Beta-RAM and Gamma-RAM accessories

Beta-RAM and Gamma-RAM accessories

β-RAM

LabLogic offers a broad line of cells for the β-RAM. For liquid scintillation counting there are micro cells with active volumes starting at 2 µL and with dead volumes of 1 µL or less. Standard Teflon coil cells with volumes from 10 µL to 2.5 mL are made with thin-wall tubing for maximum transparency, which leads to the highest counting efficiency. Liquid scintillation applications rarely develop substantial backpressures and the 120 psi [8 bar] working limit of these cells is more than adequate. If you have high backpressure in your liquid cell application, we also offer heavy-wall Teflon coil cells with working pressures to 800 psi [55 bar].

On the other hand, the use of solid scintillators, particularly the finer particle sizes which give improved counting efficiency, results in rather greater backpressures than are experienced with liquid scintillators. When the wall thickness of standard tubing is inadequate, i.e., the anticipated backpressure is 120 psi [8 bar] or more, heavy-wall cells for backpressures to 800 psi [55 bar], and ultra-high pressure potted cells capable of withstanding backpressures to 3000 psi [200 bar] can be supplied. While the heavier walls are less transparent, finer particulate in the high pressure cells means decreased path length for the betas being counted and therefore less energy loss, thereby resulting in overall performance enhancement.

Standard, micro, high pressure and ultra-high pressure cells packed with yttrium silicate, calcium fluoride, or lithium-activated scintillating glass are available. Packed cells eliminate the need for liquid scintillator and ultimately reduce the problems associated with waste disposal. Counting efficiencies are acceptable for more energetic β-emitters beginning with 14C but are marginal or worse for 3H. The major disadvantage of packed cells is that they are prone to contamination, especially with more complex molecules such as proteins and polypeptides, polysaccharides, conjugates, etc. Because of cost of the solid scintillators, packed cells are inherently more expensive than cells for continuous liquid scintillation counting.

For Cerenkov counting, special cells with plastic scintillator windows are offered while for the non-coincidence measurement of soft gamma emitters there are cells with encapsulated thallium-activated sodium iodide or BGO disks.

All measurement cells for the β-RAM are based on our unique design which completely eliminates internal fittings and connections.

Accessories

  • β-RAM scintillation cells
  • γ-RAM cells
  • Scintillation reagents
  • Sealed sources

    • γ-RAM

    For routine continuous-flow measurement of gamma-emitters as well as for the occasional positron-emitter, the γ-RAM Monitor with its heavily shielded integral-line 1-1/2" x 2" well-type sodium iodide crystal/photomultiplier assembly offers the highest possible detection efficiency for gammas up to 1 MeV in energy. However, efficiency is not always so important; especially in preparative work, activity levels are sometimes so high that it is advantageous to deliberately restrict performance in order to keep counting rates below the limits imposed by the detector and the electronics. In developing cell designs for a system such as the γ-RAM, it is therefore necessary to consider not only the gamut of energies that might be encountered but also the potential count ranges that must be handled.

    LabLogic has a series of gamma cells for use with the γ-RAM. The fixed volume cells are designed for both low energy emitters, and for use with energetic isotopes or for very large amounts of activity.

    Scintillation reagents

    LabLogic offers a range of liquid scintillators for use with the β-RAM, each formulated to satisfy particular needs characteristic of flow-through measurement.