Question

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Q. (i) What characteristics property of nuclear force explains the constancy of

binding energy per nucleon (BE/A) in the range of mass number ‘A’. lying 30 < A <

170?

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(ii) Show that the density of nucleus over a wide range of nuclei is constant independent

of mass number A.
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Answer 1

i )

The approximate constancy of BE/A over most of the range is saturation property of nuclear force.

In heavy nuclei, nuclear size > range of the nuclear force.

So a nuclear sense approximately a constant number of neighbors and thus the nuclear BE/A levels off at high A. This saturation of the nuclear force.

Second Answer in Attachment.