'Doubly magic' form of oxygen may challenge a fundamental law of physics

Protons, made of three quarks, colliding
Protons, made of three quarks, colliding. The quarks are held together by the nuclear strong force carried by gluons (Image credit: MARK GARLICK/SCIENCE PHOTO LIBRARY via Getty Images)

For the first time, scientists have created oxygen-28, a rare oxygen isotope that has 12 more neutrons than oxygen-16, the most common form of oxygen on the planet. This newly created "heavy" oxygen isotope has the highest number of neutrons ever seen in an oxygen atom and was expected to be ultrastable and last virtually forever. 

Instead, however, it degraded incredibly quickly — a finding that challenges our understanding of the strong force, which binds the fundamental particles of matter, such as protons and neutrons, to form larger particles in an atom's nucleus. 

"It opens a very, very big fundamental question about nature's strongest interaction, the nuclear strong force," Rituparna Kanungo, a physicist at Saint Mary's University in Canada who was not involved with the experiment, told New Scientist

Related: Quantum 'yin-yang' shows two photons being entangled in real time

To create oxygen-28, a team led by researchers at the Tokyo Institute of Technology blasted a beam of fluorine-29 — an isotope that has nine protons — at a liquid-hydrogen target at the Riken RI Beam Factory in Wako, Japan. Upon impact, both the hydrogen and the fluorine-29 lost a proton, which created an entirely new molecule of oxygen-28, according to the study, published Aug. 30 in the journal Nature

Under the Standard Model, the leading theory of particle physics, particles should be stable if the shells in an atom's nucleus are filled with certain numbers of protons and neutrons that are known as "magic" numbers. Oxygen-28 contains 20 neutrons and eight protons, both of which are magic numbers, suggesting that the molecule should have been supremely stable or "doubly magic." But that was not the case.

During the experiment, the oxygen-28 molecule decayed within a zeptosecond, or a trillionth of a billionth of a second. In fact, its presence was only confirmed by the products it left behind when it decayed: oxygen-24 and four neutrons. 

"I was surprised," Takashi Nakamura, a physicist at the Tokyo Institute of Technology and co-author of the study, told Nature. "Personally, I thought it was doubly magic. But this is what nature says."

Though the experiment has not yet been replicated, the findings of this study suggest that the current list of magic numbers may not tell the full story of whether molecules are stable. In a separate case, scientists in 2009 showed that an oxygen-24 isotope behaved as though it were doubly magic, even though it did not have a magic number of protons and neutrons. 

The new study could pave the way for future research that may provide more clues about the mysterious forces gluing particles together in an atom's nucleus, according to Michael Thoennessen, a professor of physics at Michigan State University and co-author of the study.

"I think the results of the experiments demonstrate the importance of studying these exotic nuclei along and beyond the limit of existence," he told Live Science in an email. "We still do not fully know what binds neutrons and protons together to form nuclei. Exploring these extremes test the foundations of the nuclear models."

Kiley Price

Kiley Price is a former Live Science staff writer based in New York City. Her work has appeared in National Geographic, Slate, Mongabay and more. She holds a bachelor's degree from Wake Forest University, where she studied biology and journalism, and is pursuing a master's degree at New York University's Science, Health and Environmental Reporting Program.

  • Quantibility
    admin said:
    After scientists created oxygen-28 in the lab, it almost immediately degraded, baffling physicists around the world.

    'Doubly magic' form of oxygen may challenge a fundamental law of physics : Read more
    If one of the processes involved in creating oxygen-28 were to utilize an entangled system while the other necessary ingredient isn't entangled, it would introduce a complex and novel scenario. However, it's important to understand that quantum entanglement doesn't directly impact the macroscopic processes involved in nuclear reactions, but it could have indirect implications. Here's a theoretical discussion:

    Entangled vs. Non-Entangled: In this scenario, let's imagine that the particles involved in the collision, say fluorine-29 and a hydrogen target, are part of an entangled quantum system, while the subsequent processes that lead to the creation of oxygen-28 are not entangled.
    Initial Entanglement: When particles are entangled, their quantum states are correlated. Any measurements or changes to one particle's state instantaneously affect the other, even at a distance. In the context of nuclear reactions, this could imply that the collision parameters (e.g., energy, angular momentum) are inherently correlated, which could introduce a level of coordination or coherence to the collision process.
    Nuclear Reaction: Once the collision occurs and oxygen-28 is formed, it's important to note that nuclear reactions themselves are typically described by classical physics. The behavior of atomic nuclei during and after the reaction is determined by the strong and electromagnetic forces, which are typically not influenced by quantum entanglement at this scale.
    Indirect Influence: While entanglement might not directly affect the nuclear reaction, it could indirectly influence the characteristics of the resulting oxygen-28. For instance, the entangled collision might lead to specific quantum states of oxygen-28, which could have unique properties. These properties could, in theory, affect its stability or decay characteristics.
    Experimental Challenges: Implementing such a scenario experimentally would be incredibly challenging due to the delicate nature of quantum entanglement and the complexity of nuclear reactions. Maintaining quantum coherence over macroscopic scales, as required in this case, is extremely difficult.
    Theoretical Exploration: Theoretical physicists might explore this scenario to see if there are any unexpected quantum effects on the resulting nuclei, but it would likely remain a theoretical concept for the foreseeable future.In summary, while the concept of introducing quantum entanglement into the process of creating oxygen-28 is intriguing, it would likely have subtle and indirect effects on the resulting nuclei, primarily related to their quantum states. The nuclear reactions themselves would still be governed by classical physics, and experimental implementation would be an enormous challenge. This scenario blurs the boundaries between classical and quantum physics and highlights the intricate interplay between the two at different scales.

    this is my conversation about this tech and my idea that was rendered using OpenAI. #themoreyouknow.
  • Franny Baer
    It should be a safe assumption that any "mega stable" isotope that can be created in the lab, can also occur in nature, even if extremely rare. That O28 is not found should have been a clue it's not stable -- although super unstable is a surprise. Its instability is just one more example why there is no such thing as settled science.

    Experimental surprises is what makes research exciting.