Well, well, well…

Rainwater, stream water… what about groundwater? This was one of the pieces of my project that. although being central to my research question, came into play fairly late in the game. I want to prove that not only 22Na provides an accurate age for water, but that it can provide accurate ages at a greater resolution, along a single groundwater flowpath. The diagram below illustrates one single flowpath. Water enters at a point on a slope, and as it travels through the ground, is youngest at point A, getting older and older until it eventually enters the stream. If I were to sample water from points A, B, and C, would aging the samples with 22Na provide successively older ages? This is the question I am still trying to answer.

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Seeking clarity

So after processing and retrieving all the sodium from the water, quantifying the concentration of 22Na provided another challenge. To do this, I used a scintillation cocktail. As the 22Na deyaed, it released beta particles. These particles interact with the cocktail and cause it to flash. By counting these flashes, I could determine the quantity of 22Na in the sample.

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