JC261 Neutron Putty can be used for the collimation of neutrons and for plugging neutron shine paths.
JC261 is a non-hardening boron loaded LDPE putty that contains 10% boron combined with a high hydrogen content. A 25mm thickness will attenuate thermal neutrons by a factor of approximately 105.
Neutron Putty can be kneaded by hand to obtain the desired consistency and workability. It can be softened by warming it up slightly for added workability. Disposable gloves are recommended when handling as the putty is quite sticky.
|Composition Data||Important Properties|
|Hydrogen atom density/cm³||5.91 x 10²²|
|Hydrogen weight percent||8.95%|
|Boron atom density/cm³||6.16 x 10²¹|
|Boron natural isotope distribution||19.6% ¹⁰B and 80.4 % ¹¹B|
|Boron weight percent||10.00%|
|Total Density||1.11 g/cm³ (69 lbs/ft³ )|
|Macroscopic thermal neutron cross section||4.67 cm⁻¹|
|Gamma resistance||5 x 10⁸ rad|
|Neutron resistance||2.5 x 10¹⁷n / cm²|
|Odor||No significant odor|
|Recommended Temperature Limit||45°C (110°F)|
|Chemical Name & Synonyms||Borated poly putty (LDPE)|
|Trade Name & Synonyms||JC261 Neutron Putty|