Fission Definition and 311 Threads

Homework Statement Find the energy which comes out with fission of the nucleus of deuterium and tritium, so we receive like product the nucleus of helium. mass of tritiumm(\stackrel{3}{1}H)=3,016049u mass of the nucleus of deuterium m(\stackrel{2}{1}H)=2,013553u mass of the nucleus of...

Could someone please explain why relatively light nuclei do not undergo spontaneous fission? Thanks.

Homework Statement a - How many fission reactions would occur in 1 year of running of a nuclear reactor if the average power of the reactor is 778 MW? b - How many kilograms of U-235 would be needed to run the reactor for 1 year? c - What is the total change in mass for 1 year of running...

Homework Statement A typical fission reaction is U(92,235) → Zr(40,98) + Te(52,135) + 2 n The numbers in parentheses are (Z,A) for each isotope; n stands for a neutron. The atomic masses of the isotopes are: U(92,235) = 235.043923 u; Zr(40,98) = 97.912746 u; Te(52,135) = 134.916450 u; n =...

What nuclear fission reactor design has the least environmental impact? Including the building, operating, safety, and amount of pollution produced? I'd imagine IFR/breeder reactors as they burn actinides.

hi guys, iam kinda stuck on 2 problems. here is what it is : The nuclear fission reaction of uranium-235 with one neutron produces germanium-81, 5 neutrons and another element, what element is that? what's the atomic number andatmoic mass,?give the equation. 2. how much energy is...

does the fusion reaction in sun produce neutrons or neutrinos? i read websites of which one is saying neutron is produced but the other one says neutrino is produced..which one is correct..what other things would be produced when hydrogen fuses to produce helium in the core of sun?

uranium is f-block element..is there any relation between f-block elements and nuclear fuel...what i mean is ,i think f-block elements have more probablity of becoming nuclear fuel..is this correct?..

i have some basic doubts...why is that nuclear fission is done only on heavy nucleus..what stops to perform nuclear fission on lighter nucleus..what are the lighter nucleus that are used for fission if any?

[SOLVED] Nuclear fission and amount of U-235 used Homework Statement At the fission of a U-235 atom about 200 MeV of energy is released. How many fissions occur in 1 second in an power plant which has the heat energy capacity of 2050 MW? How much U-235 is consumed in one year (330 days)...

I'm writing a paper on Thorium utilization in nuclear reactors. In this connection I'm looking for figures which describe the neutron capture and neutron fission cross sections over a wide energy range (not only thermal). There are probably some online resources unbeknown to me, any hints?

Homework Statement If Bill put enough radioactive matter in one place, the chain reaction associated with multiple radioactive decays can be made to run out of control and will form an atomic bomb. What do we call this amount of matter? Homework Equations The Attempt at a Solution

Does anyone know what the necessary conditions are for a nucleus to undergo fission with a thermal neutron? I have found something for the chain reactions, but not very helpful. I want to find out the conditions for ONE nucleus to undergo fission with a thermal neutron.

Homework Statement Fission - Nuclear Reaction ( Characteristics, Examples aND Concerns) The attempt at a solution Characteristics: - 1. Heavy nucleus splitting into two or more lighter nuclei. 2. Fission Nuclear Reaction produced large amount of energy Examples: - Nucler Bombs...

As we know the spontaneous fission of an odd nucleus to an 2 odd nuclei happens with high probability when (Z^2)/A is greater than or equals 45 The conclusion of this is attached in pdf file with the post using the liquid drop nucleus model to explain the problem The question is here now...

Homework Statement Consider the following problem: 1) Calculate the energy released in the fission reaction, Uranium(235,92) + neutron--->[Uranium(235,92)]*--->Neodymium(143,60) + Zirconium(90,40)+ 3 neutrons + 8 electrons +8 antineutrino Homework Equations The Attempt at a...

Homework Statement Find the energy released of the follow fission reaction: \displaystyle{^{1}_0}n\; +\; ^{235}_{92}U\; \rightarrow \; ^{88}_{38}Sr\; +\; ^{136}_{54}Xe \;+\; 12 ^{1}_{0}n} Homework Equations E=mc^2 The Attempt at a Solution How come the masses between the...

I have a fission exam next week, can someone help me with this past paper question: If you know the masses of two nuclei (A)Z and (A+1)Z, (say masses are (A) and (A+1)) and you know the 'critical fission energy' of (A+1)Z, how do you determine if (A)Z is fissile? if it is not fissile, at...

in nuclear fusion, 2 nuclei join to make one correct, therefore there is a loss of mass and energy, that energy escapes as gamma rays etc. but in nuclear fission, as the binding energy increases surely energy must have to come from somewhere, but apparently energy is given out? also my...

Why fissions are mostly asymmetric rather than symmetric??

Esp given that most of the energy has yet to be tapped

In each fission event of nuclear 3 neutrons are released. Is that for all nuclear reactions or just U-235?

Hi, I am studying in 10th Standard and preparing for final exams, anyone please help for this following question. When Uranium undergoes Nuclear Fission, 0.1 %(percentage) of total mass is converted into energy. Calculate tota amount of energy in Joules during an explosion of atom bomb...

There's a a paper by J Marvin Herndon about the feasibility of a fission reactor about 5 miles wide at the centre of the Earth,which could generate the geomagnetic field.Someone said in New Scientist magazine that because gravitational forces are nearly zero at the Earth's centre then the heavy...

I can't quite understand critical mass. They say in a fission bomb they have to separate two blocks of fissile Uranium of subcritical mass so they won't undergo spontaneous fission. What exactly is critical mass? Is it just the amount of Uranium held in one place at one time and if so why...

Homework Statement 1. Which of the following statements is / are not correct? (1) In fission, two large fragments of equal masses are produced from a nuclide. (2) Natually occurring elements perform fission spontaneously. (3) 2 H[SIZE="1"]2O --> 2H[SIZE="1"]2 + O[SIZE="1"]2 involves...

Homework Statement 1_0_n + 235_92_U 140_54_Xe + 94_38_Sr + 2 1_0_n Using the above reaction, determine the amount of energy. Homework Equations mi = 235.043925u + 1.008665u + 236.05259u mf = 140.914406u + 93.915356U + 2(1.008665u) = 236.847092Uu delta m = 0.794502 E =...

I have been having an https://www.physicsforums.com/showthread.php?t=145867&page=3" with Morbius on the Nuclear Engineering board about whether the energy released in fission is from the nuclear force or the coulomb force. This quote from Feynman suggests that the energy is from the coulomb...

Need help please :) Matter fission Hi guys! There is a trouble and I need help ) My friend have to write an diplom work and he asked me to search some information about "The Modern classification of matter fission". The title says me nothing as I am not a phisics genius :) Could you please say...

I apologize that me first post is such a silly one. I am trying to solve problem 1.2 in Stacey. It asks for the probability of a 1 MeV neutron slowing to thermal. I can determine the number of collisions required in the water / uranium environment. But, when I go to select the proper...

Hey, I was wondering if somebody out there might be able to help with my problem, by posting a suitable web-link if they happen to know one. I need to know the differences between Fusion and Fission. I understand that fusion is when atoms of a light element are combined to an atom of a heavier...

I have an assignment for which I need the half-life of about 30 nuclei that decay through spontaneous fission. The total half-life is easy to find, but I need the half-life for spontaneous emission only. Does anyone know where I can find this? thanks, Levi

I am new to nuclear. you could answer me one question : why do people say "fission", I thank you

If I'm correct nuclear fusion rockets, (if used the right way), can go up to 10% the speed of light. THis is while nuclear fission goes 5% the speed of light. Yet NASA is working on craft that can make a "Earth-Mars-one way in two months". This is better then our current six month. Yet if I'm...

Hello, I'm looking for the following data: in pure U-235, what is the distribution of ranges of fission products (under thermal neutron irradiation). I know that the distances involved are rather small, but I'm looking for their range. This must have been established somewhere, by...

I'm trying to write a stochastic simulation of a chain fission reaction in an enriched uranium sample (I plan to vary the concentration of U235 - from what I've read 4%U235 vs 96%U238 is what is used in commercial reactors). from my basic understanding of the process, a neutron is fired into...

http://en.wikipedia.org/wiki/Americium" 242 Fission Engine http://www.spaceflightnow.com/news/n0101/19marsnuclear/" this Americium Engine would be interesting to see get started. I still think http://en.wikipedia.org/wiki/Terajoule" shield would out run it in the end. Note: 9.0...

[SOLVED] fusion vs. fission I was trying to describe to my buddy the difference between fusion and fission and my explanation got a jumbled up, which made me realize how I myself don't really understand the difference. My understanding is... fission - two or more particles combines...

This may seem like a crazy or stupid question. Maybe both. What if there was a way to generate fusion using an element like Hydrogen, and then, miraculously, discover a way to generate fission out of the end result (in this case Hellium)? Could the constant fusion-fission between Hydrogen...

Hi, I have a couple of more questions for all the kind and learned people here. Are there any (approx) benchmarks for quantifying how much uranium ore (kg) is going to be rquired in order to generate a given amount of electricity over a specific length of time? Let me clarify...

During the fission of an atom of uranium-235, 200 Mev are released. If the average time between generations of fission reaction is 10e-14 seconds and if each fission reaction gives rise to two fissions in the next generation, calculate the time required to go from the first fission to 100 Kw...

A gallon of gasoline releases 1.91×108 J of energy when it is burned. How many gallons of gas must be burned to release the same amount of energy as is released when 1.87 lb of 235U undergoes fission. (Assume that each fission reaction in 235U releases 181 MeV.) I know this- # gal of gas *...

Can someone help me on this problem? Here's my work :) Calculate the energy released in the fission reaction: n + 235/92U-> Sr-88 + Xe-136 + 12n Use appendix D, assume the initial KE of the neutron is very small It can be seen that when the compound nucleus splits, it breaks into...

When one looks at the diagram neutron energy vs. probability of fission \sigma_f (measured in barns) there is a zone of resonance, characterized by peaks and valleys on the function \sigma_f. Why doesn't conventional nuclear power plants works in this zone, instead of using a moderator to slow...

hey need to write a paper on the advantages and disadvantages of nuclear fission.. this is briefly what i have come up with: Advantages: 1) Nuclear Power: efficient and a good alternative to coal which is exhaustible.. Disadvantages: 1) It resulted in the development of atomic...

I thought this was interesting. On The History Channel there was a show about the crew of the Enola Gay - dropped first atomic bomb on Japan. In the diary of one crewman he comments that as they were hit by the blast wave, another crewman commented that "you can taste fission". "It tastes like...

I'm looking to find out about how much mass is converted to energy during the fission of a U-235 atom. I know that it can differ, depending on how the nucleus is split, but an estimated average would be good. I don't know if it matters, but I'm talking about the fission in a nuclear bomb.

topic pretty much explains it. why is it that fusion releases more energy than fission?

Is it know why the Earth's core, and indeed the cores of other planets, are "hot" while some are cold? Is it possible that fusion or fission processes are taking place there ?

This is probably an easy question for most of you, but me nor my teacher knew. Today we learned that nuclear fission can occur when a neutron "hits" the nucleus of Uranium-235. What i wanted to know is, where does this neutron come from, and how can they make it hit this uranium-235 atom. Any...