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[68532f3] | 1 | .. _gaussian-peak: |
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| 2 | |
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| 3 | Gaussian peak |
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| 4 | ======================================================= |
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| 5 | |
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| 6 | Gaussian shaped peak |
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| 7 | |
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| 8 | ========== =============================== ======== ============= |
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| 9 | Parameter Description Units Default value |
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| 10 | ========== =============================== ======== ============= |
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| 11 | scale Source intensity None 1 |
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| 12 | background Source background |cm^-1| 0 |
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| 13 | q0 Peak position |Ang^-1| 0.05 |
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| 14 | sigma Peak width (standard deviation) |Ang^-1| 0.005 |
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| 15 | ========== =============================== ======== ============= |
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| 16 | |
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| 17 | The returned value is scaled to units of |cm^-1|. |
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| 18 | |
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| 19 | |
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| 20 | This model describes a Gaussian shaped peak on a flat background |
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| 21 | |
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| 22 | .. image:: img/image198.PNG |
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| 23 | |
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| 24 | with the peak having height of *I0* centered at *q0* and having a standard deviation of *B*. The FWHM (full-width |
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| 25 | half-maximum) is 2.354 B. |
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| 26 | |
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| 27 | For 2D data: The 2D scattering intensity is calculated in the same way as 1D, where the *q* vector is defined as |
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| 28 | |
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| 29 | .. image:: img/image040.gif |
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| 30 | |
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| 31 | .. image:: img/image199.jpg |
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| 32 | |
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| 33 | *Figure. 1D plot using the default values (w/500 data points).* |
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| 34 | |
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| 35 | REFERENCE |
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| 36 | --------- |
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| 37 | |
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| 38 | None. |
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| 39 | |
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