Backscattering
In this issue we have moved from #101 (closed) following terms:
-
backscattering -
forwardscattering -
electron backscattering -
electron forwardscattering -
electron backscatter diffraction -
electron backscatter diffraction pattern
current status:
labels:
label_en: backscattering
singular:
singular_en: backscattering
iri: https://purls.helmholtz-metadaten.de/EMG/000000xx
definitions:
definition_en: >
A physical phenomenon which results in scattered particles that (1) travel on a
trajectory at an angle up to + 90 or -90 degrees relative to the direction of
the incident beam and (2) on the side of the sample where the incident beam arrives.
comments:
comment_en: >
Here we decided to differentiate backscattering and forwardscattering purely based
on the particle trajectory angle relative to the incident beam. We are aware that,
in some instances, particles that fall under the here established definitions for
backscattering AS WELL AS forwardscattering, might be referred as backscattered.
Similarly EBSD detectors might be positioned relative to an incident beam at angles
where mostly forwardscattered particles can be detected - even though it is still
referred to as EBSD.
The decision to differentiate those terms allows for a more precise and fine granular
description of the concepts related to scattering.
Also we define the phenomenon in terms of the outcome as the process on and within the
sample is non trivial and consists of a heterogeneous set of phenomena.
sources:
- Reimer pg 135 (this needs be elaborated)
labels:
label_en: electron backscattering
singular:
singular_en: electon backscattering
iri: https://purls.helmholtz-metadaten.de/EMG/000000xx
definitions:
definition_en: >
A physical phenomenon which results in scattered electrons that (1) travel on a
trajectory at an angle up to + 90 or -90 degrees relative to the direction of
the incident beam and (2) on the side of the sample where the incident beam arrives.
labels:
label_en: forwardscattering
singular:
singular_en: forwardscattering
iri: https://purls.helmholtz-metadaten.de/EMG/000000xx
definitions:
definition_en: >
A physical phenomenon which results in scattered particles that (1) travel on a
trajectory at an angle above + 90 or below -90 degrees relative to the direction of
the incident beam and (2) on the side of the sample where the incident beam arrives.
comments:
comment_en: >
Here we decided to differentiate backscattering and forwardscattering purely based
on the particle trajectory angle relative to the incident beam. We are aware that,
in some instances, particles that fall under the here established definitions for
backscattering AS WELL AS forwardscattering, might be referred as backscattered.
Similarly EBSD detectors might be positioned relative to an incident beam at angles
where mostly forwardscattered particles can be detected - even though it is still
referred to as EBSD.
The decision to differentiate those terms allows for a more precise and fine granular
description of the concepts related to scattering.
Also we define the phenomenon in terms of the outcome as the process on and within the
sample is non trivial and consists of a heterogeneous set of phenomena.
sources:
- Reimer pg 135 (this needs be elaborated)
labels:
label_en: electron forwardscattering
singular:
singular_en: electon forwardscattering
iri: https://purls.helmholtz-metadaten.de/EMG/000000xx
definitions:
definition_en: >
A physical phenomenon which results in scattered electrons that (1) travel on a
trajectory at an angle above + 90 or below -90 degrees relative to the direction of
the incident beam and (2) on the side of the sample where the incident beam arrives.
label: electron backscatter diffraction
acronym: EBSD
definition: >
Electron diffraction which primarily involves backscattered electrons from a solid sample
comments:
comment_en: >
EBSD is primarily used in SEM. EBSD should not be confused with electron channeling contrast
imaging (ECCI) - they are two different techniques. EBSD is incoherent in, and coherent out.
ECCI is coherent in, and never comes out. Electrons scattered by less than 90 degrees are also
included in the EBSD signal; however this is not the primary mechanism.
sources:
- https://en.wikipedia.org/wiki/Electron_backscatter_diffraction
label: electron backscatter diffraction pattern
acronym: EBSP
related_synonym: kikuchi pattern
definition: >
A diffraction pattern which is generated by electron backscatter diffraction.