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An elementary theory is developed for the process by which a helium ion or a 2 S 3 metastable helium atom may extract an electron from a metal surface. The helium ion after collision may become a neutral atom although sometimes an excited or even a metastable atom. In the case of the metastable...
In the presence of foreign gases, a narrow and structureless absorption maximum was observed on the short wave-length side of certain members of the principal series of alkali metals. A résumé of the results obtained so far is given. It is suggested that the band is due to the increase in the...
To determine the amount of sputtering in a glow discharge three functions must be known: the number of ions of a given energy striking the cathode, the amount of cathode material released from the cathode by each ion, and the fraction of material released from the cathode which diffuses away....
A discussion is given of the different possibilities which would lead to the assumption of the presence of mesotrons in extensive atmospheric showers, or the so-called Auger showers. The difficulties involved in the problem of the experimental evidence for the existence of these mesotrons are...
It was found in the preceding paper that mesotrons are associated with particles present at several meters distance from the mesotron trajectories. At least part of these particles are collision electrons ejected by these mesotrons along their path in the air. The theoretical results obtained in...
The solution of both the scalar and vector wave equations in regions which are bounded by irregular surfaces which have non-uniform physical properties has been reduced to the solution of a secular equation. The secular determinant is Hermitian. The solution to the secular equation has been...
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