PAA Sage

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PAA_Research PAA on Sage Brush


The volatile oil content of sage brush is known to be a strong indicator of both the flammability of sagebrush as well as its forage value for open range livestock<ref name="Sage1968">File:SageBrushMg-vs-VolOil Powell.pdf </ref>. The volatile oils in sagebrush leaves impede the growth of rumen micro-organisms thereby decreasing an animal's appetite. The amount of Magnesium in sagebrush leaves has been shown to be strongly correlated with the volatile oil content of sagebrush. We studied the potential to use Photon Activation Analysis at the Idaho Accelerator Center as a means to measure the Magnesium content of sagebrush. The figure below illustrates our ability to identify the presence of Magnesium in sagebrush leaves. With further work, this method has the potential to provide ranchers and fire prevention services with a means of monitoring the forage value and fire risk of Idaho's sagebrush population.

Preliminary results

MagInSagePAA 7-3-2017.png

10perc 07032017 1369keVLin.png


Calibration Detect A

Source Energy (keV0 Channel
Th Rod 238.8 (highest peak)
Ba-133 276.398 632.9
Th Rod 338.8 (4th highest) 772.106
Ba-133 356 811.78
Na-22 511 1159.92
Th Rod 583.4 (2nd highest peak) 1322.244
Cs-137 661.7 1497.84
Th Rod 911.2 (3rd highest) 2059.4
Na-22 1274.5 2875.50
Th Rod 2614.6 5886.485

MPA Fit: (-5.74857) + (0.445818)*x + (-2.04348e-7)*x^2

Calibration Detect D

Source Energy (keV0 Channel
Th Rod 238.8 (highest peak)
Ba-133 276.398 99.996
Th Rod 338.8 (4th highest)
Ba-133 356 423.85
Th Rod 511
Th Rod 583.4 (2nd highest peak)
Cs-137 661.7 1666.93
Th Rod 911.2 (3rd highest)
Na-22 1274.5 4159.6
Th Rod 2614.6

MPA Fit: () + ()*x + ()*x^2