Neutron flux determination in irradiation sites of an Am-Be neutron source at NNRI

E. Mensimah; R. G. Abrefah; B. J.B. Nyarko; J. J. Fletcher; M. Asamoah

doi:10.1016/j.anucene.2011.06.012

Neutron flux determination in irradiation sites of an Am-Be neutron source at NNRI

E. Mensimah, R. G. Abrefah, B. J.B. Nyarko, J. J. Fletcher, M. Asamoah

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

7 Citations (Scopus)

Abstract

Neutron flux measurements and flux distribution parameters for two irradiation sites of an Am-Be neutron source irradiator were measured by using gold (Au), zirconium (Zr) and aluminum (Al) foils. thermal neutron flux Φ_th = 1.46 × 10⁴ n cm^-2 s ^-1 ± 0.01 × 10², epithermal neutron flux Φ_epi = 7.23 × 10² n cm^-2 s ^-1 ± 0.001, fast neutron flux Φ_f = 1.26 × 10² n cm^-2 s^-1 ± 0.020, thermal-to-epithermal flux ratio f = 20.5 ± 0.36 and epithermal neutron shaping factor α = -0.239 ± 0.003 were found for irradiation Site-1; while the thermal neutron flux Φ_th = 4.45 × 10 ³ n cm^-2 s^-1 ± 0.06, the epithermal neutron Φ_epi = 1.50 × 10² n cm^-2 s¹ ± 0.003, the fast neutron flux Φ_f = 1.17 × 10 n cm^-2 s^-1 ± 0.011, thermal-to- epithermal flux ratio f = 29.6 ± 0.94, and epithermal neutron shaping factor α = 0.134 ± 0.001 were found for irradiation Site-2. It was concluded that the Am-Be neutron source can be used for neutron activation analysis (NAA). The Am-Be source can be used for neutron activation analysis thereby reducing the burden on GHARR-1 and increasing the research output of the nation.

Original language	English
Pages (from-to)	2303-2308
Number of pages	6
Journal	Annals of Nuclear Energy
Volume	38
Issue number	10
DOIs	https://doi.org/10.1016/j.anucene.2011.06.012
Publication status	Published - Oct 2011
Externally published	Yes

Keywords

Am-Be neutron source
Instrumental neutron activation analysis
Neutron flux
Neutron shaping factor
Prompt gamma activation analysis
Thermal-epithermal flux ratio

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10.1016/j.anucene.2011.06.012

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@article{82adef46fb1749b08125b5eac73aeb51,

title = "Neutron flux determination in irradiation sites of an Am-Be neutron source at NNRI",

abstract = "Neutron flux measurements and flux distribution parameters for two irradiation sites of an Am-Be neutron source irradiator were measured by using gold (Au), zirconium (Zr) and aluminum (Al) foils. thermal neutron flux Φth = 1.46 × 104 n cm-2 s -1 ± 0.01 × 102, epithermal neutron flux Φepi = 7.23 × 102 n cm-2 s -1 ± 0.001, fast neutron flux Φf = 1.26 × 102 n cm-2 s-1 ± 0.020, thermal-to-epithermal flux ratio f = 20.5 ± 0.36 and epithermal neutron shaping factor α = -0.239 ± 0.003 were found for irradiation Site-1; while the thermal neutron flux Φth = 4.45 × 10 3 n cm-2 s-1 ± 0.06, the epithermal neutron Φepi = 1.50 × 102 n cm-2 s1 ± 0.003, the fast neutron flux Φf = 1.17 × 10 n cm-2 s-1 ± 0.011, thermal-to- epithermal flux ratio f = 29.6 ± 0.94, and epithermal neutron shaping factor α = 0.134 ± 0.001 were found for irradiation Site-2. It was concluded that the Am-Be neutron source can be used for neutron activation analysis (NAA). The Am-Be source can be used for neutron activation analysis thereby reducing the burden on GHARR-1 and increasing the research output of the nation.",

keywords = "Am-Be neutron source, Instrumental neutron activation analysis, Neutron flux, Neutron shaping factor, Prompt gamma activation analysis, Thermal-epithermal flux ratio",

author = "E. Mensimah and Abrefah, {R. G.} and Nyarko, {B. J.B.} and Fletcher, {J. J.} and M. Asamoah",

year = "2011",

month = oct,

doi = "10.1016/j.anucene.2011.06.012",

language = "English",

volume = "38",

pages = "2303--2308",

journal = "Annals of Nuclear Energy",

issn = "0306-4549",

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TY - JOUR

T1 - Neutron flux determination in irradiation sites of an Am-Be neutron source at NNRI

AU - Mensimah, E.

AU - Abrefah, R. G.

AU - Nyarko, B. J.B.

AU - Fletcher, J. J.

AU - Asamoah, M.

PY - 2011/10

Y1 - 2011/10

N2 - Neutron flux measurements and flux distribution parameters for two irradiation sites of an Am-Be neutron source irradiator were measured by using gold (Au), zirconium (Zr) and aluminum (Al) foils. thermal neutron flux Φth = 1.46 × 104 n cm-2 s -1 ± 0.01 × 102, epithermal neutron flux Φepi = 7.23 × 102 n cm-2 s -1 ± 0.001, fast neutron flux Φf = 1.26 × 102 n cm-2 s-1 ± 0.020, thermal-to-epithermal flux ratio f = 20.5 ± 0.36 and epithermal neutron shaping factor α = -0.239 ± 0.003 were found for irradiation Site-1; while the thermal neutron flux Φth = 4.45 × 10 3 n cm-2 s-1 ± 0.06, the epithermal neutron Φepi = 1.50 × 102 n cm-2 s1 ± 0.003, the fast neutron flux Φf = 1.17 × 10 n cm-2 s-1 ± 0.011, thermal-to- epithermal flux ratio f = 29.6 ± 0.94, and epithermal neutron shaping factor α = 0.134 ± 0.001 were found for irradiation Site-2. It was concluded that the Am-Be neutron source can be used for neutron activation analysis (NAA). The Am-Be source can be used for neutron activation analysis thereby reducing the burden on GHARR-1 and increasing the research output of the nation.

AB - Neutron flux measurements and flux distribution parameters for two irradiation sites of an Am-Be neutron source irradiator were measured by using gold (Au), zirconium (Zr) and aluminum (Al) foils. thermal neutron flux Φth = 1.46 × 104 n cm-2 s -1 ± 0.01 × 102, epithermal neutron flux Φepi = 7.23 × 102 n cm-2 s -1 ± 0.001, fast neutron flux Φf = 1.26 × 102 n cm-2 s-1 ± 0.020, thermal-to-epithermal flux ratio f = 20.5 ± 0.36 and epithermal neutron shaping factor α = -0.239 ± 0.003 were found for irradiation Site-1; while the thermal neutron flux Φth = 4.45 × 10 3 n cm-2 s-1 ± 0.06, the epithermal neutron Φepi = 1.50 × 102 n cm-2 s1 ± 0.003, the fast neutron flux Φf = 1.17 × 10 n cm-2 s-1 ± 0.011, thermal-to- epithermal flux ratio f = 29.6 ± 0.94, and epithermal neutron shaping factor α = 0.134 ± 0.001 were found for irradiation Site-2. It was concluded that the Am-Be neutron source can be used for neutron activation analysis (NAA). The Am-Be source can be used for neutron activation analysis thereby reducing the burden on GHARR-1 and increasing the research output of the nation.

KW - Am-Be neutron source

KW - Instrumental neutron activation analysis

KW - Neutron flux

KW - Neutron shaping factor

KW - Prompt gamma activation analysis

KW - Thermal-epithermal flux ratio

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U2 - 10.1016/j.anucene.2011.06.012

DO - 10.1016/j.anucene.2011.06.012

M3 - Article

AN - SCOPUS:80051795417

SN - 0306-4549

VL - 38

SP - 2303

EP - 2308

JO - Annals of Nuclear Energy

JF - Annals of Nuclear Energy

IS - 10

ER -

Neutron flux determination in irradiation sites of an Am-Be neutron source at NNRI

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Keywords

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