Figure 1 shows the experimental setup for measuring beta radiation
, which consisted of a photomultiplier (PMT, R1924, Hamamatsu), preamplifier (Canberra amplifier model 2006), multichannel analyzer (MCA, Canberra Multiport II), and a laptop computer that was powered by a high-voltage power supplier (Canberra model 3102D).
The association of this therapy with local surgical excision of the lesions may also be a promising alternative to surgery alone and may approximate the excellent control rates reported after simple surgical excision followed by 30Gy beta radiation
from a [sup.90]strontium in human superficial conjunctival SCC (KEARSLEY et al., 1988).
All HIV-uninfected patients were treated with adjunctive beta radiation
, and none experienced recurrences during the study period.
Again, caesium-137 decays via beta emission into a radioactive isotope barium-137m with primary beta radiation
of 190 keV.
from iodine-131 damages the surrounding cells and
Their response in indicating biological doses over the range 1 rad to 1,000 rad to gamma, x-ray, and beta radiation
is relatively independent of quantum energy from about 0.03 MeV to 18 MeV, adequate for almost any routine or emergency monitoring of radiation.
The tape is between a beta radiation
source and a detector tracking its decay and so, by tracking how much the build-up of particulate on the tape reduces the readings, the [PM.sub.10] figure can be assessed.
But Thompson's monitoring equipment also indicated that beta radiation
represented about 90% of the radiation to which TMI's neighbors were exposed in April 1979, which means an enormous part of the disaster's public health risk may have been wiped from the record.
For example, in beta radiation
an excess neutron turns into a proton and spews out an electron--a beta particle--and an antineutrino.
However, beta radiation
is more adaptable to changing processes.
NDC got into beta gauges in '93 with the first low-energy source of beta radiation
on the market (200 millicuries of radiation vs.
Gamma and beta radiation
created by neutron capture in the vicinity of the beam will cause backgrounds in the electron and proton detectors.