XAS Analysis

Contents

XAS Analysis#

X-ray Absorption Spectroscopy (XAS) analysis measures ROI intensity across an image stack. XASAnalyzer is the analyzer for XAS analysis. Drift correction is available as an explicit step before intensity extraction. If correct_drift method is not called, the raw image is used for analysis. The shift information can be separately accessed from the method calculate_drift(). The analyzer uses the FullFieldBase base class for drift correction logics.

Example#

from pyleem.analysis.xas import XASAnalyzer
from pyleem.reader import UViewReader, read_files
from pyleem.roi import RectROI

readers = read_files(
    ["xas_0.dat", "xas_1.dat", "xas_2.dat"],
    reader_cls=UViewReader,
    metadata_list=[
        {"Beam Energy": (280.0, "eV")},
        {"Beam Energy": (281.0, "eV")},
        {"Beam Energy": (282.0, "eV")},
    ],
)
roi = RectROI(top=20, left=30, bottom=80, right=90)

analyzer = XASAnalyzer(readers, roi=roi)
analyzer.correct_drift(sigma=3, crop_size=128)
intensities = analyzer.get_intensities()

ax = analyzer.plot_intensity()
Contents