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Low-energy Charged Particles in Atomic and Molecular Gases
Low-energy Charged Particles in Atomic and Molecular Gases

... D. Effects of constituents of the interaction potential on low-energy cross sections E. The special role of the point charge-induced dipole interaction F. Boundary conditions and scattering quantities G. Quantum-mechanical description of collision dynamics: scattering from a central potential H. Qua ...
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Draw a cross section along the line of section (B
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LESSON 4 - UMD | Atmospheric and Oceanic Science
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Particle Physics
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Customized Delivery of Photodynamic Therapy to Tumor Sites

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Cross section (physics)



The cross section is an effective area that quantifies the intrinsic likelihood of a scattering event when an incident beam strikes a target object, made of discrete particles. The cross section of a particle is the same as the cross section of a hard object, if the probabilities of hitting them with a ray are the same. It is typically denoted σ and measured in units of area.In scattering experiments, one is often interested in knowing how likely a given event occurs. However, the rate depends strongly on experimental variables such as the density of the target material, the intensity of the beam, or the area of overlap between the beam and the target material. To control for these mundane differences, one can factor out these variables, resulting in an area-like quantity known as the cross section.
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