Name

Unit

Description

Default

T

K

Temperature

394

density

g/cm\(^{3}\)

Material density

6.0

M

amu

ion mass

50.94

sigmaCoh

barns

Coherent scattering cross section

0.0184

sigmaInc

barns

Incoherent scattering cross section

5.08

DOSfn

string

Path to the file that contains the DoS

NULL

nphe_exact

1

Number of terms in the phonon expansion taken exact. Has to be between 1 and 3.

1

nphe_approx

1

Number of terms in the phonon expansion taken approximate.

0

approx

1

Approximation type: 0 gaussian, 1 saddle point

0

mph_resum

0/1

Resumate the remaining terms of the phonon expansion via a saddle point: 0 No, 1 Yes

0

nxs

1

Number of energy points at which the total cross sections are precomputed

1000

kabsmin

A\(^{-1}\)

Lower cut-off for the neutron wave-vector k

0.1

kabsmax

A\(^{-1}\)

Higher cut-off for the neutron wave-vector k

25

interact_fraction

1

How large a part of the scattering events should use this process 0-1 (sum of all processes in material = 1)

-1

init

string

Deprecated and unused. Accepted so that instruments written for McStas/McXtrace 3.8.7 and earlier, which name the Union_init component here, still compile.

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