由美国密歇根州立大学稀有同位素束设施(FRIB)领导的国际研究团队成功揭示了锌-70核素释放的低能伽马射线的来源，将其追溯到核内的磁转变1。这一发现刊登在《自然》杂志上，题为《Magnetic Character of the Low-Energy Enhancement in 70Zn》1，有助于改进关于恒星、超新星和中子星并合如何制造重元素的科学模型1。
低能增强现象已困扰科学界数十年1。研究发现，磁转变产生了这种低能增强现象，进而增加中子捕获反应的频率1。这一机制在超新星和中子星并合等极端宇宙事件中扮演关键角色，直接影响宇宙中重元素的产生过程1。此项国际合作汇聚了来自美国、加拿大、意大利、德国、挪威和韩国共25个机构的科研力量1，研究团队运用了FRIB的低能束和离子阱(LEBIT)以及求和NaI(SuN)探测器等专门仪器完成了这项研究1。
An international research team led by the Facility for Rare Isotope Beams (FRIB) at Michigan State University has identified the source of mysterious low-energy gamma rays emitted by zinc-70 nuclei, tracing the phenomenon to a magnetic transition within the nucleus.1 The discovery, published in Nature under the title "Magnetic Character of the Low-Energy Enhancement in 70Zn," advances scientific understanding of how heavy elements are created in stars, supernovae, and neutron star mergers.1
The research resolves a puzzle that has confronted the scientific community for decades: the origin of the low-energy enhancement (LEE) phenomenon observed in certain nuclei.1 The team determined that magnetic transitions produce this effect, which increases the frequency of neutron capture reactions.1 This enhanced neutron capture directly influences heavy element production during extreme cosmic events such as supernovae and neutron star mergers, making the findings crucial for refining models of stellar nucleosynthesis.1
The collaboration involved 25 institutions from the United States, Canada, Italy, Germany, Norway, and South Korea.1 Researchers employed specialized instruments at FRIB, including the Low-Energy Beam and Ion Trap (LEBIT) and the Summing NaI (SuN) detector, to conduct the investigation.1
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