  A new Monte Carlo-Library Least Squares (MCLLS) method was developed for the
neutron inelastic-scattering and thermal-capture analysis (NITA) technique in
real-time online analysis systems to determine boron content in Tinkal ore
samples. The Geant4 toolkit was used to simulate the Prompt Gamma-ray Neutron
Activation Analysis (PGNAA) system for the NITA technique. Tinkal ore samples
were bombarded with 14 MeV neutron beams in order to represent neutrons emitted
from the Deuterium-Tritium (DT) neutron generator. After the simulation of
shooting Tinkal ore samples with 14 MeV neutron beams was completed, histograms
were obtained from the Geant4 simulation toolkit. Once the histograms are
broadened according to the shape calibration of the BGO scintillation detector,
the spectrum (broadened histograms) are ready to be used in the MCLLS process.
A single element library was created by broadened histograms of the nine Tinkal
ore samples. In addition, set #10 was selected to be an unknown sample and was
used for validating MCLLS. After analysing the unknown sample spectrum, boron
content was estimated by the single element library created by the MCLLS
method. The estimated value of the boron content by MCLLS was consistent with
the laboratory result.
