Explanation
The radioactive isotope promethium (wPm) is a type of radioactive material. Used as an excitation source for permanence luminescent materials. In addition to industrial, instrument and military applications, permanence luminescent materials can be applied in civilian applications, such as light switches, plugs, telephone number plates, keyholes, door handles, stair steps, door plates, theater seat numbers, etc. It can also be used as a special sign, such as entrance protection engineering, emergency exit, fire alarm, ship lifebuoy, mining passage, mining tail sign, etc.
Classification
Information materials -> Luminescent materials -> Luminescent materials