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Nuclei
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Nuclear Fusion
Nuclear Fusion
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Important Questions
A nucleus with mass number A=240 and BE/A=7.6 MeV breaks into two fragments each of A=120 with BE/A=8.5 MeV. Calculate the released energy?
Or Calculate the energy in fusion reaction:
2
1
H
+
2
1
H
→
2
3
H
e
+
n
where BE of
2
1
H
=2.23 MeV and of
3
2
H
e
=7.73 MeV.
Medium
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>
The binding energy per nucleon in deuterium and helium nuclei are
1
.
1
M
e
V
and
7
.
0
M
e
V
, respectively. When two deuterium nuclei fuse to form a helium nucleus the energy released in the fusion is :
Medium
NEET
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>
A certain mass of Hydrogen is changed to Helium by the process of fusion. The mass defect in fusion reaction is
0
.
0
2
8
6
6
u
. The energy liberated per
u
is (given
1
u
=
9
3
1
M
e
V
)
Medium
NEET
View solution
>
In the fusion reaction
1
2
H
e
+
1
2
H
→
2
3
H
e
+
0
1
n
, the masses of deuteron, helium, and neutron expressed in amu are
2
.
0
1
5
,
3
.
0
1
7
and
1
.
0
0
9
, respectively. If
1
k
g
of deuterium undergoes complete fusion, find the amount of total energy released.
(
1
a
m
u
=
9
3
1
.
5
m
e
V
/
c
2
)
Hard
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>
Suppose, we think of fission of a
2
6
5
6
F
e
nucleus into two equal fragments of
1
3
2
8
A
l
. Is the fission energetically possible? Argue by working out Q of the process. Given m
(
2
6
5
6
F
e
)
= 55.93494 u and m
(
1
3
2
8
A
l
)
= 27.98191 u.
Medium
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>
Calculate he energy in fusion reaction:
1
2
H
+
1
2
→
2
3
H
e
+
n
,
where
B
E
of
1
2
H
=
2
.
2
3
M
e
V
and of
2
3
H
e
=
7
.
7
3
M
e
V
?
Medium
View solution
>
The binding energies per nucleon for a deuteron and an
α
-particle are
x
1
and
x
2
respectively.What will be the energy Q released in the reaction
1
H
2
+
1
H
2
+
→
2
H
e
4
+
Q
Medium
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>
Distinguish between nuclear fission and fusion. Show how in both these processes energy is released. Calculate the energy release in MeV in the deuterium-tritium fusion reaction :
1
2
H
+
1
3
H
→
1
4
H
e
+
0
n
1
Using the data:
m
(
1
2
H
)
=
2
.
0
1
4
1
0
2
u
m
(
1
3
H
)
=
3
.
0
1
6
0
4
9
u
m
(
2
4
H
e
)
=
4
.
0
0
2
6
0
3
u
m
n
=
1
.
0
0
8
6
6
5
u
l
u
=
9
3
1
.
5
M
e
V
/
c
2
Medium
View solution
>
When four hydrogen nuclei combine to form a helium nucleus estimate the amount of energy in MeV released in this process of fusion ( neglect the masses of electrons and neutrons )
given:
(i) mass of
1
1
H
=
1
.
0
0
7
8
2
5
u
(ii) mass of helium nucleus = 4.002603 u
1
u
=
9
3
1
M
e
V
.
c
2
Medium
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>
The energy released during the fission of 1 kg of uranium
:
Medium
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>
