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Observations show that neutron stars spin very rapidly.
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∙ 12y ago
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Why fission cannot take place with fast neutron?
In order to cause an atomic nucleus to become unstable so that it will undergo fission, you have to add a neutron. If a slow neutron collides with an atomic nucleus, it will be absorbed into the nucleus and become part of it. The nuclear attraction of the nucleus is strong enough to grab a slow neutron. But a fast neutron cannot be captured because it has too much kinetic energy. The attraction of the nucleus is not enough to stop the motion of a fast neutron. Even if a fast neutron makes a direct hit on an atomic nucleus, it is just going to bounce off.
Fast neutron detection by helium 3 ionization chamber?
Helium-3 has a high cross section for thermal neutron absorption. For fast neutrons you must either thermalize the neutrons for use with boron or helium-3 based proportional counters or use a fast fission chamber based on fast fission of uranium. It's worth noting that a uranium based fast fission detector is really only useful in extraordinarily high neutron fluxes like that of a reactor.
Why do scientist try to predict natural disasters?
They happen so fast
What releases a fast moving electron from a neutron in the nucleus?
In beta decay, a neutron becomes a proton, an electron, and a neutrino (or maybe an anti-neutrino -- we're not sure).
What is a rapidly spinning neutron star called?
A young neutron star. Really - that is what a neutron star is. If the neutron star's magnetic field is pointed towards Earth, then it is referred to as a pulsar - because of it's rapid pulsations [See related question] but it is still a neutron star.
What will happen if fast-moving neutron strikes with uranium?
When U-238 absorbs a fast neutron it forms plutonium-239
Why fission cannot take place with fast neutron?
In order to cause an atomic nucleus to become unstable so that it will undergo fission, you have to add a neutron. If a slow neutron collides with an atomic nucleus, it will be absorbed into the nucleus and become part of it. The nuclear attraction of the nucleus is strong enough to grab a slow neutron. But a fast neutron cannot be captured because it has too much kinetic energy. The attraction of the nucleus is not enough to stop the motion of a fast neutron. Even if a fast neutron makes a direct hit on an atomic nucleus, it is just going to bounce off.
Name the element when uranium captures a fast neutron?
The element is determined by the number of protons. When uranium captures a fast neutron it is still uranium but has an increased atomic mass. Fast neutron capture may encourage a further reaction but it depends on which uranium isotope you start with as to the increase in probability some further reaction will occur and which reaction that might be.
Fast neutron detection by helium 3 ionization chamber?
Helium-3 has a high cross section for thermal neutron absorption. For fast neutrons you must either thermalize the neutrons for use with boron or helium-3 based proportional counters or use a fast fission chamber based on fast fission of uranium. It's worth noting that a uranium based fast fission detector is really only useful in extraordinarily high neutron fluxes like that of a reactor.
Why do scientist try to predict natural disasters?
They happen so fast
Is uranium 238 a slow or fast neutron absorber?
uranium 238 is a fast neutron absorber the answer is correct but for more explanation:- when uranium 238 is bombard by neutron >>> uranium 238 , undergoes B decay>>>Np 239 ,undergoes B decay >>> Pu 239 finally undergoes alpha decay >>> fissile U
What has the author Kenneth Dwight Dobbin written?
Kenneth Dwight Dobbin has written: 'Construction and calibration of a fast neutron spectrum generator' -- subject(s): Neutron sources
What releases a fast moving electron from a neutron in the nucleus?
In beta decay, a neutron becomes a proton, an electron, and a neutrino (or maybe an anti-neutrino -- we're not sure).
What is a rapidly spinning neutron star called?
A young neutron star. Really - that is what a neutron star is. If the neutron star's magnetic field is pointed towards Earth, then it is referred to as a pulsar - because of it's rapid pulsations [See related question] but it is still a neutron star.
What has the author Jerry Baskervill Marion written?
Jerry Baskervill Marion has written: 'Fast neutron physics'
Can fast neutron and photon have same speed?
No, a photon always moves at the speed of light, and nothing with non-zero mass (which includes neutrons) can move that fast
Why U 235 is fissioned by thermal neutron while U 238 by a fast neutron?
It's to do with the capture cross-section of the nucleus. It just happens that the U-235 nucleus has a much larger cross-section for neutron capture when the neutrons are slow, and that the subsequent nucleus is unstable and splits into two parts. With U-238, it does not undergo fission at all, it just absorbs the fast neutron and transmutes to Pu-239. As to the fundamental reason for this, it is in the complex nuclear physics field of study
