process whereby the energy absorbed by an atom causes the outermost electron to jump to a higher energy level
the absorption of light energy by a fluorescent molecule, during which an electron in the molecule is boosted to a higher energy level.
delivering (inducing, transferring) energy into the "spinning" nuclei via radio-frequency pulse(s), which puts the nuclei into a higher energy state. By producing a net transverse magnetization an MRI system can observe a response from the excited system.
the process of raising the energy of an atom, ion or molecule from some low energy state to some higher energy state.
The unstable state of an atom or a nucleus caused by external agents or by a radioactive decay. When caused by external agents, the system (atom or nucleus) absorbs energy from the surroundings. An excited system, sooner or later, undergoes the process called de-excitation.
An atom or molecule is said to be excited when it has absorbed sufficient energy to raise it above the normal or ground-level state, but not enough to ionize it.
putting energy into the spin system; if a net transverse magnetization is produced, an NMR signal can be observed.
The input of energy into matter, leading to the emission of radiation.
The process of imparting to an atom or an ion an amount of energy greater than it has in its normal or least-energy state.
A complex mechanical drive train system, such as that found in a helicopter, generates a wide range of vibration forces at their fundamental rotational frequencies and harmonics. These are termed excitation forces which can be imparted into the airframe structure.
Laser light of a specific color (wavelength) that is absorbed by certain types of molecules exciting them to a higher energy state. It is important that the stokes-shift be large enough that the excitation wavelength be far enough away from the emission wavelength to prevent interference.
The process of raising an atom to a higher energy level.
A process by which radiation imparts energy to an atom or molecule without causing ionisation. Dissipated as heat in tissue.