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Computational Analysis Of The Relative Decay Constants For 7be, 7be+, And 7be++

Student Name: Hutchison, Mark
Advisor Name: Peterson, Bryan G.
Approval Date: 8/1/2009
Report Type: Senior Thesis
Title: Computational Analysis Of The Relative Decay Constants For 7be, 7be+, And 7be++
Abstract: The actual decay constant for neutral beryllium 7 (7Be) is unknown because it has always been measured with a substantial loss of its 2s electrons due to bonding or interstitial effects. By considering free 7Be ions (such as may appear in a low density non-neutral plasma) we can potentially calculate the electron charge density at the nucleus with more accuracy and this can be used to calculate relative changes in the decay constant for ionized states of 7Be. We use both Hartree–Fock self-consistent field (HF SCF) and Density Functional Theory (DFT) methods for calculating the relative changes in the decay constants for 7Be, 7Be+, and 7Be++ and find that there is a non-linear relationship between the decay constant and the fractional amount of 2s electrons still present in the nucleus.
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