All Questions
Tagged with scattering-cross-section nuclear-physics
50
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Hydrogen and deuterium reaction with neutrons
In my book "Introduction to nuclear engineering" by John R.Lamarsh and Anthony J.Baratta,
(4th edition), they explain
"The nuclei 1H and 2H, which are present in large amounts in many ...
- 51
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1
answer
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Maximum number of partial waves and matching point
I have read that a large number of partial waves, around 200, are required in a situation such as ${}^{16}$O incident on ${}^{152}$Sm at c.m. 65 MeV in Coulomb excitation
Anybody familiar with ...
- 1,405
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1
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Calculating Scattering matrix of a nuclear fusion reaction using Fortran
I am trying to find out the $S$-matrix elements for the reaction:
$${}^{19}\textrm{F} + {}^{208}\textrm{Pb}. $$
The model followed is Direct reaction model where the optical potential is:
$$ V_{op}(r) ...
1
vote
1
answer
145
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Physical mechanism of $s$-wave neutron resonances in nuclear physics
In this answer by Arturo don Juan, and also, in section $7.8$ of Sakurai's Modern Quantum Mechanics, it is argued that resonances in the scattering cross-section at certain energies are due to the ...
- 11.8k
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Reducing Inelastic Electron-Proton's Scattering Cross Section to Rosenbluth's Formula
I'm currently studying electron-proton scattering from Halzen & Martin's book (Quarks & Leptons : An Introductory Course in Modern Particle Physics). I found that the cross section for the ...
4
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Scattering off spherical well - thermal neutron absorption and $1/v$ behaviour
I am attempting to describe the $\sigma_{abs} \sim 1/v$ behaviour for thermal neutron absorption by heavy nuclei. In Krane's "Introductory Nuclear Physics" he first computes the cross-...
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149
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Why is the nuclear fission of $U^{235}$ cross section by slow neutrons so large?
The fission cross section of $U^{235}$ by slow neutrons is huge, around 584barns = 58400 fm$^2$ according to https://en.wikipedia.org/wiki/Uranium-235, however the geometrical cross section of a $U^{...
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How is the Neutron capture cross section of Xenon-135 so high?
Xenon-135 has a Neutron capture cross section of 2-3 million barns, this is equivalent in area to a disk with a radius of 8-10pm. The cross sectional area of a Uranium nucleus is roughly 1 barn. The ...
- 2,908
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17
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Mathematically, how proximity potential affect the nuclear cross section?
I have difficulties in linking proximity potentials with the nuclear cross-section.
2
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2
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How to estimate $d$-wave nuclear scattering cross section?
I would like to estimate the $\ell=2$ ($d$-wave) contribution to elastic scattering cross section (or scattering length) for collisions such as $n$-$n$ and $n$-$p$ at low energy (a few MeV or less). I ...
- 59.6k
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Luminosity of an elastic proton-proton scatter
Suppose you have a proton beam ($E=500\,\textrm{MeV})$ with a current of $$6 \cdot 10^{-12}\,\textrm{A} $$ that is colliding with a gaseous hydrogen target which is $3\,\textrm{cm}$ thick. The total ...
- 308
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Conversion of Reich-Moore resonance parameters to neutron cross section?
For the Single-Level Breit-Wigner (SLBW) formula, the peak resonant neutron cross section is related to the total width, $\Gamma = \Gamma_{(n)} + \Sigma_{r}\Gamma_{(r)}$, reported as GT in ENDF. For ...
0
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1
answer
52
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Where can I find photon absorption cross-sections for various isotopes?
I am looking for absorption cross-sections for photons. Usually, I am dealing with neutron absorption where I utilize https://www.nndc.bnl.gov/endf/ for my data. This is a really handy website that ...
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Resonant states in elastic scattering
My question is simple, and I'm hoping the answer is also simple!
Lets say I have a neutron and I scatter it off of an iron nucleus. Lets say that this is non-relativistic elastic scattering and I ...
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Is there a correction due to metric tensor effects in the calculus of nuclear cross-sections?
Gravitation force is negligible at the nucleus scale, but since cross-sections are essentially surfaces of interaction one should expect large effects due to the metric tensor being affected by masses....
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