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The difference between fast and slow neutrons is in the amount of energy they possess. Fast neutrons tend to "blow through" the nucleus of some isotopes. This causes a disruption but, because they don't stay around, the nucleus restabilizes. Slow, or thermal, neutrons, however, may get absorbed by the same nucleus, which then destabilizes, causing fission.

It should be pointed out that nuclei of different isotopes are affected differently by neutrons. 238U is caused to divide more frequently by a faster neutron, while 235U is caused to divide more frequently by thermal (slower) neutrons, and 233U is caused to divide more or less equally by any.

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What is the difference between slow and fast FHSS?

Fast frequency hopping spread spectrum (FHSS) systems switch between frequencies rapidly, usually several times per second, to avoid interference and jamming. Slow FHSS systems switch between frequencies less frequently, providing a more predictable and stable connection but potentially making them more vulnerable to interference.


Explain the difference between slow FHSS and fast FHSS?

Slow frequency-hopping spread spectrum (FHSS) systems hop between frequencies at a lower rate, typically around 1-5 hops per second, while fast FHSS systems hop at a higher rate, often over 20 hops per second. The main difference lies in the speed of frequency hopping, with fast FHSS providing increased resistance to interference and higher data transmission rates compared to slow FHSS systems.


What is the function of a moderator in a reactor?

A moderator in a nuclear reactor slows down fast-moving neutrons to increase the likelihood of fission reactions. By reducing the speed of neutrons, the moderator helps maintain a chain reaction within the reactor core. This process helps control the nuclear reaction and sustain the reactor's power output.


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


Why moderator is not required in fast reactors?

a moderator would slow the neutrons, hindering breeding

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