radiation field


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radiation field

[‚rād·ē′ā·shən ‚fēld]
(electromagnetism)
The electromagnetic field that breaks away from a transmitting antenna and radiates outward into space as electromagnetic waves; the other type of electromagnetic field associated with an energized antenna is the induction field.
References in periodicals archive ?
Li Puma, "Photocatalytic mineralization of commercial herbicides in a pilot-scale solar CPC reactor: photoreactor modeling and reaction kinetics constants independent of radiation field," Environmental Science and Technology, vol.
The second term, which depends on the acceleration of the charge, is the radiation field. The first term is called the velocity field.
They are as follows: (i) the radiation field generated from [S.sub.1] as the charge accelerates when the current is initiated, (ii) the radiation field generated from [S.sub.2] during the charge deceleration as the current is terminated, (iii) the electrostatic field generated by the negative charge accumulated at [S.sub.1] when the positive charge travels towards S2, (iv) the electrostatic field generated by the accumulation of positive charge at [S.sub.2], and (v) the velocity field generated as the current pulse moves along the element.
This is because both the cavity wall and the radiation field are used to define the system.
Table 7 shows the times and changes in the TLD protocol for the NBS/NIST environmental radiation field monitoring program.
When a subparcel reaches the site at [x.sub.0] it adsorbs and creates a photon so that some amplitude flows from [psi](x)[[PSI].sub.N], the photon free wavefunction of the system, to [[PSI].sub.N+1,A], the single photon and N+1 particle wavefunction with a radiation field flowing away from it.
The unit of radiation field is determined by the value of absorbed dose in air at different distances from the source of radiation.
"The optical and ultraviolet light from stars continues to travel throughout the universe even after the stars cease to shine, and this creates a fossil radiation field we can explore using gamma rays from distant sources," lead scientist Marco Ajello from the Kavli Institute for Particle Astrophysics and Cosmology at Stanford University in California and the Space Sciences Laboratory at the University of California at Berkeley said.
These applicators attach to the treatment units and define the radiation field size applied during treatment.
The LAI allows investigators to search for and find radiation sources by using a moving vehicular platform with complete insensitivity to local variations in the ambient radiation field. Currently, naturally occurring fluctuations limit instruments" from detecting materials in ranges on the order of 10 m.
of Tubingen, Germany) represent the theoretical and experimental developments in the process, which strives to describe the coupling of the radiation field to the electron-atom system, and the status of the comparison and extent of agreement between them.
(2) They usually arise from the margins of the radiation field. Head and neck lesions account for 13 to 16% of radiation-induced sarcomas.

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