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CorrectKiKf v1

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Summary

Performs k_i/k_f multiplication, in order to transform differential scattering cross section into dynamic structure factor.

Properties

Name

Direction

Type

Default

Description

InputWorkspace

Input

MatrixWorkspace

Mandatory

Name of the input workspace

OutputWorkspace

Output

MatrixWorkspace

Mandatory

Name of the output workspace, can be the same as the input

EMode

Input

string

Direct

The energy mode (default: Direct). Allowed values: [‘Direct’, ‘Indirect’]

EFixed

Input

number

Optional

Value of fixed energy in meV : EI (EMode=Direct) or EF (EMode=Indirect) .

Description

Performs ki / kf multiplication, in order to transform differential scattering cross section into dynamic structure factor. Both Ei and Ef must be positive. However, if this requirement is not met, it will give an error only if the data is not 0. This allows applying the algorithms to rebinned data, where one can rebin in Direct EMode to energies higher than EFixed. If no value is defined for EFixed, the algorithm will try to find Ei in the workspace properties for direct geometry spectrometry, or in the instrument definition, for indirect geometry spectrometry. Algorithm is event aware. TOF events will be changed to weighted events.

Usage

Example

ws = CreateSampleWorkspace()
ws = ConvertUnits(ws,"DeltaE",EMode="Direct", EFixed=7.5)

wsOut = CorrectKiKf(ws, EMode="Direct", EFixed=7.5)

print("First five bins:")
print("index  orig  corrected")
for i in range(5):
    print("  %i    %.2f  %.2f" %
        (i,ws.readY(0)[i],wsOut.readY(0)[i]))

Output:

First five bins:
index  orig  corrected
  0    0.30  0.01
  1    0.30  0.02
  2    0.30  0.04
  3    0.30  0.05
  4    0.30  0.07

Categories: AlgorithmIndex | Inelastic\Corrections | CorrectionFunctions\SpecialCorrections

Source

C++ header: CorrectKiKf.h

C++ source: CorrectKiKf.cpp