Alpha Particles (α)
CAS Number:
N/A
Alpha particles are a form of ionizing radiation emitted by radioactive materials such as uranium, thorium, radium, and radon. Because alpha particles have low penetrating power and are stopped by a sheet of paper or the outer layer of skin, external exposure is generally not a concern. However, inhalation or ingestion of alpha-emitting radionuclides — most notably radon gas in mines and buildings — poses a significant internal radiation hazard and is a leading cause of lung cancer among non-smokers. Industrial hygienists monitor alpha particle activity in environments such as uranium mining, nuclear fuel processing, and radiological laboratories.
Alpha particle monitoring helps identify contamination risks where alpha-emitting materials may be present. Rent alpha detection instruments from RAECO Rents for radon and remediation work, mining and milling environments, and nuclear or research facilities. Our team provides practical guidance on the right detector and survey approach, with fast turnaround and phone support so you can collect usable field readings.
Regulatory Exposure Limits
As of March 09, 2026
OSHA PEL
TWA:
N/A
STEL:
N/A
C:
N/A
NIOSH REL
TWA:
N/A
STEL:
N/A
C:
N/A
ACGIH TLV
TWA:
N/A
STEL:
N/A
C:
N/A