 Bubble Technology Industries’ MICROSPEC systems were the first truly portable spectroscopic instruments
providing the two essential pieces of information required by health physicists - dose rate and radionuclide
identification. In addition to an extensive line of photon probes, BTI offers the only commercially
available portable beta spectrometer, the B-PROBE.
Skin dose measurements using traditional thin-window GM counters have been extremely
difficult for three reasons: GM counters do not provide any spectral information; the detector efficiency
depends on beta energy; and GM detectors do not differentiate against low-energy photons. The BTI B-PROBE
solves all these deficiencies using a unique phoswich scintillator. The radiation doses displayed using the
B-PROBE are calculated directly from the measured spectral information.
As shown in the three figures below, the spectra measured by the B-PROBE agree very
accurately with calculated beta spectra and doses agree within five percent. Since beta particles with
energies less than a few hundred keV are not a significant concern in health physics, the B-PROBE operates
from approximately 100 keV to 3 MeV. Truly accurate values of Hs (0.07) and radionuclide identification are
quickly determined with this easy-to-use portable instrument.
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