OCT 24, 2019 6:00 AM PDT

Record-making Nuclear Fusion Device to Rescue Dwindling Medical Isotope Supply

(Pixabay)

Neutron generators are a type of nuclear fusion device that can produce a stream of neutrons through merging hydrogen atoms. Because of the intrinsic nature of neutrons — heavy yet electrically neutral — neutron generators enable scientists to examine the inner structure of different materials (such as human bodies or shipping containers) in a non-destructive fashion.  

In a joint announcement, two Wisconsin-based companies, Phoenix LLC and SHINE Medical Technologies, declared that their state-of-the-art neutron generator has recently renewed the world record for nuclear fusion in a controlled environment. Their powerful system is capable of pumping out 46 trillion neutrons per second, exceeding the previous record by 25%.

The concept of a neutron generator was developed in U.K.'s Cavendish Laboratory back in the 1930s. The device accelerates one or more hydrogen isotopes using a linear accelerator and smashes the atoms onto a metal hydride target. The fusion reaction produces helium-3 and neutrons. Using a prototype generator, Australian physicist Mark Oliphant and his team successfully demonstrated nuclear fusion for the first time.

While neutron generators do produce fusion reactions, the number of accelerated ions that cause these reactions is very low. According to the Phenix's account, their technology uses a microwave-powered deuterium ion source and gaseous target, which leads to a significantly improved yield of neutrons as compared to all previous designs.

SHINE is planning to take advantage of this breakthrough to create a safe, cost-effective and environmentally-friendly process to produce medical isotopes such as molybdenum-99 (Mo-99) and its daughter isotope technetium-99m (Tc-99m). 

Manufacturing Molybdenum-99 for medicine at TUM's Research Neutron Source (TUM)

Tc-99m, the most important radioisotope in nuclear medicine, covers over 90% diagnostic imaging procedures worldwide at its peak. It is produced from the decay of Mo-99, a by-product of uranium-235 fission. Traditionally, the manufacturing of Mo-99 was done in a research nuclear reactor. But as many of these reactors reached the end of their life and got shut down permanently, the medical community has been put under crisis mode due to the serious shortage. 

Related reading: Battle of the elements: technetium-99m diagnoses disease then decays away

The system developed by Phoenix can direct the high-energy beam of neutrons into a tank full of aqueous uranium solution. The bombardment of uranium atoms causes them to split into multiple atoms of lighter elements including Mo-99. This method eliminates the need for nuclear reactors for the production process, and the use of low-enriched uranium (LEU) as the target material also complies with the non-proliferation efforts championed by the International Atomic Energy Agency and the federal regulator in the U.S.

Greg Piefer, SHINE’s CEO and founder, commented on the rationals behind developing the neutron generator in the interview with Physics World: “The world-record proves the accelerator technology is suitable to produce medical isotopes at the scale required to support a robust business case. It is also a stepping stone toward advancing fusion for other, more ambitious applications, including the recycling of nuclear waste and ultimately the creation of cleaner, safer and more abundant energy.”

Source: Physics World

About the Author
  • Graduated with a bachelor degree in Pharmaceutical Science and a master degree in neuropharmacology, Daniel is a radiopharmaceutical and radiobiology expert based in Ottawa, Canada. With years of experience in biomedical R&D, Daniel is very into writing. He is constantly fascinated by what's happening in the world of science. He hopes to capture the public's interest and promote scientific literacy with his trending news articles. The recurring topics in his Chemistry & Physics trending news section include alternative energy, material science, theoretical physics, medical imaging, and green chemistry.
You May Also Like
DEC 01, 2019
Space & Astronomy
DEC 01, 2019
Astronomers Are Observing the Birth of a Binary Star System
Stars are easily observable in the night sky, either by the naked eye or with the aid of a powerful telescope, but while we know they exist and we understa...
DEC 22, 2019
Space & Astronomy
DEC 22, 2019
How Astronomers Measure Distances to Stars
Extra stellar systems are so far away from our own that we couldn’t even hope of developing a tape measure long enough to determine how far away they...
JAN 02, 2020
Chemistry & Physics
JAN 02, 2020
Mushroom Chemistry: Pick Your Poison, or Not
Consuming wild mushrooms is largely frowned upon because it can lead to food poisoning. Its consequence ranges from vomiting and diarrhea to death within d...
JAN 20, 2020
Microbiology
JAN 20, 2020
Microbes Create a More Sustainable Building Material
Concrete is the second most widely consumed resource on the planet (after water), and it has a massive carbon footprint....
MAR 16, 2020
Space & Astronomy
MAR 16, 2020
What Would it Take to Visit Alpha Centauri?
Humankind has long pondered upon the ambition of becoming a multiplanetary species. While much of our realistic focus resides right here in our own solar s...
MAR 19, 2020
Chemistry & Physics
MAR 19, 2020
The "Android" Approach to Nuclear Power
Nuclear power plants, whether you like them or not, produce a significant portion of the carbon-free electricity at the moment worldwide. With a wave of hi...
Loading Comments...