Question: A kiloton atomic bomb is fueled with pure (Fig. 43-14), of which actually undergoes fission. (a) What is the mass of the uranium in the bomb? (It is not 66 kilotons—that is the amount of released energy specified in terms of the mass of TNT required to produce the same amount of energy.) (b) How many primary fission fragments are produced? (c) How many fission neutrons generated are released to the environment? (On average, each fission produces 2.5 neutrons.)
(a) The mass of the Uranium is 84kg.
(b) The number of the produced fragment is 1.71.
(c) The number of the neutron released to the environment is .
The mass, m = 66kilotonn
The 4% of the total mass is actually fissionable.
The expression to calculate the released energy is given as follows.
The expression to calculate the number of fission is given as follows.
Here, Q is the energy per fission.
The expression to calculate the number of the fragment produced is given as follows.
n = 2n …… (3)
The typical energy released per fission is Q = 200MeV
The mass in megaton is .
Calculate the released energy.
Substitute for m and for into equation(1).
Calculate the number of the fission.
Substitute for E and 200MeV for Q into equation (2).
Since the 4% of the total mass is actually fissionable. Therefore, the original nuclei present is,
Calculate the mass of the uranium.
By rounding up the value of the mass of the uranium is 84kg.
Hence, the mass of the Uranium is 84kg.
Calculate the number of the fragment.
Substitute for n into equation (3).
Hence, the number of the produce fragment is .
It is given that, on average, each fission produces 2.5 neutrons. Therefore, number of the neutron released to the environment would be the 2.5 time the number of the fission.
Hence, the number of the neutron released to the environment is .
Question: Consider the fission of by fast neutrons. In one fission event, no neutrons are emitted and the final stable end products, after the beta decay of the primary fission fragments, are . (a) What is the total of the beta-decay events in the two beta-decay chains? (b) Calculate for this fission process. The relevant atomic and particle masses are
Question: In a particular fission event in which is fissioned by slow neutrons, no neutron is emitted and one of the primary fission fragments is . (a) What is the other fragment? The disintegration energy is Q = 170 MeV. How much of this energy goes to (b) the fragment and (c) the other fragment? Just after the fission, what is the speed of (d) the fragment and (e) the other fragment?
The uncompressed radius of the fuel pellet of Sample Problem 43.05 is . Suppose that the compressed fuel pellet “burns” with an efficiency of 10%—that is, only 10% of the deuterons and 10% of the tritons participate in the fusion reaction of Eq. 43-15. (a) How much energy is released in each such micro explosion of a pellet? (b) To how much TNT is each such pellet equivalent? The heat of combustion of TNT is 4.6 MJ/kg . (c) If a fusion reactor is constructed on the basis of 100 micro explosions per second, what power would be generated? (Part of this power would be used to operate the lasers.)
94% of StudySmarter users get better grades.Sign up for free