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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


 

George MacDurmon

University Radiation Safety Officer

127 Biomedical Sciences Building

940 Stanton L. Young Boulevard

Oklahoma City, OK    73190

Office:  (405) 271-6121

Fax:      (405) 271-1768 (fax)



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