Release 1.8.0

• Revise edge jump calculation. Add a test for it. Add edge jump to the f2 plot.
• Add flux calculation for ionization chamber.
• Switch from setup.py to pyproject.toml.

Release 1.7.0

Import Qt by qtpy -- an abstraction layer for PyQt5/PySide2/PyQt6/PySide6.

Release 1.6.0

Add calculate_absorption_background(), which is needed for self-absorption correction by external applications

Release 1.5.1

minor updates (update placeholder texts)

Release 1.5.0

Add two lists of predefined materials -- compounds and elemental.

Release 1.4.5

Improved About dialog
Edited calculation formulas and docstrings

Release 1.4.4

bug fix release

Release 1.4.3

bug fix release

Release 1.4.2

bug fix release

Release 1.4.1

bug fix release