Table 4 The experimental values of the NMD widths and excess kurtosis of protons, carbon, and nitrogen nuclei for the powder sample of melamine of mass M = 2.298 g contrasted with the ab initio predictions from the HLD simulations, both obtained from the multivariate Gaussian model of the nuclear momentum distribution.

From: Non-invasive detection of hazardous materials with a thermal-to-epithermal neutron station: a feasibility study towards practical application

Nucleus

HLD prediction

multivariate Gaussian fit

Isotropic Gaussian fit

 

\(\sigma _x\)

\(\sigma _y\)

\(\sigma _z\)

c\(_4\)

\(\sigma _x\)

\(\sigma _y\)

\(\sigma _z\)

c\(_4\)

\(\sigma \)

H

3.98

6.03

5.01

0.044

3.8 ± 0.2

6.1 ± 0.2

4.7 ± 0.6

0.059 ± 0.011

—

C

12.0

14.3

14.1

0.009

–

–

–

 

9.2 ± 1.8

N

11.3

13.9

13.6

0.013

–

–

–

 

12.7 ± 1.2

  1. All values of NMD widths in units of Å\(^{-1}\). The values of the excess kurtosis, c\(_4\), are dimensionless.
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