Sample to moderator volume ratio effects in neutron yield from a PGNAA setup

A. A. Naqvi; Fazal-ur-Rehman; M. M. Nagadi

doi:10.1016/j.radmeas.2006.10.003

Sample to moderator volume ratio effects in neutron yield from a PGNAA setup

A. A. Naqvi^*, Fazal-ur-Rehman, M. M. Nagadi, Khateeb-ur-Rehman

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Performance of a prompt gamma ray neutron activation analysis (PGNAA) setup depends upon thermal neutron yield at the PGNAA sample location. For a moderator, which encloses a sample, thermal neutron intensity depends upon the effective moderator volume excluding the void volume due to sample volume. A rectangular moderator assembly has been designed for the King Fahd University of Petroleum and Minerals (KFUPM) PGNAA setup. The thermal and fast neutron yield has been measured inside the sample cavity as a function of its front moderator thickness using alpha particle tracks density and recoil proton track density inside the CR-39 nuclear track detectors (NTDs). The thermal/fast neutron yield ratio, obtained from the alpha particle tracks density to proton tracks density ratio in the NTDs, shows an inverse correlation with sample to moderator volume ratio. Comparison of the present results with the previously published results of smaller moderators of the KFUPM PGNAA setup confirms the observation.

Original language	English
Pages (from-to)	241-244
Number of pages	4
Journal	Radiation Measurements
Volume	42
Issue number	2
DOIs	https://doi.org/10.1016/j.radmeas.2006.10.003
State	Published - Feb 2007

Bibliographical note

Funding Information:
The authors wish to acknowledge the support of the Physics Department at King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.

Keywords

2.8 MeV neutrons
Fast and thermal neutron yield measurement
Monte Carlo simulations
NTDs
PGNAA

ASJC Scopus subject areas

Radiation
Instrumentation

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10.1016/j.radmeas.2006.10.003

Cite this

@article{08e5f0d8d3674e1a9eeb19c94d666964,

title = "Sample to moderator volume ratio effects in neutron yield from a PGNAA setup",

abstract = "Performance of a prompt gamma ray neutron activation analysis (PGNAA) setup depends upon thermal neutron yield at the PGNAA sample location. For a moderator, which encloses a sample, thermal neutron intensity depends upon the effective moderator volume excluding the void volume due to sample volume. A rectangular moderator assembly has been designed for the King Fahd University of Petroleum and Minerals (KFUPM) PGNAA setup. The thermal and fast neutron yield has been measured inside the sample cavity as a function of its front moderator thickness using alpha particle tracks density and recoil proton track density inside the CR-39 nuclear track detectors (NTDs). The thermal/fast neutron yield ratio, obtained from the alpha particle tracks density to proton tracks density ratio in the NTDs, shows an inverse correlation with sample to moderator volume ratio. Comparison of the present results with the previously published results of smaller moderators of the KFUPM PGNAA setup confirms the observation.",

keywords = "2.8 MeV neutrons, Fast and thermal neutron yield measurement, Monte Carlo simulations, NTDs, PGNAA",

author = "Naqvi, \{A. A.\} and Fazal-ur-Rehman and Nagadi, \{M. M.\} and Khateeb-ur-Rehman",

note = "Funding Information: The authors wish to acknowledge the support of the Physics Department at King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia. ",

year = "2007",

month = feb,

doi = "10.1016/j.radmeas.2006.10.003",

language = "English",

volume = "42",

pages = "241--244",

journal = "Radiation Measurements",

issn = "1350-4487",

publisher = "Elsevier Ltd.",

number = "2",

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T1 - Sample to moderator volume ratio effects in neutron yield from a PGNAA setup

AU - Naqvi, A. A.

AU - Fazal-ur-Rehman,

AU - Nagadi, M. M.

AU - Khateeb-ur-Rehman,

N1 - Funding Information: The authors wish to acknowledge the support of the Physics Department at King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.

PY - 2007/2

Y1 - 2007/2

N2 - Performance of a prompt gamma ray neutron activation analysis (PGNAA) setup depends upon thermal neutron yield at the PGNAA sample location. For a moderator, which encloses a sample, thermal neutron intensity depends upon the effective moderator volume excluding the void volume due to sample volume. A rectangular moderator assembly has been designed for the King Fahd University of Petroleum and Minerals (KFUPM) PGNAA setup. The thermal and fast neutron yield has been measured inside the sample cavity as a function of its front moderator thickness using alpha particle tracks density and recoil proton track density inside the CR-39 nuclear track detectors (NTDs). The thermal/fast neutron yield ratio, obtained from the alpha particle tracks density to proton tracks density ratio in the NTDs, shows an inverse correlation with sample to moderator volume ratio. Comparison of the present results with the previously published results of smaller moderators of the KFUPM PGNAA setup confirms the observation.

AB - Performance of a prompt gamma ray neutron activation analysis (PGNAA) setup depends upon thermal neutron yield at the PGNAA sample location. For a moderator, which encloses a sample, thermal neutron intensity depends upon the effective moderator volume excluding the void volume due to sample volume. A rectangular moderator assembly has been designed for the King Fahd University of Petroleum and Minerals (KFUPM) PGNAA setup. The thermal and fast neutron yield has been measured inside the sample cavity as a function of its front moderator thickness using alpha particle tracks density and recoil proton track density inside the CR-39 nuclear track detectors (NTDs). The thermal/fast neutron yield ratio, obtained from the alpha particle tracks density to proton tracks density ratio in the NTDs, shows an inverse correlation with sample to moderator volume ratio. Comparison of the present results with the previously published results of smaller moderators of the KFUPM PGNAA setup confirms the observation.

KW - 2.8 MeV neutrons

KW - Fast and thermal neutron yield measurement

KW - Monte Carlo simulations

KW - NTDs

KW - PGNAA

UR - https://www.scopus.com/pages/publications/34248573582

U2 - 10.1016/j.radmeas.2006.10.003

DO - 10.1016/j.radmeas.2006.10.003

M3 - Article

AN - SCOPUS:34248573582

SN - 1350-4487

VL - 42

SP - 241

EP - 244

JO - Radiation Measurements

JF - Radiation Measurements

IS - 2

ER -

Sample to moderator volume ratio effects in neutron yield from a PGNAA setup

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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