Ionisation

The plasma temperature is selected to maximise ionisation efficiency for elements with a high first ionisation energy, while minimising second ionisation (double charging) for elements that have a low second ionisation energy.

All ionisation based instruments (including geiger counters and ionisation chambers ) measure exposure.

The sum of the first two ionisation energies for ytterbium are the second lowest in the series and its third ionisation energy is the second highest.

With decreasing energy the wall effect gives way to a combination of wall effect and direct ionisation, until direct gas ionisation dominates.

Another approach to prevent a recurrence, said Harper, would be to inject the water system with chlorine dioxide or use a copper-silver ionisation system.

Beginning in the early 20th century, perhaps with Ionisation by Edgard Varèse which used air-raid sirens (among other things), composers began to require percussionists to invent or "find" objects to produce the desired sounds and textures.

During the day, the D and E layers become much more heavily ionized, as does the F layer, which develops an additional, weaker region of ionisation known as the F 1 layer.

High-voltage, high-energy discharges create thicker discharges with fewer branches, are pale and luminous, almost white, and are much longer than low-energy discharges, because of increased ionisation.

In the older literature, one encounters: *Ionisation isomerism describes the possible isomers arising from the exchange between the outer sphere and inner sphere.

Since the outermost electron of alkali metals always feels the same effective nuclear charge (+1), the only factor which affects the first ionisation energy is the distance from the outermost electron to the nucleus.

Subsequently, the accelerative force on any given ion is controlled by the electrostatic equation, where n is the ionisation state of the ion, and e is the fundamental electric charge.

The high third ionisation energy for Eu and Yb correlate with the half filling 4f 7 and complete filling 4f 14 of the 4f subshell, and the stability afforded by such configurations due to exchange energy.

The most common types of gamma detectors encountered in NAA are the gas ionisation type, scintillation type and the semiconductor type.

The pre-ionisation in some situations can literally short out part of the final EMP, by allowing a conduction current to immediately oppose the Compton current of electrons.) Louis W. Seiler, Jr. A Calculational Model for High Altitude EMP.

The second ionisation energy of all of the alkali metals is very high as it is in a full shell that is also closer to the nucleus; thus, they almost always lose a single electron, forming cations.

The term 'ionosphere', for the region in which the main characteristic is large scale ionisation with considerable mean free paths, appears appropriate as an addition to this series.

This corrugation gives rise to strong electric field gradients in the near-tip zone (on the order of an atomic radii or less from the tip), which during ionisation deflects ions away from the electric field normal.

This ionisation of hydroxyl groups on the surface of soil colloids creates what is described as pH-dependent charges.

This is the result of a combination of two factors: the first ionisation energies and atomisation energies of the alkali metals.

This lowered reactivity is due to the relativistic stabilisation of ununennium's valence electron, increasing ununennium's first ionisation energy and decreasing the metallic and ionic radii ; this effect is already seen for francium.