Mark A Prelas

University of Missouri Columbia, Electrical and Computer Engineering, Faculty Member

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Professor Electrical Engineering and Computer Science. Fellow of the American Nuclear Society. Fellow of the American Physical Society. Expertise in Nuclear Energy Conversion, Diamond and Related Materials, Nuclear Batteries, Nuclear-Pumped Lasers.

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Anna M. Czarnecka

Polska Akademia NaukI

Mohd Adib Ibrahim

Universiti Kebangsaan Malaysia

Annelise Barron

Stanford University

Maurizio Sansotera

Politecnico di Milano

Forrest Brewer

University of California, Santa Barbara

Eyad M Salem

Imam Abdulrahman bin Faisal University

Nathalie Zahra

University of Leicester

James Bashkin

University of Missouri - St. Louis

Prof Oscar Matzinger

University of Lausanne

Sotirios Xydis

National Technical University of Athens

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Papers by Mark A Prelas

Molybdenum-99 production pathways and the sorbents for 99Mo/99mTc generator systems using (n, γ) 99Mo: a review

SN applied sciences, Oct 7, 2020

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Introduction to Nuclear Batteries and Radioisotopes

Lecture Notes in Energy, 2016

This chapter provides the reader with background and fundamental information on the subject of nu... more This chapter provides the reader with background and fundamental information on the subject of nuclear batteries. The approach used in this chapter is to describe the characteristics of a nuclear battery relying on easy to understand physical properties. For example, a commonly used descriptive parameter is the maximum power density. However, a more intuitive parameter is to use the inverse of maximum power density and define a quantity of minimum volume per Watt for a radioisotope volume source or minimum surface area per Watt for a radioisotope surface source. This approach gives the reader a feel for actual dimensional limitations of the technology as well as other constraints.

Radioisotopes

Lecture notes in energy, 2016

Characterization and Adsorption Behavior of Strontium from Aqueous Solutions onto Chitosan-Fuller’s Earth Beads

Healthcare, Mar 26, 2019

Fuller's earth spherical beads using chitosan as a binder were prepared for the removal of stront... more Fuller's earth spherical beads using chitosan as a binder were prepared for the removal of strontium ions from aqueous solution. The adsorbents were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), which revealed the porous nature of the beads. The Brunauer-Emmett-Teller (BET) surface area of the beads was found to be 48.5 m 2 /g. The adsorption capacities of the beads were evaluated under both batch and dynamic conditions. The adsorption capacity was found to be~29 mg/g of adsorbent at 298 K when the equilibrium concentration of strontium in the solution was 925 mg/L at pH 6.5. The X-ray photoelectron spectroscopy (XPS) data suggest that strontium uptake by the beads occurs mainly through an ion-exchange process. Kinetic data indicate that the sorption of strontium onto the beads follows anomalous diffusion. Thermodynamic data suggest that the ion-exchange of Sr 2+ on the bead surface was feasible, spontaneous and endothermic in nature.

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Comparison of Performances of MCNP and EGSnrc for Modelling the Doses Imparted from Photons and e's to Samples

Transactions of the American Nuclear Society, Nov 1, 2006

ABSTRACT MCNP is well established and highly successful in the modelling of transmissions and dos... more ABSTRACT MCNP is well established and highly successful in the modelling of transmissions and doses of neutrons and hard photons. MCNP is widely accepted for reactor physics and shielding work in the environment of reactors, nuclear batteries, and radioactive fuels. Although MCNP (especially the derivative MCNPX) is adaptable to medical applications and has been pursued by a few medical research groups for implementation, MCNP (i.e. MCNP4a and MCNP4b) was not developed originally for applications in radiology, radiation oncology, or CT.

Nuclear-pumped flashlamp sources

Proceedings of SPIE, 2000

ABSTRACT

Summary of the design principles of betavoltaics and space applications

Elsevier eBooks, 2023

Photochemical Processes in Diamond Chemical Vapor Deposition

APS March Meeting Abstracts, Mar 1, 1996

ABSTRACT

Diamond-Like Carbon Films

Authors

Fusion Technology, 1991

A Review of Nuclear Pumped Lasers and Applications (Asteroid Deflection)

A graduate course focused on bringing cutting edge research into the classroom, titled Nuclear Pu... more A graduate course focused on bringing cutting edge research into the classroom, titled Nuclear Pumped Lasers and applications, was taught at the University of Missouri in 1991 as a topics course; due to renewed interests in high power/high energy lasers for civilian applications, the course has been updated with new research and is being offered in the spring of 2014. Nuclear-Pumped Laser (NPL) technology was a part of the strategic defense initiative (SDI) program in the 1980's. NPLs have since faded from the United States research agenda but they remain an active part of the research agenda in other countries, notably in Russia and other nations in the former Soviet Union as well as China [1] which has a cooperative agreement with Russia [2]. The reason for this broad interest in the technology is that a NPL can scale to high power/energy levels (potentially up to 100 MW Continuous Wave (CW) beam power). Military applications have historically dominated the NPL research agenda. However, there are significant humanitarian applications for high power/energy lasers. For example a high power CW NPL would have the capability to deflect asteroids or comets. Other important applications are in space propulsion, power transmission, and asteroid mining. Despite the promise, there are significant problems in NPL development [3, 4]. High power/high energy gas lasers by their nature require high pumping power densities (defined as the Watts/cm 3 deposited in the laser medium). That is why many of the most powerful gas lasers are pulsed. Nuclear-pumping does not generate high power densities as compared to electrical pumping, but it does generate high energy densities. This limits the type of high power/high energy gas laser systems that can be driven by NPL technologies. Other issues involve the size and scale of NPLs using gas laser technology as well as the design of reactor cores dedicated to the production of laser beams. Several promising approaches were developed including the development of nuclear-driven flashlamps [5] which can increase the effective pumping power density through photon focusing and thus open up new possibilities for both gaseous and solid-state high power/high energy laser systems.

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Compact nuclear-driven semiconductor reactor/laser system

Progress in Nuclear Energy, Nov 1, 2021

Authors

Nuclear Technology - Fusion, 1981

Biological Terrorism: Classiﬁ cation and Manufacture

Storing hydrogen, by enhancing diamond powder properties with CaF2 and KF for use in fuel cells

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Radiation Interaction with Matter

Springer eBooks, 2016

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Introduction to Nuclear-Pumped Lasers

Springer eBooks, 2016

Nuclear-Pumped Lasers are lasers that are “pumped” by the products from nuclear reactions. In Cha... more Nuclear-Pumped Lasers are lasers that are “pumped” by the products from nuclear reactions. In Chap. 1, the reader is introduced to lasers, the important components of a laser, some basic properties of lasers and how those properties can lead to solutions for problems requiring high-energy/high-power lasers. The development and understanding of these fundamentals are essential for the transitioning of the discussions into an understanding of the principles which are critical to nuclear-pumped laser research.

Sporadic neutron production by pressure-loaded D/Ti systems under high rates of temperature change

Surface Effect for Gas Loading Micrograin Palladium for Low Energy Nuclear Reactions LENR

A Research Program Nuclear Energy Conversion

Direct conversion of nuclear energy to electricity has been a challenging problem since the incep... more Direct conversion of nuclear energy to electricity has been a challenging problem since the inception of the generation of electricity from nuclear reactions. The development of wide bandgap, p-n junctions in materials such as diamond, gallium nitride, aluminum nitride, and silicon carbide is at the heart of this research. A p-n junction in materials with band-gaps greater than 3 eV can be used in nuclear energy conversion in multiple ways. For example, for direct conversion of the kinetic energy of particles from the decay of radioisotopes, a diamond p-n junction has some unique advantages. It is less susceptible to radiation damage than SiC, GaN, and AlN because, at high temperatures, it can self-anneal point defects caused by radiation damage. A method which eliminates the radiation damage problem is a Two-Step Photon Intermediate Direct Energy Conversion (PIDEC) method that uses the efficient generation of photons from the interaction of particulate radiation with fluorescer media. The photons are then transported to wide band-gap photovoltaic cells where electrical current is generated. PIDEC holds the promise of 40% energy conversion efficiency in a single cycle. PIDEC can be applied both to large power generation systems and to small scale nuclear batteries based on radioisotopes (Radioisotope Energy Conversion System-RECS). Students and faculty have built a test stand for the PIDEC and RECS concepts which tests the physics of fluorescence production from the interaction of radiation with various fluorescer media, the transport of photons, radiation shielding methods, photovoltaic conversion with wide band-gap photovoltaic cells, and conversion efficiencies. The technology is licensed to a Missouri company (US Semiconductor, Independence MO) and is helping to facilitate economic development in the State of Missouri.

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Molybdenum-99 production pathways and the sorbents for 99Mo/99mTc generator systems using (n, γ) 99Mo: a review

SN applied sciences, Oct 7, 2020

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Introduction to Nuclear Batteries and Radioisotopes

Lecture Notes in Energy, 2016