Towards weighing individual atoms by high-angle scattering of electrons

Autor(en)

Giacomo Argentero, Clemens Mangler, Jani Kotakoski, Franz Eder, Jannik C. Meyer

Abstrakt

We consider theoretically the energy loss of electrons scattered to high angles when assuming that the primary beam can be limited to a single atom. We discuss the possibility of identifying the isotopes of light elements and of extracting information about phonons in this signal. The energy loss is related to the mass of the much heavier nucleus, and is spread out due to atomic vibrations. Importantly, while the width of the broadening is much larger than the energy separation of isotopes, only the shift in the peak positions must be detected if the beam is limited to a single atom. We conclude that the experimental case will be challenging but is not excluded by the physical principles as far as considered here. Moreover, the initial experiments demonstrate that the separation of gold and carbon based on a signal that is related to their mass, rather than their atomic number.

Organisation(en)

Physik Nanostrukturierter Materialien

Journal

Ultramicroscopy

Band

151

Seiten

23–30

Anzahl der Seiten

8

ISSN

0304-3991

Publikationsdatum

12-2014

Peer-reviewed

Ja

ÖFOS 2012

210006 Nanotechnologie, 103008 Experimentalphysik, 103009 Festkörperphysik

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Instrumentation, Atomic and Molecular Physics, and Optics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/814ac4ed-7cc6-4926-8634-0e2b796a30d6