The electron cross-section, often referred to as the electron scattering cross-section or simply the electron cross-section, is a term used in the fields of nuclear and particle physics to describe the likelihood of electrons interacting with other particles, such as atomic nuclei or other electrons, when they are subjected to various types of scattering experiments or interactions.
The electron cross-section is typically expressed in units of area, such as square meters (m²) or square femtometers (fm²), and it represents the effective target area presented by an electron for a particular type of interaction or scattering process. It is used to quantify the probability of electron interactions occurring in various experimental setups.
A square decimeter (often abbreviated as dm²) is a unit of area in the International System of Units (SI). It represents a square with sides that each measure 1 decimeter (10 centimeters) in length.
One square decimeter is equal to 0.01 square meters (m²) because each side of the square is 10 centimeters long, and when you square that length, you get 0.01 square meters.
To put it in perspective, a square decimeter is a relatively small unit of area. It is often used for measuring small areas, such as the surface area of small objects, pieces of paper, or the dimensions of certain materials in scientific and technical contexts.