Assembly Materials

BC-634A is a silicone-adhesive coupling compound for making an optically clear bond between the scintillator and photomultiplier tube. BC-634A is formulated for use within the temperature range of -10 to +60^oC, has an index of refraction of 1.42 and an internal transmission >98% around 400nm.  BC-634A is a self-wetting, flexible pad just hard enough to resist tearing while handling.

Note: If you cannot maintain sufficient interface pressure, apply a thin film of coupling grease to both sides of the interface pad. 

We supply BC-634 as ready-to-use disks in specified diameters and in thicknesses of 1, 3 and 6 mm.

BC-637 interface pads are a silicone-adhesive coupling compound for making an optically clear bond between the scintillator and photomultiplier tube. BC-637 is rated to 200 C.

BC-621 is a highly efficient reflector employing a special grade of titanium dioxide in a water-soluble binder. It is applied directly onto plastic scintillators, acrylic light guides, glass and metals. It is not intended for direct contact with liquid scintillators (use BC-622A for that application). It is a diffuse reflector, and, therefore, should not be applied to sheets of scintillator or light guide material where the length is much longer than the thickness.

BC-621 provides an excellent combination of high reflectivity, excellent resistance to yellowing with age, good adhesion, and ease of application. It is recommended for all scintillators having emission spectra above 415nm.

Application
BC-621 should be stirred or shaken well before using. It may be applied by brushing or spraying, and may be diluted with water as required. Equipment may be cleaned with cold or warm water and detergent. When the reflector is dried, it is not affected by moisture.
Two to three coats are recommended. Allow each coat to dry at room temperature before applying another layer. 300ml covers approximately a square meter with one sprayed coat

BC-622A reflector paint made from cross-linked polyurethane resin with exceptional chemical resistance to aromatics hence best-suited for use with liquid scintillators. It is particularly useful in large, steel or aluminum tanks, which require application of the paint at the research site.

It is a diffuse reflector and, therefore, should not be used on the major surfaces of long, narrow tanks (total internal reflector and employed in these).

Note: Can be removed from metal by submersing in Methanol alcohol.

BC-638 is a black adhesive tape 2" (50.8mm) wide by .008" (0.2mm) thick. Wrapping a plastic scintillator in one layer will give you a light-tight seal.

BC-640 is an adhesive-backed masking paper routinely used for protecting the surfaces of plastic scintillator during handling or storage.

BC-642 Teflon® tape is frequently used as a reflecting material for non-hygroscopic scintillators. Three layers give you optimum reflectivity.

BC-490 is a partially polymerized plastic scintillator that is cured to full hardness by the end user. The scintillator thus formed is clear with scintillation and mechanical properties similar to those of general-purpose plastic scintillators. It is most frequently used in applications which require other materials to be embedded in the scintillator, and which require the casting of unique shapes (often in special holders).

BC-490 is supplied in complete kits with detailed instructions. Each kit contains three parts: partially polymerized scintillator resin, catalyst, and catalyst solvent.

¹ "Spin Coating Thin Films of Plastic Scintillator" E. Norbeck et al., Nucl. Inst. & Meth., A262 (1987) 564-547.