eV and keV are units of energy commonly used in physics and chemistry to describe the energy of particles and electromagnetic radiation (such as X-rays and gamma rays). Here’s what they stand for:
This is a unit of energy equal to the amount of kinetic energy gained or lost by an electron when it is accelerated through an electric potential difference of one volt. One electronvolt is approximately equal to 1.602 × 10^-19 joules. The electronvolt is commonly used in atomic and particle physics to describe energy levels of electrons in atoms and the energy of individual particles in accelerators.
This is a unit of energy that is equal to one thousand electronvolts (1 keV = 1000 eV). It is often used when dealing with larger energy values, such as those associated with X-rays, gamma rays, and nuclear reactions. KeV is particularly useful for describing the energy levels of photons emitted or absorbed by atomic nuclei or in various types of spectroscopy.
1eV = 0.001keV
E(keV) = E(eV) / 1000
Example – Convert 500eV to keV
Ans. E(keV) = 500eV / 1000 = 0.5keV
Also Check: Electron-volts to joules conversion
| Energy (eV) | Energy (keV) |
| 1 eV | 0.001 keV |
| 2 eV | 0.002 keV |
| 3 eV | 0.003 keV |
| 4 eV | 0.004 keV |
| 5 eV | 0.005 keV |
| 6 eV | 0.006 keV |
| 7 eV | 0.007 keV |
| 8 eV | 0.008 keV |
| 9 eV | 0.009 keV |
| 10 eV | 0.01 keV |
| 20 eV | 0.02 keV |
| 30 eV | 0.03 keV |
| 40 eV | 0.04 keV |
| 50 eV | 0.05 keV |
| 60 eV | 0.06 keV |
| 70 eV | 0.07 keV |
| 80 eV | 0.08 keV |
| 90 eV | 0.09 keV |
| 100 eV | 0.1 keV |
| 200 eV | 0.2 keV |
| 300 eV | 0.3 keV |
| 400 eV | 0.4 keV |
| 500 eV | 0.5 keV |
| 600 eV | 0.6 keV |
| 700 eV | 0.7 keV |
| 800 eV | 0.8 keV |
| 900 eV | 0.9 keV |
| 1000 eV | 1 keV |
| 2000 eV | 2 keV |
| 3000 eV | 3 keV |
| 4000 eV | 4 keV |
| 5000 eV | 5 keV |
| 6000 eV | 6 keV |
| 7000 eV | 7 keV |
| 8000 eV | 8 keV |
| 9000 eV | 9 keV |
| 10000 eV | 10 keV |
| 100000 eV | 100 keV |
The thermal energy kT, where k is the Boltzmann constant and T is the temperature in Kelvin, is approximately 25.7 millielectronvolts (meV) at room temperature (300 K).
1 kilo electronvolt (keV) is equal to 1000 electronvolts (eV), or 1 × 10^3 eV.
1 electronvolt (eV) is equal to approximately 1.602 × 10^-19 joules (J), which is the fundamental charge of an electron times one volt.
1 kilo electron-volt (keV) is equivalent to 1000 electronvolts (eV), or 1 × 10^3 eV.
At a temperature of 300 K, kT is approximately 25.7 millielectronvolts (meV), or 2.57 × 10^-2 eV.
The kinetic energy (KE) in electronvolts (eV) can be calculated using the equation: KE = 1/2 * m * v^2, where m is the mass in electron mass units and v is the velocity in terms of the speed of light (c). 1 eV is the energy gained by an electron when accelerated through 1 volt.
To convert kilo electronvolts (keV) to volts (V), divide the energy in keV by the fundamental charge of an electron (approximately 1.602 × 10^-19 coulombs). This will give you the voltage in volts.