Gamma Putty with Bismuth - 2 lb Container

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Gamma Putty with Bismuth - 2 lb Container

1-lnch of Gamma Putty is roughly equivalent to 0.4-lnch of lead for gamma shielding applications
 • It is non-hardening and it will not dry out to form a powder
 • Reusable and lead-free

Gamma Putty is a malleable gamma shielding clay that contains no lead. It contains high-density bismuth that is uniformly distributed throughout the LOPE binder material to ensure there are no gamma streaming paths. The additive is elemental bismuth, 90% by weight, and the material will not dry out to form a powder. It is supplied in chunks that are readily pliable by hand and holds its shape after placement.

Gamma Putty provides a simple means of protecting patients from damage to adjacent healthy tissue during irradiation of tumors and other confined areas. It provides an accurate, reproducible technique for obtaining small ports in shields molded to fit the patient.

Radiation Properties
Macroscopic thermal neutron cross section:0.01 cm⁻¹
Lead equivalent thickness (inch): 0.39
Attenuation Factors for 1-inch

200 keV: 1.9 x 104
500 keV: 4.7
1.0 MeV: 2.0

Attenuation Factors for 2-inch
lr-192: 30
Cs-137: 8.4
Co-60: 3.0
Gamma resistance: 5 x 10B rad
Neutron resistance: 2.5 x 1017 n/cm² 

Composition Data
Hydrogen atom density/cm³: 3.28 x 102 2
Hydrogen weight percent: 1.44%
Bismuth atom density/cm³: 9.89 x 102 1
Bismuth weight percent: 90.0%
Total Density: 3.81 g/cm³ (238 lbs/ft³)

Physical Properties
State: Putty
Color: Gray
Odor: No significant odor
Machinability: Poor

Thermal Properties
Recommended Temperature Limit: 110° F (45° C)

Chemical Properties
Chemical Name & Synonyms: Bismuth poly putty (LOPE)

Approximate 1/10 Thickness

Specifications
Non-hardening
Net Weight: 2 lbs
Density: 3.8 g/cc

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