alculate the macroscopic scattering cross section for natural uranium.

Question

alculate the macroscopic scattering cross section for natural uranium. Given p = 18.9 g/cm³, percentage weight of 235U in natural uranium is 0.713; the rest being 238 U. The scattering cross sections for 235 U and 238 U isotopes being 15 b and 13.8 b, respectively.

19 Apr 2025

Answer :

Word Count : 375

To calculate the macroscopic scattering cross section (Σ_s) for natural uranium, we need to consider the contributions from both uranium-235 (U-235) and uranium-238 (U-238) isotopes.

First, let's determine the number density (N) of uranium atoms in the given sample. The density (p) of natural uranium is 18.9 g/cm³, and we know the molar mass of uranium (U) is approximately 238 g/mol.

1. Calculate the molar number of atoms per unit volume:
The number of moles per cm³ is given by:
\[
n_{U} = \frac{p}{M_{U}} = \frac{18.9 \, ____ ____ _____ ______ ____ __________ _______ _______.
_______ ________ _________ ____ _______ _____ _____ ___ ________ ___ ______.
_________ ___ ___ _____ _____ __________ _______ __________ _______ ____ ________.
_________ _____ _______ _________ _________ _________ _____ ________ _____ ____.
_______ ____ _________ ______ ____ ____ _____ ______.
______ ______ _____ _______ _____ _____ __________ ______ ________ ______.
__________ ___ ___ ___ ____ _______.
_________ ______ ____ _____ _________ _________ __________ ___ ___ _______ _________ _______.
_____ _______ ____ ______ ______ ________ ___ ______ _______.
_________ _______ __________ _____ ___.
_______ ____ ____ ___ ___ ____ _________ _________.
____ ________ ____ ____ ____ _______.
________ ____ ________ __________ ________ __________.
_____ ________ ___ ________ ___ _________.
__________ ____ _________ _______ ______ ____ _________ ___ _______ ______.
_______ __________ ____ ______ ________ ____ __________ __________ ___ _______.
________ ______ ________ ______ ___ ______ _____ ______ ___.
__________ ______ _______ ___ ___.
______ ___ ____ __________ __________ _____ __________ _________ _____ ______ ______ __________.
____ ______ _____ ______ ________ _______.
________ _____ ____ ____ ____.
__________ ____ ________ ___ __________ ______ _________ ____.
________ __________ ___ _______ __________ ______ ________ _____ ______ _________ __________ __________.
_________ ___ ____ ________ ____ ____ _____ ______ ______ _______.
___ _________ ______ _________ _______ __________ ____ ______.
___ _______ ________ _______ _____ ______ ________ ___ ____ ____.
___ ___ __________ _______ _________ ______ _________ ______ ____ ____.
_____ ________ ___ ________ __________ ____.
_______ ____ ____ ___ ________ _________ ____ _______ ________.
____ ____ __________ ______ ________ _______ ______ _________ _____ ________ ____ ______.
____ _________ ___ _________ ____ _________ _______ _______ ____ _______ ___ _______.
__________ _________ _____ _____ _____ __________ _______ __________ __________ __________ ______.
____.
Get Full Answer on WhatsApp

IGNOU Solved Assignments Assignments Ignou Projects Project Previous Year Solved Exam Papers Notes Notes Sample Question Papers Sample Question Papers

IGNOU NEWS

Assignment Submission Last Date Extended Till 30 June 2026 Click Here★★★IGNOU June 2026 TEE Date Sheet Released Click Here★★★