MgO single-crystal as an efficient thermal neutron filter

Adib, M.; Habib, Nusrat; Bashter, I.I.; Fathallah, M.; Saleh, Ahmed

doi:10.1016/j.anucene.2011.08.001

Cited by 19 publications

(9 citation statements)

References 16 publications

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“…At liquid nitrogen temperature (77 K), the best transmission rate is achieved with MgO crystal, which showsthat cooled MgO crystals are better than sapphire for the transmission of long wavelength neutrons. The transmission curves for MgO are in agreement with the results found by Adib et al [1].…”

Section: Figsupporting

confidence: 91%

“…Single crystal sapphire (Al 2 O 3 ) is frequently used as fast neutron filter in experiments around research reactors. Several works have also shown that MgO crystal could be a good thermal neutron filter [1,2]. The neutron filter material must have a low cross section for thermal neutrons, with energy less than 0.1 eV, and a high cross section for energies greater than about 1 eV.…”

Section: Introductionmentioning

confidence: 99%

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Study of Sapphire and MgO as Thermal Neutron Filters for The TRIGA Moroccan ReactorBeam ports.

Zahar¹,

Benchekroun²,

Belhorma³

et al. 2016

IJAR

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We focus on the thermal neutrons interaction with sapphire and MgO crystals that are frequently used as thermal neutron filters. The LEAPR module of NJOY code has been used to generate the thermal neutron cross sections for sapphire and MgO crystals at different temperatures. The phonon density-of-states, required by the LEAPR module, has been calculated using the ABINIT package. The generated cross sections allow us to study the temperature effect on the quality of each filter and to compare the filtering powers of the two considered crystals. Geant4 simulations based on the generated thermal cross section give reasonable transmission rates for sapphire filter at room temperature.

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Section: Figsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Study of Sapphire and MgO as Thermal Neutron Filters for The TRIGA Moroccan ReactorBeam ports.

Zahar¹,

Benchekroun²,

Belhorma³

et al. 2016

IJAR

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show abstract

“…In particular, beryllium and magnesium oxides (BeO and MgO) are fundamental materials in nuclear industry and neutron scattering applications (Holmryd and Connor, 1969;Carpenter et al, 1989;Thiyagarajan et al, 1998;Adib et al, 2011Adib et al, , 2014. They are used as thermal neutron monochromators and filters.…”

Section: Introductionmentioning

confidence: 98%

“…This modeling was facilitated by the transmission measurements of thermal neutrons at different temperatures. Thiyagarajan et al (1998), modeled their data using a Debye temperature of 938 K, while the same data were modeled again by Adib et al (2011) and led to a different Debye temperature of 700 K. To date, no thermal neutron scattering library in the ENDF format is available for MgO.…”

Section: Introductionmentioning

confidence: 99%

Thermal neutron scattering cross sections of beryllium and magnesium oxides

Al-Qasir

Jisrawi

Gillette

et al. 2016

Annals of Nuclear Energy

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“…Mono-crystal filters of sapphire (Al 2 O 3 ) at room temperature (R.T.) [5,6] or silicon [7,8] and magnesium oxide [9,10] at cryogenic temperatures, are frequently used.…”

Section: Introductionmentioning

confidence: 99%