doppler broadening वाक्य
उदाहरण वाक्य
मोबाइल
- The production mechanism of annihilation radiation introduces Doppler broadening.
- Molecular-scale Doppler broadening will also contribute.
- Doppler broadening has also been used as a design consideration in high temperature nuclear reactors.
- Doppler broadening therefore creates a negative feedback because as fuel temperature increases, reactor power decreases.
- Fast reactor control cannot depend solely on Doppler broadening or on negative void coefficient from a moderator.
- This is called doppler broadening . talk ) 01 : 29, 3 May 2010 ( UTC)
- Doppler broadening can also be used to determine the velocity distribution of a gas given its absorption spectrum.
- For example, a combination of the thermal Doppler broadening and the impact pressure broadening yields a Voigt profile.
- In electromagnetism, spatial dispersion plays a role in a few material effects such as optical activity and doppler broadening.
- If the rate of fission increases, temperature will increase and Doppler broadening will occur, decreasing the rate of fission.
- When the nuclear fuel increases in temperature, the rapid motion of the atoms in the fuel causes an effect known as Doppler broadening.
- Either one measures the Doppler broadening of the annihilation radiation ( DBAR ) or the angular correlation of the annihilation radiation ( ACAR ).
- So Doppler broadening in the moderator, which affects thermal neutrons, does not work, nor does a negative void coefficient of the moderator.
- The thermal energy of the nucleus also has an effect; as temperatures rise, Doppler broadening increases the chance of catching a resonance peak.
- An increase in fuel temperature also raises U-238's thermal neutron absorption by Doppler broadening, providing negative feedback to help control the reactor.
- Doppler broadening of U-238's neutron absorption resonances, increasing absorption as fuel temperature increases, is also an essential negative feedback mechanism for reactor control.
- To overcome the problem of Doppler broadening without cooling down the sample to millikelvin temperatures, a classical, and rather general, scheme in experimental physics is used, a pump-probe scheme.
- Changes in reactivity in fuel due to temperature stem from a phenomenon known as doppler broadening, where resonance absorption of fast neutrons in fuel filler material prevents those neutrons from thermalizing ( slowing down ).
- Saturated absorption spectroscopy, also known as Doppler-free spectroscopy, can be used to find the true frequency of an atomic transition without cooling a sample down to temperatures at which the Doppler broadening is minimal.
- The Doppler broadening of gases in motion allows the determination of properties via the resulting frequency shift . Scanning lidars, such as the conical-scanning NASA HARLIE LIDAR, have been used to measure atmospheric wind velocity.
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