The Origin of Meteorites

Abstract

The objective of this work is to investigate the density of negative hydrogen ions in high-density, low-temperature recombining hydrogen plasmas. The recombining hydrogen plasmas were obtained in a compact divertor simulator excited by helicon-wave discharges. The electron density and the electron temperature of the recombining plasmas were (1-4) × 10 12 cm −3 and 0.1-0.2 eV, respectively, which were evaluated by comparing the population distribution of the excited states of atomic hydrogen with the Saha-Boltzmann equation. The ratio of the negative ion to electron density ranged between 0 and 0.02 in the recombining plasmas, which was one order of magnitude lower than that observed in a plasma with an electron density on the order of 10 11 cm −3 . The less efficient production of negative hydrogen ions may be attributed to significant dissociation of molecular hydrogen in high-density plasmas.

Effect of boron on the resistivity of compensated 4H-SiC

“…15 It was also presented that the concentration of carbon vacancies increases in samples grown with high growth rates. 16 It was reported that in sublimation growth of SiC with increasing growth rate, the Si/C ratio increases resulting in an increase of the C vacancies. 17 Furthermore, in Ref.…”

Parton densities in a nucleon

“…(26), where xG(x, Q 2 ) is the gluon distribution given by the Glauber formula (9). From (26), xG(x, Q 2 , b t ) can be written as…”

“…On the other hand, σ incl = N σ tot , where N is the average multiplicity and σ tot is the total cross section given by Eq. (9). N is equal to N P omeron N(one P omeron exchange), where N(one P omeron exchange) =…”

The effect of screening on the x and Q2 behaviour of F2 slopes

“…SC in the quark sector, calculated in the Eikonal approximation, were derived some time ago [14] [15] leading to an extensive phenomenology [16]. In our context we have…”