The 'source-detector distance' field | |
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Specifies
the distance of the source from the detector. The distance is measured
from the top surface of the source (or the highest point in case of
convex / concave sources). |
The 'homogeneous source type' button | |
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Selects
the source type to be a homogeneous. This means that the alpha particle
emitters are distributed into a homogeneous matrix of non-active
material. See specifying a homogeneous source. |
The 'radioactive particles source type' button | |
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Selects
the source type to be radioactive particles. This means that the alpha particle
emitters are contained in particles of non-active
material. See specifying radioactive particles source. |
The 'radioactive particles in homogeneous source matrix type' button | |
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Selects
the source type to be radioactive particles embedded in a homogeneous
matrix. This means that the alpha particle
emitters are contained in particles of non-active
material, and in addition the particles are contained in a homogeneous
matrix of non-active material. See specifying radioactive particles in
a homogeneous source matrix. |
Specifying a homogeneous source |
The source diameter | |
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The source is assumed to be cylindrical, and this is the diameter of the cylinder. |
Central thickness | |
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The
thickness of the source at its center. This can be used together with
the side thickness to specify a source that has convex of concave upper
surface (the surface facing the detector) |
Side thickness | |
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The
thickness of the source at its side. This can be used together with
the central thickness to specify a source that has convex of concave upper
surface (the surface facing the detector) |
Thickness fluctuation |
|
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The
maximum thickness fluctuations in the source. The source can have
thickness fluctuations that are uniformly distributed between 0 and
this value. |
Density |
|
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The density of the source material. |
'Source element composition' table |
|
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This
table displays the elemental composition of the source. By clicking on
the white portion of table you will be able to edit the material. See
editing materials with the material editor. |
Specifying radioactive particles source |
'Single particle' button |
|
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Selects
only single particle at specified location to contain the emitter. The
location can be edited with the two fields for x and y - coordinates of
the particle. The origin of the coordinatesystem coincides with
the center of the detector window. Important: This option disables the lognormal size distribution. |
'Many particles' button |
|
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Selects
many particles to be randomly generated to contain the emitters. The
diameter of the area where the particles will be generated can be
specified in the field below. |
'Spherical particle type' button |
|
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Selects spherical shape to be used for the particle(s) simulated. |
'Ellipsoidal particle type' button |
|
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Selects ellipsoidal shape to be used for the particle(s) simulated. Important: This option disables the use of a lognormal size distribution. All particles are considered to have the same size instead. |
'Spherical surface layer type' button |
|
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Selects a layer of radioactive material on the surface of spherical particles to be used in the simulation. |
'All particles have the same size' button |
|
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Selects all particles to have the same size. The size of the particles can be defined in particle properties. |
'Lognormally distributed particle size' button |
|
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Selects
the particles size to be lognormally distributed. The parameters of the
distribution can be specified in particle properties. Important: This option is not available if single particle or ellipsoidal particle type are selected |
Particle diameter | |
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The diameter of the particle(s) to simulate. Only available with spherical particle type. |
Particle X diameter | |
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The diameter of the particle(s) along the X - axis. Only available with ellipsoidal particle type. |
Particle Y diameter | |
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The diameter of the particle(s) along the Y - axis. Only available with ellipsoidal particle type. |
Particle Z diameter | |
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The diameter of the particle(s) along the Z - axis. This is the axis that points towards the detector. Only available with ellipsoidal particle type. |
Mean diameter | |
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The mean diameter of the particle(s). Only available with lognormal size distribution |
Geometric standard deviation | |
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The geometric standard deviation of the particle(s) diameter. Only available with lognormal size distribution |
Diameter ceiling | |
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The maximum diameter of the particle(s). Only available with lognormal size distribution |
Particle density | |
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Density of the particle material. |
'Particle element composition' table | |
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This
table displays the elemental composition of the particles. It is
noteworthy that although elements such as uranium and plutonium can be
specified, the particle material is still considered to be non-active.
By clicking on
the white portion of table you will be able to edit the material. See
editing materials with the material editor. |
Specifying radioactive particles in a homogeneous matrix source |
'Uniform depth distribution' button | |
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Specifies that uniform distribution should be used in distributing the particles into the source matrix. |
'Exponential depth distribution' button | |
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Specifies that exponential distribution should be used in distributing the particles into the source matrix. The parameters of the exponential depth distribution can then be edited in the particle properties. |
Percentage to distribute exponentially | |
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The percentage of the generated particles to be distributed exponentially. The rest are on the surface of the source matrix. |
Mean penetration depth | |
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The mean depth the exponentially distributed particles will penetrate the source matrix. |