The stable nuclei are found to have
n
/
p
n
ratio in the range
1
1
to
1.5
1.5
. The nuclei whose
n
/
p
n
ratio lies outside this range
i
.
e
.
,
(
<
1
)
i
or
(
>
1.5
)
(
lose
α
−
α
or
β
−
β
particles so that their
n
/
p
n
ratio shifts into the stability belt.
