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2 results on '"Ali, Mohsin Hasan"'

1. Scherrer and Williamson-Hall estimated particle size using XRD analysis for cast aluminum alloys.

Author

Yusuf, Sukaina Iskandar, Mohammad, Sabri Jasim, and Ali, Mohsin Hasan

Subjects
ALUMINUM-zinc alloys, COPPER, X-ray diffraction, ALUMINUM analysis, ALUMINUM castings
Abstract

Aluminum metal matrix composites find applications in several industries, such as aerospace, military, cars, sports equipment, and electronics. The primary objective of this experimental study is to obtain insights into the microstructural properties of an Al-Zn alloy that has been strengthened with copper. This investigation involved the preparation of an alloy including aluminum and zinc, which was afterward reinforced with varying quantities (0%, 0.4%, 1.2%, and 2%) of copper. In addition to conducting XRD tests to investigate the crystallite structure, particle size, and microscopic strain of the samples using the Scherrer and Williamson-Hall models, structural examinations were carried out using the EDS test to ascertain the elemental composition proportions. It was observed that the alloy (A-Zn-0.4%Cu) has smaller particle sizes than the other alloys under consideration. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Measurement the building up factor of Γ-ray in tissue-equivalent material.

Author

Khdaer, Eman Mahmood and Ali, Mohsin Hasan

Subjects
ORGANOSODIUM compounds, ATTENUATION coefficients, GAMMA rays, PARAFFIN wax, SODIUM iodide, IMAGING phantoms
Abstract

The attenuation coefficients and building up factor (BF) of two different specimens of organic compound (paraffin wax) and sodium chloride structures were measured using gamma rays from radioactive sources (124Am, 137Cs, 226Ra) with energies (60, 662, 186, 242, 295, 352, 609, 1120, 1765) keV respectively. These two samples were measured with a gamma ray integrated computer spectrometer (ICS). This system is controlled by a computer using a custom-written programme and is linked to a sodium iodide activated thallium detector that measures just 1.5 inches by 1.5 inches. The radioactive source and detector were placed in the same room as the specimen. There was a 900-second accumulation time. With the (USX PCI) software, we were able to calculate the photopeak, net area, and FWHM of photopeak. Measured data was compared to the ICRU Report 44 value. When an organic compound and sodium chloride are combined, the attenuation coefficients are less than 7% different from what would be expected in human tissue. Results from this study suggest that the materials used for dosimetry could also be used to create tissue phantoms that accurately represent the biological tissues under investigation. [ABSTRACT FROM AUTHOR]

Published
2023
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