A neutron probe is a device used to measure the quantity of water present in soil.
A typical neutron probe contains a pellet of americium-241 and beryllium. The alpha particles emitted by the decay of the americium collide with the light beryllium nuclei, producing fast neutrons. When these fast neutrons collide with hydrogen nuclei present in the soil being studied, they lose much of their energy. The detection of slow neutrons returning to the probe allows an estimate of the amount of hydrogen present. Since water contains two atoms of hydrogen per molecule, this therefore gives a measure of soil moisture.
A neutronprobe is a device used to measure the quantity of water present in soil. A typical neutronprobe contains a pellet of americium-241 and beryllium...
slow neutrons return to the probe after reflecting off of hydrogen nuclei, a neutronprobe may determine the water content in soil. Because neutron radiation...
Neutron scattering, the irregular dispersal of free neutrons by matter, can refer to either the naturally occurring physical process itself or to the man-made...
A neutron star is a collapsed core of a massive supergiant star. The stars that later collapse into neutron stars have a total mass of between 10 and...
exploited as a new means to probe nuclear structure, leading to such discoveries as the creation of new radioactive elements by neutron irradiation (1934) and...
2 mi). A 2.4 m (7.9 ft) long, 2 cm (0.79 in) diameter device, the Lunar NeutronProbe was inserted into one of the holes drilled into the surface to collect...
Neutron detection is the effective detection of neutrons entering a well-positioned detector. There are two key aspects to effective neutron detection:...
molecules by proton nuclear magnetic resonance. The neutron's magnetic moment is exploited to probe the atomic structure of materials using scattering...
doi:10.1007/BF02847186. S2CID 121603277. "DROUGHT_WEB_NEUTRON_PRB" (PDF). "BIBLIOGRAPHY – NEUTRONPROBE" (PDF). Archived from the original (PDF) on 2011-06-28...
can also be detected directly using nuclear quadrupole resonance and neutronprobes. Detection and removal of landmines is a dangerous activity, and personal...
United Kingdom. It uses the techniques of muon spectroscopy and neutron scattering to probe the structure and dynamics of condensed matter on a microscopic...
medium. The configuration is like the neutronprobe where an access tube made of PVC is installed in the soil; probes can also be modular (comb-like) and...
Neutron diffraction or elastic neutron scattering is the application of neutron scattering to the determination of the atomic and/or magnetic structure...
^{1}_{0}n + \gamma}}} The most widespread use of 241AmBe neutron sources is a neutronprobe – a device used to measure the quantity of water present in...
A magnetar is a type of neutron star with an extremely powerful magnetic field (~109 to 1011 T, ~1013 to 1015 G). The magnetic-field decay powers the...
and gypsum blocks. Frequency domain sensor Irrigation in viticulture Neutronprobe Nonlimiting water range Time domain reflectometer BAITSSS Irrigation...
detector. Inelastic neutron scattering observes the change in the energy of the neutron as it scatters from a sample and can be used to probe a wide variety...
A pulsar (from pulsating radio source) is a highly magnetized rotating neutron star that emits beams of electromagnetic radiation out of its magnetic...
The Einstein Probe (EP) is an X-ray space telescope mission by Chinese Academy of Sciences (CAS) in partnership with European Space Agency (ESA) and the...
the atmosphere. A tensiometer, electrical resistance gypsum block, neutronprobes, or time-domain reflectometry (TDR) can be used to determine soil water...
Soil moisture measurement can be based on in situ probes (e.g., capacitance probes, neutronprobes) or remote sensing methods. Water that enters a field...
-> ^{12}_{6}C + ^{1}_{0}n + \gamma}}} The 227AcBe neutron sources can be applied in a neutronprobe – a standard device for measuring the quantity of...
a list of active space probes which have escaped Earth orbit. It includes lunar space probes, but does not include space probes orbiting at the Sun–Earth...
fission in a chain reaction. The rate of the reaction can be controlled with neutron absorbing control rods, so power can be varied with demand or shut off...
Neutron microscopes use neutrons to create images by nuclear fission of lithium-6 using small-angle neutron scattering. Neutrons also have no electric...
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