incident neutron

The average energy released and number of neutrons ejected is a function of the incident neutron speed.

Due to the penetrating nature of incident neutrons and resultant gamma rays the technique provides a true bulk analysis.

In the radiation detection application, raw CR-39 material is exposed to proton recoils caused by incident neutrons.

The probability of further fission events is determined by the fission cross section, which is dependent upon the speed (energy) of the incident neutrons.

Since the incident neutron beam is refracted by each of the layers the wavevector, k, in layer n, is given by:

In nuclear and particle physics, the concept of a neutron cross section is used to express the likelihood of interaction between an incident neutron and a target nucleus.

The enlarged ion tracks are counted under a microscope (commonly 200x), and the number of ion tracks is proportional to the amount of incident neutron radiation.

The likelihood of interaction between an incident neutron and a target nuclide, independent of the type of reaction, is expressed with the help of the total cross section σ.

At a spallation source the time of flight technique is used to sort the energies of the incident neutrons, so no monochromator is needed, just a bunch of electronics.

After irradiating the sample with neutrons, the measured number of emitted gamma rays of energy characteristic to the nucleus of interest is directly proportional to the number of such nuclei along the incident neutron beam trajectory.

As the neutron optical potential of most materials is below 300 neV, the kinetic energy of incident neutrons must not be higher than this value to be reflected under any angle of incidence, especially for normal incidence.

For example, the probability that an interaction of a given kind will take place between a nucleus and an incident neutron is measured by an effective cross-sectional area also called cross section, i.e., in square centimeter which makes not much sense.

And as protons have essentially the same mass as neutrons the range of the proton trail and its direction with respect to the incident neutron beam accurately determines the energy of the incident neutron.

The sum of the rest masses of the fission fragments and ejected neutrons is less than the sum of the rest masses of the original atom and incident neutron (of course the fission fragments are not at rest).

This dilutes the protactinium to such an extent that few protactinium atoms absorb a second neutron or, via a (n, 2n) reaction (in which an incident neutron is not absorbed but instead knocks a neutron out of the nucleus), generate uranium-232.