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Electron emission is the process when an electron escapes from a metal surface. Every atom has a positively charged nuclear part and negatively charged electrons around it. Sometimes these electrons are loosely bound to the nucleus. Hence, a little push or tap sets these electrons flying out of their orbits.

What is the difference between thermionic emission and photoelectric emission? During thermionic emission electrons are emitted from metal surface by providing heat energy, whereas, during photoelectric emission light energy is emitted when, electrons are emitted from the surface of metal.

Because the wavelength of thermal neutrons corresponds to the natural spacings between atoms in crystalline solids, beams of thermal neutrons are ideal for investigating the structure of crystals, particularly for locating positions of hydrogen atoms, which are not well located by X-ray diffraction techniques.

The heating element is usually an electrical filament heated by a separate electric current passing through it. ... In a directly heated cathode, the filament is the cathode and emits the electrons. In an indirectly heated cathode, the filament or heater heats a separate metal cathode electrode which emits the electrons.

thermal radiation, process by which energy, in the form of electromagnetic radiation, is emitted by a heated surface in all directions and travels directly to its point of absorption at the speed of light; thermal radiation does not require an intervening medium to carry it.

• Define Thermions. Thermions synonyms, Thermions pronunciation, Thermions translation, English dictionary definition of Thermions. n. An electrically charged particle, especially an electron, emitted by a conducting material at high temperatures. therm′i·on′ic adj. American Heritage®...

• Functions and features of Thermion models as well as their performance can be upgraded and improved with the release of new software. Interchangeable standard power supplies for Axion XM, Axion XQ, Axion XQ LRF, Digex, Proton XQ, Proton FXQ and Thermion devices.

• The concept of thermionic refrigeration was proposed by Mahan in 1994. Given two metal plates, at different temperatures, applying a voltage to encourage electrons to flow from cold to hot through the vacuum gap causes the cold electrode to become colder.

• The name arises from thermionic emission, which is the thermal excitation of hot electrons from a metal surface. Metals have an energy difference between the chemical potential and the vacuum energy, which is called the work function e ϕ.

Define Thermions. Thermions synonyms, Thermions pronunciation, Thermions translation, English dictionary definition of Thermions. n. An electrically charged particle, especially an electron, emitted by a conducting material at high temperatures. therm′i·on′ic adj. American Heritage®...

Functions and features of Thermion models as well as their performance can be upgraded and improved with the release of new software. Interchangeable standard power supplies for Axion XM, Axion XQ, Axion XQ LRF, Digex, Proton XQ, Proton FXQ and Thermion devices.

Thermionic emission is a process that occurs when heat is applied to a metallic surface. This process has been used in practical applications in the past and continues to be used today. This lesson discusses thermionic emission and its applications.

Boasting state-of-the-art design and the latest in advanced technological innovations, the Pulsar Thermion delivers the premium thermal imaging you’ve come to expect, but on a traditional-style aircraft-grade 30 mm-tube.