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Keyword：Facility for Rare Isotope Beams
US FRIB Experiment Reveals Magnetic Origin of Anomalous Low-Energy Gamma-Ray Enhancement
According to an August 21 announcement from Lawrence Livermore National Laboratory, a new study led by the U.S. Facility for Rare Isotope Beams (FRIB) with participation from researchers at Lawrence Livermore National Laboratory and other institutions has provided a new experimental explanation for the long-standing low-energy enhancement phenomenon in nuclear physics. The findings were published in the journal Nature. An experiment at the Facility for Rare Isotope Beams (FRIB) has yielded new results, answering a fundamental question about nuclear structure. (Image: FRIB) Gamma rays are a form of electromagnetic radiation. When an excited nucleus loses energy during radioactive decay and transitions to a lower, more stable energy level, it emits gamma rays. Over the past few decades, scientists have discovered that certain nuclei emit anomalously large numbers of low-energy gamma rays, but this phenomenon does not occur in all nuclei, and its occurrence conditions have been difficult to predict reliably in theory.
2026-08-21
US FRIB Research Reveals Low-Energy Gamma-Ray Enhancement Originates from Nuclear Magnetic Transitions
An international research team led by the US Facility for Rare Isotope Beams (FRIB), with participation from Lawrence Livermore National Laboratory (LLNL) and other institutions, recently published findings in Nature that explain a long-standing question in nuclear physics: why some atomic nuclei emit anomalously high numbers of low-energy gamma rays. Image: FRIB Gamma rays are a type of electromagnetic radiation. Excited atomic nuclei release gamma rays during radioactive decay, gradually returning to lower, more stable energy levels. Over the past few decades, scientists have discovered that certain nuclei exhibit a low-energy enhancement phenomenon, where the number of low-energy gamma rays emitted exceeds expectations. However, this phenomenon is not universal, and its occurrence is theoretically difficult to predict.
2026-08-18
U.S. Team Traces Source of Anomalous Gamma Rays from Zinc-70, Nuclear Magnetic Transitions May Improve Models of Heavy Element Formation
An international research team led by scientists from the Facility for Rare Isotope Beams (FRIB) at Michigan State University has recently identified the source of the large number of low-energy gamma rays emitted by zinc-70 nuclei. The study suggests that magnetic transitions occurring within the nucleus are the key reason for this anomalous signal enhancement. The findings were published in the journal Nature under the title "Magnetic character of the low-energy enhancement in 70Zn." Gamma rays are electromagnetic radiation released when excited atomic nuclei transition to lower, more stable energy levels. For a long time, scientists have observed an anomalous increase in the number of low-energy gamma rays in some atomic nuclei, known as the low-energy enhancement (LEE), but its physical mechanism had remained unclear...
2026-08-02