Natural Sciences >> ChemistryNeptunium Cascade Kineticsby Kateryna Matiash
Submitted : Spring 2015 Abstract. The goal of this project was to calculate the amount of actinium, the last relatively nontransient isotope in the neptunium cascade, after 1 year in the series of radioactive decays of ^{237}Np and its intermediates. These computations were done by solving known firstorder linear differential equations and deriving the consecutive ones for further intermediates. The number of particles per million (ppm) for actinium225 was then found as a difference between the initial amount of ^{237}Np and the sum of all of the decay intermediates’ particles. Ultimately, the calculations involved substituting for the initial amount of Np and decay constants known from radioactive isotopes’ halflives to calculate quantities of isotopes for each of the reaction’s steps.
Keywords. Neptunium237, actinium225, neptunium cascade, intermediates, successive radioactive decay. Related Links:
