The effective neutron capture radius of a nucleus having a cross-section of 1.0 barr is [Given, 1 barr =1.0 10⁻²⁴ ~cm ^2 ]

Step-by-step solution

1.0 barr =1.0 10⁻²⁴ ~cm ^2=10⁻²⁸ ~m ^2 The area of a circle is given by A= r^2 Hence, aligned r & = A / & = (1.0 10⁻²⁴ ~cm ^2 ) / 3.14 & =5.6 10⁻¹³ ~cm aligned