Fission Definition and 311 Threads

Homework Statement I have been working some questions on decay but when i considered these 2 examples, there seems to be a problem Homework EquationsThe Attempt at a Solution Answer to first one is B while that of the second one is C. When I considered them separately, the answers seem ok...

A person said: "However uranium-235 (U235) makes up only 0.72% of normal uranium metal and has to be separated from the remainder (mostlyuranium-238) in special factories which makes uranium-235 (U-235) a little more expensive. An uranium-235 (U-235) atomic has three neutrons less than an...

so I am taking a quantum mechanics course, we started taking about dispersion. so he the lecturer gave us an example about the fission of uranium by alpha ray... he said that we should place a detector in order to detect the alpha particlee , but the detector can only detect particlees with...

Homework Statement [/B] Suppose the main water pipe breaks in a nuclear power plant, shutting off the water flow. If the control rods fall immediately into place, stopping the chain reaction, is there still a problem? Yes, because radioactivity continues to create lots of thermal energy. (A)...

Hi there, Sorry if thisis a stupid question its just been bugging me for a while and I am not a scientist as such so need help with the answer... nuclear fission is where two atoms collide and release energy yes? nuclear fusion is where two atoms combine to release energy and a new isotope...

Homework Statement There is this university exam question: Draw the nuclear binding energy curve and and show that energy is released when a heavy nucleus of A> 200 breaks up into two nearly equal fragments. Homework Equations See below. The Attempt at a Solution I found in an example in...

I am currently in my first year of undergrad taking general science course classes with an undeclared Major. My dream is to work with Nuclear Fusion reactors, and i am at a bit of a loss at choosing Majors. Should I make my concentration "Applied physics specializing in Nuclear Engineering(or...

How is Lead being used in a nuclear power plant, is it done by the fission process or fussion? No equations are needed as this is an introductionary question into the atomic structures. Are the stable atoms unable to undergo fission/fussion? Please explain to me, how do I know if fission...

Hey everyone I'm new here and this is my first thread, although i have great interest in chemistry and physics my knowledge of these fields is very basic( I'm graduated in economics) so don't be surprised if i ask something that may look silly. so here are my firsts questions. -Is it...

Homework Statement I have been able to complete all questions apart from part e) Homework Equations Beta minus decay involves electron emission Beta plus decay involves positron emission Electron capture takes in an electronThe Attempt at a Solution I believe that because there is an...

So far I've only found some leads into the use of magnetohydrodynamics theory in designing liquid metal cooled reactors. Anyone know of any other topics?

i want this book- can anyone help me? Vandenbosch, R. and J. R. Huizenga. Nuclear Fission, Academic, New York, 1973.

Homework Statement Estimate the neutron energy needed to produce fission of 208Pb. Is it likely that such neutrons woould be released in the resulting fission? Homework Equations Eexcitation=Qexcitation+Tn Qexcitation=[m(208Pb)+mn-m(209Pb)]c2 V=(e2/4πεo)(Z1Z2/r)...

http://upload.wikimedia.org/wikipedia/commons/2/23/Nuclear_Fission_Experimental_Apparatus_1938_-_Deutsches_Museum_-_Munich.jpg Hello everyone. According to Wikipedia, this is a photograph of the experimental apparatus with which Otto Hahn and Fritz Strassmann discovered nuclear fission in...

Hello. My teacher and I have had this very intense debate for quite some time now and we need your opinion on this issue. This question is, where does the energy released in a nuclear fission reaction come from? (Please use the terms "nuclear binding energy" and "mass defect") My take on this...

I am currently studying A level Physics. I understand that, in a nuclear fusion reaction, the mass of the nucleus we end up with is smaller than that of its constituent nuclei, so Δm is negative and so energy is lost in huge amounts. But what about a nuclear fission reaction? The mass of the...

I was talking to a person that studies photo fission and i asked if I could shoot a couple of lower energy photons to cause fission. But he said it wouldn't work I would need 1 high energy one. I am not completely sure why this wouldn't work. Does the photon have to get absorbed at one point...

The binding energy (BE) per nucleon for 235U is 7.6 Mev. The 235U undergoes a nuclear fission to produce two fragments both having a BE of 8.5Mev. What is the energy released from a complete fission of 1kg of 235U (joules)? Here I assumed that it breaks into two 118X element. Therefore...

Hi everyone, I'm an engineer and not a physicist, so forgive me if something sounds stupid. Question: Is it possible to know, which way products of nuclear fission (u-235) will go? Imagine a sheet of single (or few) atom layer crystal of U-235, that is irradiated by neutron source from...

Hi everyone, I am currently applying to graduate schools in nuclear engineering. I am applying to some top 10 schools and also some lower ranked ones as safeties. However, my fear is that if I am not accepted to a top ten school I will have to attend the safety schools. I am not particularly...

I am confused about spontaneous fission. My basic understanding is that like α-decay the tunnel effect is responsible. We have a potential barrier caused by the superposition of surface tension energy and coulomb potential through which an energised nuclear fragment can tunnel with a certain...

From the standpoint of temperature (not pressure), would components that could experience fission experience a higher fission rate toward the center of the Earth because of the higher temperature, or at ordinary room temperature conditions?

Physicists in all nations realized immediately after the experiments of Meitner and Hahn in 1938 that building a fission bomb might be possible. Was this possibility publicly known or discussed, at least in the US which entered the war only at the end of 1941? After all, people were much more...

I know the iron-56 nucleus is not a good fission candidate, and that more energy is required to split iron-56 than what is required to split it. But theoretically, if one were to split iron-56, what would be the products and what would be the energy obtained per unit mass? Would there be...

Hi everyone, First, I would like to thank all of you for helping me with my research paper. The paper was a big success! As I mentioned in previous posts, I'm about to start my college education as a nuclear engineer. I am debating between nuclear fission and nuclear fusion. I understand the...

Homework Statement Estimate the energy released, in Joules, by the fission of 1g of U-235 according to the equation: ^{235}_{92}{U} + ^{1}_{0}{n} → ^{144}_{56}{Ba} + ^{90}_{36}{Kr} + 2^{1}_{0}{n} + Q atomic masses: ^{235}_{92}{U} = 235.04438u ^{144}_{56}{Ba} = 143.92279u...

When a nuclear reactor is in a critical state, the neutrons released in each fission trigger an average of exactly one additional fission. If the average number of additional fissions triggered rises above one, the reactor enters a supercritical state in which the fission rate and the thermal...

Problem: The fission of ^{235}_{92}U releases approximately 200 MeV. What percentages of the orginal mass of ^{235}_{92}U + n disappears? Solution: Using E=mc^2 we can estimate the amount of mass m converted into energy E. Solving for m we get, m=E/c^2=[(2 x 10^8 eV)(1.60 x 10^-19...

Homework Statement Homework Equations The Attempt at a Solution (a) Shown. (b) W = 975 MeV (c) Initially nucleus has volume V. Splits into two smaller particles each with charge Q/2, and volume V/2. So for each particle, Q/2 and R*(1/2)1/3 So, W' ~ 2 *...

Homework Statement See the image below: Homework Equations In the previous part, it was proved that a particle moves through a distance x in a material without interacting with probability P given by P=\exp(-\sigma n x) Here σ represents the cross section of the reaction between...

Hi all, according to following data pertain to energy release from fission: Instantaneous Energy from Fission Kinetic Energy of Fission Products 167 Mev Energy of Fission Neutrons 5 MeV Instantaneous Gamma-ray Energy 5 MeV Capture Gamma-ray...

In a nuclear fission of the uranium for example, the uranium atom can be subdivided in Kr and Ba + 2 neutrons + energy dissipated. This energy comes from the mass defect of the uranium in relation to Kr+Ba+2 neutrons. Is this energy full released in the form of photons? Is this energy full used...

Hello, I wanted to know if it was possible to create a machine that can convert elements to those of your choosing? The most likely canadidate(and only canidate) is transmutation by fusion or fission. I know this is a physics forum but this stuff is covered in physics and you guys are pretty...

During nuclear fission a heavy nucleus of low binding energy splits into two middle mass nuclei with high binding energy ! From where does this energy suddenly come from ?? And why is the binding energy of heavy nuclei lesser than that of middle mass nuclei ??

just curious, is Americium 241 a fissionable isotope. if it is, is it possible for it to undergo a controlled chain reaction from bombardment of neutrons.

So CFY gives the average number of atoms of a specific nuclide produced from a fission directly plus that from the decay of precursors, so why does thermal U233 have two values for Gallium @ 7.192x10^(-8) and 1.0788x10^(-8)? Is this number dependent on the thermal range the neutrons that hit the...

For our last physics and chemistry project at Tully High, we broke the record for the Largest Nuclear Fission Model with mousetraps and ping pong balls! The record can be viewed via the following link

So I think, as a rule of thumb that for fission to be possible \frac{Z^2}{A}\geq47 I want to be able to derive this relationship though.. If a nucleus deforms into an ellipsoid, its surface area can be described by 4\piR2(1+\frac{2}{5}\epsilon^2 + ...) call this X And its Coulomb...

Hi, this is my second year studying physics and few weeks ago we went into nuclear physics very briefly because we are learning it next year. I'm not sure if the energy required to fission is equal to the energy required to fusion. For example is energy required to fission hydrogen atom...

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...

What's stopping entrepreneurs from using fission - taking mercury, for example, or any heavier element for gold/silver - and creating gold and silver from it? Do you think there will come a day when this is commercially viable? Any guesses when?

Does it give a lot or is nuclear fission only powerful when you have a large quantity?

Homework Statement not an equation as such. new to this but i wanted to know what the conditions for nuclear fission are? other than high temperatue and pressure Homework Equations "state the conditions for fusion and hence explain why it has proved difficult to maintain a sustainable...

Is it possible to quantum link daughter particles from a fission event. That is to say, at certain atomic transmutations are the daughter particles sufficiently deterministic that they can be quantum entangled from a measurement perspective. I am aware that I 1) do not know when the fission...

Hi, My textbook says that only Uranium and Plutonium are fissionable but it doesn't say why. Do smaller isotopes become bigger when they are bombarded by neutrons instead of spitting apart? Thanks

and successfully fission. let's say a neutron approaches the spherical nucleus from a particular distance. its possible route to the nucleus has a conical shape. how far from the center can it strike and still fission? If it just nicks it just inside a tangent line will it fission?

just thinking cross sections here. a neutron that is freed as a result of a fission of pure U235. travels @c/10(fast!) will its trajectory be perturbed by the gravitational force emitted by a nearby nucleus, or do things on the quantum level work differently?

1. How much energy is released during the fission of one uranium-235 nucleus? 2. e=mc2 lol :smile: 3. I thought of putting them together but then how to separate them? 1.67495×10-27+3.903 05×10–25×c2=1.7539207313048996244767495×10-7 By the way, the answer is 4.73×10-11

I could use a basic explanation of how half-lives are associated with the fission barrier. Are half-lives still present in induced fission and not just spontaneous fission? Thanks

Hi, what are the immediate fission products of U233 ? Is the first fission reaction of U233 same as U235 producing Ba and Kr but just different isotopes than U235 ? I would appreciate any help. Thanks