If placed in close proximity to an object emitting neutrons, or its container, the foil may be activated sufficiently that radio spectroscopy of resulting activation products in the foil could yield low fidelity information on the nature of the neutron flux.

Only 57 stable nuclides have an odd neutron number, compared to 200 with an even neutron number.

These have included passive gamma ray spectrometry, passive and active neutron coincidence counting and neutron multiplicity measurements.

Thermal neutron reactors are the most common type of nuclear reactor, and light water reactors are the most common type of thermal neutron reactor.

I live in a state of spiritual flux.

Decades later, the new order was still in flux.

In a neutron star the matter is in a state known as neutron degenerate matter, with a more exotic form of degenerate matter, QCD matter, possibly present in the core.

The flux unit or jansky (symbol Jy) is a non SI unit of spectral flux density, or spectral irradiance, equivalent to 10 26 watts per square metre per hertz.

From this one can deduce formula_7, the expected number of collisions of the neutron with nuclei of a given type that is required to reduce the kinetic energy of a neutron from formula_8 to formula_1 formula_10.

But, as the negotiators work, the world s energy landscape is in enormous flux.

The neutron energy distribution is then adopted to the Maxwellian distribution known for thermal motion.

It decays through neutron emission with a half life of (1.39 0.10) 10 22 seconds.

(c) Photo neutron interrogation photo induced neutron emission occurs when the energy of an incoming photon (X ray or gamma ray) is above a certain threshold and atoms of low atomic weight undergo photonuclear reactions that emit neutrons.

In contrast, a free neutron (which also decays through the weak interaction) lives about 15 minutes.

This applies to such techniques as gamma ray spectroscopy, passive gamma imaging and neutron multiplicity analysis.

When purchased new a typical Cf 252 neutron source emits between 1 107 to 1 109 neutrons per second but, with a half life of 2.6 years, this neutron output rate drops to half of this original value in 2.6 years.

Other isotopes are manufactured by neutron irradiation of parent isotopes in a nuclear reactor (for example, Tc 97 can be made by neutron irradiation of Ru 96) or by bombarding parent isotopes with high energy particles from a particle accelerator.

The entire center left is in flux, and new parties will probably come and go.

In conclusion, although significant State practice and doctrine exist, they are inconsistent and in flux.

In the first situation, an approved fissile materials container without external marking, but with a seal, is declared to be loaded with neutron emitting fissile material, and this is moved from a store, through a neutron detecting portal, which registers a positive. Here

Fissures within the Egyptian regime suggest that in Hosni Mubarak s entourage, too, fear is in flux.

The tesla is the SI derived unit of magnetic flux density and was named after Tesla.

It decays through double neutron emission and has a half life of at least 9.1 10 22 seconds.

The flux of moisture from a water surface is eliminated by even a thin skin of ice, whereas the flux of heat through thin ice continues to be substantial until it attains a thickness in excess of 30 to 40 cm.

Cf 252 neutron sources are typically 1 4 to 1 2 in diameter and 1 to 2 in length.

When thorium 232 absorbs a neutron, it becomes thorium 233, which has a half life of only 22 minutes.

In the high energy range, the flux of electrons is only about 1 of that of protons.

Recycling proponents want ultimately to build a fleet of fast neutron reactors that could consume the plutonium and other fissionable material.

Saudi Arabia, long one of the Arab world s most rigid societies, now finds itself in a state of flux.

Aeon Flux suffered a decline of 63.97 in box office earnings, going down to number six the following week.

Meanwhile, the core becomes a stellar remnant a white dwarf, a neutron star, or (if it is sufficiently massive) a black hole.

Today s flux in the Middle East is a highly ambivalent affair, because the situation can improve or (more likely) deteriorate.

Since the downfall of the regime of Saddam Hussein, the relations between the KRG and Turkey have been in flux.

These neutrons change the nucleus of the irradiated material by adding a neutron, or by splitting it in the process of nuclear fission.

As an example, a representative alpha beryllium neutron source can be expected to produce approximately 30 neutrons for every one million alpha particles.

The Arab world is also in a state of flux after an emotional 22 days of Israel s televised bombardment of Gaza.

First and foremost, the concept of permanent membership is contrary to the fundamental reality that the world is in constant flux.

And you make if from lithium. That reaction at the bottom, that's lithium 6, plus a neutron, will give you more helium, plus tritium.

The mean logarithmic reduction of neutron energy per collision , formula_3, depends only on the atomic mass, formula_4, of the nucleus and is given by formula_5.

This compound is used as flux in the smelting of secondary aluminium, to reduce or remove the magnesium content of the melt.

Also, the voltage per turn in any coil is higher because the rate of change of magnetic flux is at high frequencies.

Materials such as deuterium or beryllium used in some nuclear warheads in association with fissile material may be detectable by using the photo neutron technique.

I am sure that all members know what the ancient Greek philosopher Heraclitus said Ta panta rhei Everything in life is in flux .

) Surrounded by a U 238 reflector tamper, the Fat Man's pit was brought close to critical mass by the neutron reflecting properties of the U 238.

One Israeli Knesset member allegedly stated that Israel had dropped neutron bombs containing fissile material in the area along the Golan that separated Israel from Syria.