Nuclear Definition and 997 Threads

Me again, with another potentially ignorant nuclear science question: Why isn't tungsten used to prevent meltdown in nuclear reactors? If tungsten has a higher melting point of tungsten is almost 6200 degrees Fahrenheit, and nuclear meltdown happens when the uranium fuel is some 5200 degrees...

Homework Statement I'm perpetually confused keeping track of the energetics of a nuclear reaction and I broke down my conceptual questions into the following parts statement a-In a fission reaction, the two medium sized daughter nuclei each have more binding energy per nucleon than the original...

Homework Statement This is a conceptual question I have, the binding energy per nucleon is mass defect*c^2/mass number while the packing fraction is mass defect/mass number. A higher binding energy per nucleon indicates a more stable nucleus BUT a smaller packing fraction indicates a more...

This relates to the anthropic principle and the multiverse. Nuclear Processes in Other Universes: Varying the Strength of the Weak Force https://journals.aps.org/prd/pdf/10.1103/PhysRevD.98.063014 Nuclear processes in other universes: Varying the strength of the weak force Alex R. Howe, Evan...

Hi, If we compare LWR and HWR (CANDU), which reactor type produces more waste per used Uranium? And also, between these reactors, is there a difference at the time required for the spent fuel to be completely safe? For LWR, It is around 100 000 years. But what about HWR? Thank you in advance.

I am a graduate nuclear engineer(no Master yet), and I ask if nuclear battery(radioisotope thermoelectric generator, that use plutonium-238 as heat source) can be simulate by MCNP5. And is their any card in MCNP5 treat or deal with thermoelectric converions. Thanks

I've noticed that in the Shell Model of the nucleus, the order of the energy levels is 1s, 1p3/2, 1p1/2, etc. While in the atomic energy levels it goes 1S 2S 2P, ... But they still take the same amount of particles for each level in both the atomic and nucleus. Am I missing something here? Or...

Let me start out by saying that I have no idea what I'm talking about. I graduated from Indiana University with a Bachelor's in Spanish, and I work as a Loan Review Specialist at a bank, which has NOTHING to do with my degree, and still yet nothing to do with this topic. But lately, I've become...

Hi There is a story that Enrico Fermi calculated the intensity of the first nuclear test at Los Alamos from the distance moved by scraps of paper. Are there documented details of the calculation in any paper / book ? TIA

Hello What are benefits of nuclear power plant electricity than hydro power generated electricity Does it cost less per unit any or the waveform is pure sine wave how engineer build it .

Hi! I am on my way to complete a two-year postdoc. I have BSc, MSc and PhD in nuclear engineering. My research focuses are severe accident analysis, thermal-hydraulics and CFD. Since it is very likely that my current employer cannot ensure a future temporary/permanent position, I am looking for...

I am not talking about the reactions of simple atoms in chemistry, I am speaking, for example deuterium, heavy water, isotopes of hydrogen, oxygen, carbon, etc.I would like to know how to calculate when two atoms merge, to know mathematically what atom will form, example deuterium + deuterium =...

The field I am willing to work on is thermal hydraulics, I am more into the industry than academic work. I am now lost . the 2 options I have is either get a masters in nuclear engineering or maybe in mechanical engineering, or go into the industry and work in energy companies " which is hard to...

Hi guys, we have all heard that the world has enough nuclear weapons do destroy the human kind. But is this true? I made a small research on wikipedia and it mentions: https://en.wikipedia.org/wiki/List_of_states_with_nuclear_weapons the total available nuclear warheads in the world are at the...

Hi, I'm simulating in MCNP6 the reaction of proton beam on targets but in the simulation the 96% of the proton are lost for energy cutoff. I don't understand why happen that. I use a tally4 to obtain the reaction in the target, but I suppose the results are wrong because the lost of protons (if...

Homework Statement A certain odd-parity shell-model state can hold up to a maximum of 4 nucleons. What are its values of J and L? What about an odd-parity shell-model state with a maximum of 6 nucleons? Homework Equations Parity = (-1)L J = L+S Total angular momentum, J, is equal to orbital...

NMR textbooks often state that an ensemble of nuclei cannot absorb the excitation radiowaves if the spin population is "saturated" (wherein "saturated" is often described as equal spin population in all energy states, or a population inversion). But these same NMR textbooks show that a 180...

What is the difference between parallel and antiparallel spins for a pair of nucleons? My understanding is that nucleons have a strong tendency to pair - proton with proton, neutron with neutron, proton with neutron. When they pair their spins either: cancel (spins pair antiparallel) pairing...

Homework Statement An antimuon and electron may bind together via Coulomb attraction and then decay, but is the following process possible? (µ+e-) → νe + νµ_bar *The νµ_bar is the antiparticle of the muon neutrino - the antimuon neutrino More than one answer (below) may be correct. a)...

Other than Helium do Noble gases with even nuclear spin form superfluids? Is there a simple quantum mechanical explanation why the difference below of the Melting point and Boiling point of the Noble gases is roughly the same value? A yes or no would suffice. From...

(It became really long as I wrote, so I put my main questions at the bottom, so you can skip to it if you want) Hi guys, I got BS and MS in Nuclear Engineering. Research for undergrad, I did intern/design class at Argonne running monte-carlo simulation, so modelling neutronics and burnup of a...

Hi all, I'm looking for a book that talks about civil nuclear technologies (water reactors, molten salt, etc.): - Either to emphasize the beauty of the technology from an engineering point of view. - Or the historical development of the technology (in terms of engineering more than politics ...

Zirconium from fission product cannot be safely used as it contains 93Zr which is radioactive. However, zirconium is also used for fuel cladding and building some other parts of a reactor, which is already a radioactive environment thus its own radioactivity is no longer a concern. So, is it...

Consider chain of two radioactive decays ##A \to B\to C##. The equation that regulates ##N_B## is $${\frac {\mathrm {d} N_{B}}{\mathrm {d} t}}=-\lambda _{B}N_{B}+\lambda _{A}N_{A}$$ I can't understand why the activity of ##B## is get as ##\lambda_B N_B##, for example at page 20 here...

The average loss of energy in a material per unit length of a particle (in particular an electron, which is stable) is described by the quantity ##dE/dx##. - for ionization it is given by the Bethe-Bloch formula $$-\left\langle {\frac {dE}{dx}}\right\rangle ={\frac {4\pi }{m_{e}c^{2}}}\cdot...

Consider a proton-neutron system. Phenomenlogical nucleon-nucleon potentials contain exchange forces terms (Majorana, Bartlett and Heisenberg terms), which are linked to the symmetry of the state w.r.t. (for example) the exchange of isospin (i.e. charge). On the other hand proton and neutron...

The (residual) strong force between nucleons can be desribed as - The exchange of a meson (from a nucleon to the other), as in picture b) - The exchange of a quark and an antiquark: in picture a) one nucleon "gives" a quark and receive an antiquark and it's the opposite for the other I do...

The potential energy associated to the interaction between nucleons has its minimum (point of equilibrium) at ##r\sim 0.7 fm##, as showed in the following graph: Nevertheless, there are two facts that are, apparently, in contrast with this: - The average distance between nucleons is...

In particle phyisics four-momentum is used and De Broglie relation is used to understand what lenghts can be "seen" in an experiment. Here (page 6) https://people.phys.ethz.ch/~pheno/PPP/PPP2.pdf it is claimed Where ##Q^2## is not actually "momentum" but its the square of the four momentum...

Greetings to such good forum! I cannot abandon the Science despite of all my attempts... :D So recently I have started discussion with one Scientifist, on the another forum. The topic of discussion was a role of Mass-Energy-Speed of light formula in development of Nuclear Weapon. I have stated...

Homework Statement A proton of kinetic energy 0.42 x 10-11 J is fired at a stationary oxygen-18 which has a binding energy of 2.35 x 10-11 J. This reaction produces flourine-18 of binding energy 2.30 x 10-11 J with the production of a neutron and gamma ray. Q1) Explain why the high energy...

Myself satyabhaskar. I completed my bachelor's degree with 93% and I got 3rd rank in AUCET with the specialization of physics.Now I have a small confusion about which subject i want to choose in msc physics.My main aim is to get a govt job if it is not possible then after i will enter into...

< Mentor Note -- thread moved to HH from the technical physics forums, so no HH Template is shown > Question: An experiment is proposed to directly measure the width (Γ) and mass (m_H) of the Higgs boson via the reaction: muon+ + muon- > H. Sketch a graph of the expected cross section as a...

I'd appreciate any reference or citation shows what is the change of the nuclear radius at resonance states, especially for 56Fe and 40Ca. Thank you

Hi There! I am exploring career options in Nuclear Physics, exactly speaking, Theoretical Nuclear Physics. One of the ways to pursue a career in the field is of course in the academia, as a Professor and Researcher. But as we know, sustaining in the academia is not an easy job. I was wondering...

Homework Statement The frequency of a tsunami large enough to threaten the safety of a nuclear power plant has been estimated to be 1 in 200 years. If the plant’s life is 65 years what is the probability it will be damaged by such a tsunami? What is this probability more commonly termed? [2...

Hi, PF, this should be my 5th post or something here in "Academic Guidance" (I changed my mind a lot in few months :biggrin:, but now I really need to decide:nb):nb)) I'm considering to go for an MS in Nuclear Engineering that specializes in Nuclear System Physics...

Hello, can you please confirm this statement "Nuclear fusion does not require a minimum mass to occur (critical mass), which is instead a characteristic limit of fission. So you can make small fusion bombs as much as you want."? Thanks!

Homework Statement i have a little confusion with this problem the problem is asking me to calculate "how long could you fuel the 99 current reactors in the US?" Homework Equations The problem is asking for an evaluation of fuel energy value in comparison to demand edit:(i forgot to add that i...

Copyright reserved to Prof. Verma and NPTEL, Govt. of India. For more details on NPTEL visit http://nptel.ac.in

Copyright reserved to Prof. Verma and NPTEL, Govt. of India. For more details on NPTEL visit http://nptel.ac.in

Copyright reserved to Prof. Verma and NPTEL, Govt. of India. For more details on NPTEL visit http://nptel.ac.in

Copyright reserved to Prof. Verma and NPTEL, Govt. of India. For more details on NPTEL visit http://nptel.ac.in

Copyright reserved to Prof. Verma and NPTEL, Govt. of India. For more details on NPTEL visit http://nptel.ac.in

Copyright reserved to Prof. Verma and NPTEL, Govt. of India. For more details on NPTEL visit http://nptel.ac.in

Copyright reserved to Prof. Verma and NPTEL, Govt. of India. For more details on NPTEL visit http://nptel.ac.in

Copyright reserved to Prof. Verma and NPTEL, Govt. of India. For more details on NPTEL visit http://nptel.ac.in

Copyright reserved to Prof. Verma and NPTEL, Govt. of India. For more details on NPTEL visit http://nptel.ac.in

Copyright reserved to Prof. Verma and NPTEL, Govt. of India. For more details on NPTEL visit http://nptel.ac.in