Publication

Mass-selected deposition of Ag 7 on Pd(100). Evidence for implantation and strong fragmentation

Wolfgang Harbich, René Monot
1994
Journal Articles

Abstract

We present a new experiment which is able to monitor mass-selected cluster depositions in red time using specular reflected thermal helium scattering. Ag/sub 7//sup +/ with an incident energy of 2.86 and of 13.6 eV/atom is deposited on Pd(100) at different surface temperatures. The measurement technique relies on the large atomic cross sections Sigma of adsorbates for diffuse helium scattering. An analysis of Sigma shows that heptamers become fragmented upon impact for both energies and that some of the cluster atoms are implanted into the surface layer.

Official source

https://infoscience.epfl.ch/entities/publication/a7fb43ce-3002-4752-bfce-2467eaffcbbf

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Wolfgang Harbich, René Monot
1994
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/a7fb43ce-3002-4752-bfce-2467eaffcbbf

About this result

Related concepts (22)

Helium

Helium (from helios) is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas and the first in the noble gas group in the periodic table. Its boiling point is the lowest among all the elements, and it does not have a melting point at standard pressure. It is the second-lightest and second most abundant element in the observable universe, after hydrogen. It is present at about 24% of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined.

Atom

An atom is a particle that consists of a nucleus of protons and neutrons surrounded by a cloud of electrons. The atom is the basic particle of the chemical elements, and the chemical elements are distinguished from each other by the number of protons that are in their atoms. For example, any atom that contains 11 protons is sodium, and any atom that contains 29 protons is copper. The number of neutrons defines the isotope of the element. Atoms are extremely small, typically around 100 picometers across.

Alpha particle

Alpha particles, also called alpha rays or alpha radiation, consist of two protons and two neutrons bound together into a particle identical to a helium-4 nucleus. They are generally produced in the process of alpha decay, but may also be produced in other ways. Alpha particles are named after the first letter in the Greek alphabet, α. The symbol for the alpha particle is α or α2+. Because they are identical to helium nuclei, they are also sometimes written as He2+ or 42He2+ indicating a helium ion with a +2 charge (missing its two electrons).

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