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...Geiger counter a is common instrument that detects beta and gamma radiation uses ions produced by to create an electrical current general organic biological chemistry structures of life e pearson education inc karen c timberlake units for measuring activity include the following curie ci number disintegrations occurs in s g radium equal becquerel bq si unit which disintegration rad absorbed dose measures amount gram material such as body tissues rem equivalent humans effects different kinds alpha particles do not penetrate skin however if they enter extensive damage may occur high energy causes more than includes protons neutrons travel into tissue rays are damaging because long way through determine or multiplied factor adjusts caused particular form about measurement often will be millirems mrem sievert sv...