The other two occurred in people whose sunglasses lacked side shields.
On its far side, shielded from the Earth's radio noise, there is a quiet zone perfect for radio astronomy — which allows us to see objects we can't from Earth.
The tritium breeding is achieved by having breeding blankets only at the outboard side, while at the inboard side, shielding blankets are placed due to limited space availability.
The gamma-ray beam was collimated by a 5 cm thick lead collimator with 1 cm ∅ opening while the detector was only side shielded allowing scattered gamma-rays to reach the detector from different angles.
The performance of the probe is as follows (ref point: centre of and against aperture): counting sensitivity of > 10 cps/kBq, count rate range of 1 > 50 kcps, count rate linearity of < 10% loss up to 50 kcps, side shielding of < 0.1% and electronic collimation of < 50 mm FWHM at 50 mm distance (for comparison with a general low-energy probe, see Table 2).
Leaded eyeglasses with large lenses and protective side shields provide more protection than eyeglasses without these features.
Leaded eye glasses with protective side shields provide more protection than eye glasses without these features [ 105].
For nitrogen, the presence of hydrogen (amino group) results in a strongly positive potential at their side, shielding the effects of N atoms alone.
Although eye protection are categorized into adequate and inadequate with adequate eye protection including prescription glasses with side shields, face shields, safety glasses and magnifying loupes and inadequate eye protection including prescription glasses without side shields and without adequate frame diameter [ 25].
The physical size and weight of a typical PET probe is primarily a function of the side shielding that is required to block background radiation, to limit the field of view, and to collimate the head of the probe, with the intention to limit the area of the tissue contributing to the probe count rate and to provide better spatial resolution between tissues of differing radioactivity levels [ 1].
Wear safety glasses with side shields under your helmet shade.
