# Neutron lethargy is defied as Use the result of Problem 13 and show that neutron lethargy in terms..

Neutron lethargy is defied as  Use the result of Problem
13 and show that neutron lethargy in terms of the nucleus mass number may be
expressed as _ § 2/(A + 2/3). [Hint: Finde an energy-averaged lethargy.
The probability distribution function for elastic scattering and isotropic in
the center of mass is 1/(1  _)E].

Problem 13

Use the diagram showing neutron velocity before and after a
collision to conclude that:

where a = [(A  1)/(A + 1)]2 is known as the
collision parameter. Use this relation to:

a) find the angle corresponding to the minimum energy of the
emerging
View complete question »

Neutron lethargy is defied as  Use the result of Problem
13 and show that neutron lethargy in terms of the nucleus mass number may be
expressed as _ § 2/(A + 2/3). [Hint: Finde an energy-averaged lethargy.
The probability distribution function for elastic scattering and isotropic in
the center of mass is 1/(1  _)E].

Problem 13

Use the diagram showing neutron velocity before and after a
collision to conclude that:

where a = [(A  1)/(A + 1)]2 is known as the
collision parameter. Use this relation to:

a) find the angle corresponding to the minimum energy of the
emerging neutron ( Emin _)

b) find Emin _ , the minimum energy of the
emerging neutron

View less »

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