Question

Please let me know about the basics of Phosphorescent and Fluorescent materials.? Thank you.

Answer 1

Both are scintillation process where radiation excites electrons in molecules and causes subsequent emission caused by transition from excited state to lower energy states

Explanation:

The difference between the two is that the decay from excited states occurs more rapidly in fluorescence than in phosphorescence.
https://courses.engr.illinois.edu/npre441/lecture_notes/lecture_chapter5_scintillator_detectors.pdf
https://en.wikipedia.org/wiki/Scintillation_(physics)
https://en.wikipedia.org/wiki/Scintillator