Linear attenuation coefficient definition of Linear attenuation coefficient in the Free Online Encyclopedia.

attenuation coefficient [ə‚ten·yə′wā·shən ‚kō·ə′fish·ənt]

(electromagnetism)

The space rate of attenuation of any transmitted electromagnetic radiation.

Attenuation Coefficient

(or extinction coefficient), a quantity inverse to the distance at which the radiation flux forming a parallel beam is attenuated as a result of the joint action of the absorption and scattering of light in a medium by a specified factor. When the factor is 10, the coefficient is called the decimal attenuation coefficient, and when the factor is e, it is called the natural attenuation coefficient. The attenuation coefficient is the sum of the absorption coefficient and the scattering coefficient of the medium. These coefficients depend on the set of frequencies v, or wavelengths λ, that characterize the initial flux. The value of the attenuation coefficient for the limiting case of a single frequency v is called the monochromatic attenuation coefficient. Like the absorption and scattering coefficients, the attenuation coefficient can be divided by the volume of the medium or by the mass of the attenuating substance; we shall call these two ratios the volume and mass attenuation coefficients, respectively.

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No references found	12b) The asymmetry and broadening from specimen transparency is greatest for low absorption materials and is clearly evident when the linear attenuation coefficient [mu] < 50 c[m. Fundamental parameters line profile fitting in laboratory ... by Cline, J.P. / Journal of Research of the National Institute of Standards and Technology Loftus noted that his measured linear attenuation coefficient for air at laboratory conditions was 0. New national air-kerma-strength standards for [.sup.125]I and ... by Coursey, Bert M. / Journal of Research of the National Institute of Standards and Technology The linear attenuation coefficient for air at room conditions based on the measurements is 1. Exposure standardization of iodine-125 seeds used for brachytherapy by Loftus, T.P. / Journal of Research of the National Institute of Standards and Technology	line-turn line-use ratio line-voltage regulator linea alba Línea, La lineage lineage structure Lineament linear linear - logarithmic intermediate - frequency amplifier Linear A and Linear B linear accelerator linear accelerator breeder linear accelerator-driven reactor linear accelerator-regenerator reactor linear actuator linear address space linear aerospike engine Linear Algebra linear algebraic equation linear amplifier linear approximation linear argument linear array linear assignment Linear attenuation coefficient linear birefringence linear bounded automaton linear burning rate linear circuit linear cleavage linear collider linear collision cascade linear combination linear combination of atomic orbitals linear comparator linear computing element linear conductor antenna linear congruence linear control linear control system linear density Linear Dependence linear detection linear differential equation Linear Differential Equations linear diffuser linear dimension linear discriminant function linear distortion linear electrical constants of a uniform line	Linear Alkyl Benzene Sulfonate Linear Alkyl Benzene Sulphonic Acid Linear Alkylbenzene Sulfonate Linear Almost-Periodically Time Varying Linear Amplification using Nonlinear Components Linear amplifier Linear Amplifier Circuit Linear Amplifier Unit Linear Amplitude Distortion Linear and Whorled Nevoid Hypermelanosis Linear animal Linear Antenna Impedance Linear Application Development Linear approximation linear argument linear array linear array linear array transducer linear array transducer linear array transducer Linear Array with A Reconfigurable Pipelined Bus System Linear Array with Double Beam linear assessment linear assessment linear assessment linear assessment linear assignment Linear assignment problem Linear associative algebra linear atrophy Linear attenuation coefficient Linear Augmented Slater-Type Orbital Linear Automatic Protection Switch Linear B Linear B script Linear Back-Off Linear Band ware Linear Band Ware culture Linear Binary Block Channel Code Linear Binary Code linear birefringence Linear Bit-Estimate Linear block code Linear Bounded Arrival Process Linear bounded automata Linear bounded automaton Linear Brushless Direct Current Motor linear burning rate Linear Cable Engine Linear Calibration Range linear causation Linear Cellular Array Linear Ceramic culture Linear Ceramics Culture Linear circuit

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12b) The asymmetry and broadening from specimen transparency is greatest for low absorption materials and is clearly evident when the linear attenuation coefficient [mu] < 50 c[m.

Fundamental parameters line profile fitting in laboratory ... by Cline, J.P. / Journal of Research of the National Institute of Standards and Technology

Loftus noted that his measured linear attenuation coefficient for air at laboratory conditions was 0.

New national air-kerma-strength standards for [.sup.125]I and ... by Coursey, Bert M. / Journal of Research of the National Institute of Standards and Technology

The linear attenuation coefficient for air at room conditions based on the measurements is 1.

Exposure standardization of iodine-125 seeds used for brachytherapy by Loftus, T.P. / Journal of Research of the National Institute of Standards and Technology

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