that the magnetic moment of Hydrogen is 2.79284734 magnetons = 2.79284734*9.274009994e-24 joules/tesla =2.59e-23 joules/tesla So if I make to rotate a proton using 150 keV...

Homework Statement Fission, the process that supplies energy in nuclear power plants, occurs when a heavy nucleus is split into two medium-sized nuclei. One such reaction occurs when a neutron colliding with a 235U (uranium) nucleus splits that nucleus into a 141Ba (barium) nucleus and a 92Kr...

Homework Statement Q- a positron emerges normally from a 4-mm thick slab of plastic (density= 1.14g/cm^3) with an energy of 1.62 MeV. What is the energy of the particle when it entered the slab? Homework Equations Range when 0< T <= 2.5 MeV: R= .412+T^[1.27-.0954*ln(T)] where T is kinetic...

Hello, I need the stopping power for a proton ion gun through Boron-11 sheet 1mm thick. I have the following table obtained from here: https://www-nds.iaea.org/stopping/stopping_hydr.html Where the unit is in 1-15*eV*cm2/atom: Then I calculated for 600keV protons at table 5.1eV*cm2/atom. I...

Russia has developed a micronized nuclear powered drive for ballistic misiles and cruize misiles. This is obviously a very aggressive and environment polluting action. However, could such nuclear powered drive be used for space ships, that would start in space and do not touch the atmosphere of...