Answer:
D. scholars
Explanation:
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Scintillation crystals are used exclusively as detectors in fourth-generation CT scanners
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Scintillation crystals are used exclusively as detectors in _______CT scanners
a. electron beam
b. third-generation
c. fourth-generation
d. spiral
Scintillation counters are widely used in medical imaging used to measure radioactive contamination, radiation measurement gauges, radiation measurement testing, nuclear power plant safety, and radiation.
Scintillation is the process by which the energy of a specific radiation interacting with a certain amount of sensitive material (called a scintillator) is converted into electromagnetic waves. The frequencies of the electromagnetic waves emitted are in or near the visible spectrum.
A scintillator is a substance that exhibits scintillation, the property of luminescence, when excited by ionizing radiation. When a luminescent material collides with an approaching particle, it absorbs the energy and glows (that is, it re-emits the absorbed energy in the form of light).
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Today's individual is an ‘Atomic’ individual. But he is not be entirely blamed for this. The market economy and Internet technology have brought changes at every level of life. It has essentially made consumer out of an individual . ‘I’, ‘Me’ and ‘Mine’ have become more important than ‘We' and ‘Our’. We have become a self centric society. In a consumerist society empathy, innocence and cooperation have little space and social life is largely dominated by intelligence, smartness and self centeredness.
The size of the empire, at its prime it comprised of 60 million people and a territory of 2 million square miles -- for comparison, the contiguous area of the US, that is, without Alaska and Hawaii is 3.1 million square miles. The Roman Empire was mostly formed by conquered peoples and terriotories, so civil wars and rebellions against a state that had became bureaucratic and demanded lots of taxes was quite common, also the size of the state permitted that the different tribes from the north, the so-called barbarians would attch from different points, so basically a gigantic state which had to deal with internal an external problems is the cause of this difficulty.
