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Radionuclide Information

NUCLIDE: H-3

TYPE(S) OF RADIATION	ENERGY	PERCENT DISINTEGRATION	RANGE IN AIR	RANGE IN WATER	SHIELDING REQUIRED

Beta	18.6 keV (max)	100%	6 mm	0.006 mm	None

Physical half-life 12.3 years

Survey instruments: none practical

Removable quantification method: smear and count in liquid scintillation counter

Personal dosimeter: none required

NUCLIDE: C-14

TYPE(S) OF RADIATION	ENERGY	PERCENT DISINTEGRATION	RANGE IN AIR	RANGE IN WATER	SHIELDING REQUIRED

Beta	156 keV (max)	100%	24 cm	0.28 mm	Plexiglass shielding reduces dose, but for microcurie amounts none is required

Physical half-life: 5730 years

Survey instruments: GM use for gross contamination is possible, but efficiency is poor.

Removable quantification method: smear and count in liquid scintillation counter

Personal dosimeter: none required

NUCLIDE: S-35

TYPE(S) OF RADIATION	ENERGY	PERCENT DISINTEGRATION	RANGE IN AIR	RANGE IN WATER	SHIELDING REQUIRED

Beta	167 keV (max)	100%	26 cm	0.32 mm	Plexiglass shielding reduces dose, but for microcurie amounts none is required

Physical half-life: 87.4 days

Survey instruments: GM use for gross contamination is possible, but efficiency is poor.

Removable quantification method: smear and count in liquid scintillation counter

Personal dosimeter: none required

NUCLIDE: P-32

TYPE(S) OF RADIATION	ENERGY	PERCENT DISINTEGRATION	RANGE IN AIR	RANGE IN WATER	SHIELDING REQUIRED

Beta	1.71 MeV (max)	100%	790 cm	0.76 cm	1 cm Plexiglass

Physical half-life: 14.3 days

Survey instruments: GM survey meter

Removable quantification method: smear and count in liquid scintillation counter

Personal dosimeter: Whole body and extremity dosimeters

NUCLIDE: P-33

TYPE(S) OF RADIATION	ENERGY	PERCENT DISINTEGRATION	RANGE IN AIR	RANGE IN WATER	SHIELDING REQUIRED

Beta	249 keV (max)	100%	49 cm	0.6 mm	Plexiglass shielding reduces dose, but for microcurie amounts none is required

Physical half-life: 25.4days

Survey instruments: GM survey meter

Removable quantification method: smear and count in liquid scintillation counter

Personal dosimeter: Whole body and extremity dosimeters for higher activities

NUCLIDE: I-125

TYPE(S) OF RADIATION	ENERGY	PERCENT DISINTEGRATION	SHIELDING REQUIRED

Te K X-rays	27-32 keV	140 %	Half-value-layer is 0.02 mm Pb
Gamma	35 keV	7% emitted; 93% internally converted

Physical half-life: 60.2 days

Volatility (@STP): substantial in disassociated form or in acidic solutions

Survey instruments: thin-window NaI scintillator; GM survey meter is less efficient.

Removable quantification method: smear and count in liquid scintillation counter or gamma counter

Personal dosimeter: Whole body and extremity dosimeters for higher activities

The Radiation Safety Office
Biomedical Sciences Building (BMSB), Room 127.

Phone: (405) 271-6121 or (405) 271-1768 (fax)

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