A Rafi M Iasir,

A Rafi M Iasir,

University of Missouri

H-index: 5

North America-United States

About A Rafi M Iasir,

A Rafi M Iasir,, With an exceptional h-index of 5 and a recent h-index of 5 (since 2020), a distinguished researcher at University of Missouri, specializes in the field of Material Science, Nuclear Material, Nuclear Engineering.

His recent articles reflect a diverse array of research interests and contributions to the field:

Helium impurities and interactions in lithium

Xenon mobility in γ-uranium and uranium–molybdenum alloys

Influence of inert gases on heat and mass transfer in next-generation nuclear reactors

Electronic and magnetic properties of perovskite selenite and tellurite compounds: CoSeO3, NiSeO3, CoTeO3, and NiTeO

Pseudopotential for plane-wave density functional theory studies of metallic uranium

A Rafi M Iasir, Information

University

University of Missouri

Position

___

Citations(all)

64

Citations(since 2020)

63

Cited By

19

hIndex(all)

5

hIndex(since 2020)

5

i10Index(all)

4

i10Index(since 2020)

4

Email

University Profile Page

University of Missouri

A Rafi M Iasir, Skills & Research Interests

Material Science

Nuclear Material

Nuclear Engineering

Top articles of A Rafi M Iasir,

Helium impurities and interactions in lithium

Authors

A Rafi M Iasir,Karl D Hammond

Journal

Computational Materials Science

Published Date

2022/3/1

We investigate helium interactions with lithium using density functional theory. Like other body-centered cubic (bcc) metals, the lowest-energy site for interstitial helium is a tetrahedral site. However, helium in lithium shows a higher substitutional formation energy than either the tetrahedral or octahedral interstitial formation energies, which is unique. The calculated migration energies of helium in lithium are also very low (∼ 1 meV), an order of magnitude lower than those in other bcc metals. We find an increase in the binding energy to a vacancy as the number of helium atoms bound to it increases. The extremely low migration energies suggest that helium transport in lithium will be very fast.

Xenon mobility in γ-uranium and uranium–molybdenum alloys

Authors

A Rafi M Iasir,Karl D Hammond

Journal

Journal of Applied Physics

Published Date

2022/1

Diffusion in bcc uranium and U–Mo alloys is of great interest because fission gas and other fission products impact the performance of nuclear fuels. We investigate the mobility of xenon and molybdenum in bcc uranium (⁠ γ-U) and metallic U–Mo alloys by calculating the migration energies of xenon and molybdenum for various local compositions using density functional theory. We also calculate the solute–vacancy binding energies of different solutes to vacancies in bcc uranium. We find that the solute–vacancy binding energy in bcc uranium is significantly higher than it is in other bcc metals (eg, Fe and W). We also find that the migration energy of molybdenum is substantially higher than the migration energy of xenon, indicating that xenon is much more mobile than molybdenum in bcc uranium. The presence of molybdenum in the nearest-neighbor shell around a xenon atom typically increases the migration …

Influence of inert gases on heat and mass transfer in next-generation nuclear reactors

Authors

Abu Rafi Mohammad Iasir

Published Date

2021

Inert gases cause some unique challenges in nuclear fuel development. In this dissertation, we study the impact of inert gases on the transport behavior in next generation fission and fusion reactors. Uranium–molybdenum alloys are potential nuclear fuels that can replace highly-enriched uranium fuel in research and test reactors around the world. Developing a uranium fuel with low enrichment is an important step towards preventing nuclear proliferation and promoting the peaceful use of nuclear energy. We look into how fission gas (ie, krypton and xenon) impacts the transport properties of U–Mo alloys. We start with an analysis of the impact of fission gas on the overall thermal conductivity of U–Mo. We find that the presence of fission gas inside the fuel significantly reduces the overall thermal conductivity. We then discuss the electronic structure of uranium using density functional theory (DFT) and introduce a …

Electronic and magnetic properties of perovskite selenite and tellurite compounds: CoSeO3, NiSeO3, CoTeO3, and NiTeO

Authors

A Rafi M Iasir,Todd Lombardi,Qiangsheng Lu,Amir M Mofrad,Mitchel Vaninger,David J Zhang,Xiaoqian and Singh

Journal

PHYSICAL REVIEW B

Published Date

2020/1/9

Selenium and tellurium are among the few elements that form A B O 3 perovskite structures with a four valent ion in the A site. This leads to highly distorted structures and unusual magnetic behavior. Here we investigate the Co and Ni selenite and tellurite compounds, CoSeO 3, CoTeO 3, NiSeO 3, and NiTeO 3, using first principles calculations. We find an interplay of crystal field and Jahn-Teller distortions that underpin the electronic and magnetic properties. While all compounds are predicted to show an insulating G-type antiferromagnetic ground state, there is a considerable difference in the anisotropy of the exchange interactions between the Ni and Co compounds. This is related to the Jahn-Teller distortion. Finally, we observe that these four compounds show characteristics generally associated with Mott insulators, even when described at the level of standard density functional theory. These are then dense …

Pseudopotential for plane-wave density functional theory studies of metallic uranium

Authors

A Rafi M Iasir,Karl D Hammond

Journal

Computational Materials Science

Published Date

2020/1/1

We present a pseudopotential for electronic structure calculations of uranium that has been checked against the properties of four crystal structures: α-uranium (base-centered orthorhombic), γ-uranium (body-centered cubic), bct (body-centered tetragonal, an approximation to β-uranium), and fcc (face-centered cubic). The calculations are performed using density functional theory and the projector augmented wave technique using the Perdew–Burke–Ernzerhof (PBE) exchange–correlation functional. The equilibrium lattice parameters, elastic moduli, and electronic density of states are calculated and compared with experiments and with previously-published pseudopotentials. The lattice parameters and elastic moduli as predicted by this pseudopotential are generally either comparable to or show better agreement with experiments than existing pseudopotentials.

See List of Professors in A Rafi M Iasir, University(University of Missouri)

A Rafi M Iasir, FAQs

What is A Rafi M Iasir,'s h-index at University of Missouri?

The h-index of A Rafi M Iasir, has been 5 since 2020 and 5 in total.

What are A Rafi M Iasir,'s top articles?

The articles with the titles of

Helium impurities and interactions in lithium

Xenon mobility in γ-uranium and uranium–molybdenum alloys

Influence of inert gases on heat and mass transfer in next-generation nuclear reactors

Electronic and magnetic properties of perovskite selenite and tellurite compounds: CoSeO3, NiSeO3, CoTeO3, and NiTeO

Pseudopotential for plane-wave density functional theory studies of metallic uranium

are the top articles of A Rafi M Iasir, at University of Missouri.

What are A Rafi M Iasir,'s research interests?

The research interests of A Rafi M Iasir, are: Material Science, Nuclear Material, Nuclear Engineering

What is A Rafi M Iasir,'s total number of citations?

A Rafi M Iasir, has 64 citations in total.

What are the co-authors of A Rafi M Iasir,?

The co-authors of A Rafi M Iasir, are David J. Singh, Nickie J. Peters, Amir Mehdi Mofrad.

    Co-Authors

    H-index: 106
    David J. Singh

    David J. Singh

    University of Missouri

    H-index: 7
    Nickie J. Peters

    Nickie J. Peters

    University of Missouri

    H-index: 7
    Amir Mehdi Mofrad

    Amir Mehdi Mofrad

    University of South Carolina

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