X-ray photometry X-ray spectrometry atom-tagging atomic science atomics atomistics atomology curiescopy fluoroscopy mass spectrography mass spectrometry molecular physics nuclear chemistry nuclear physics orthodiagraphy photofluorography quantum mechanics radiation physics radiobiology radiochemistry radiography radiological physics radiometallography radiometry radiopathology radioscopy radiotechnology radiotherapy roentgenography roentgenology roentgenoscopy spectroradiometry thermionics tracer investigation wave mechanics