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CERN

Artistic visualization of the electromagnetic forces at play during ultra-peripheral collisions at CERN's Large Hadron Collider, where lead ions traveling at near-light speed generate intense photon bursts capable of nuclear transmutation. The glowing energy streams represent the moment when physics transforms lead into gold through pure electromagnetic interaction, bringing ancient alchemical dreams into the realm of quantum reality.

点铅成金:欧洲核子研究中心(CERN)的真实炼金术

Picture of the ALICE detector, Image Credit: CERN 当相对论物理实现了古老的炼金梦想 在日内瓦附近欧洲核子研究中心(CERN)庞大建筑群的静谧走廊中,一个曾经令中世纪炼金术士痴迷的追求找到了现代科学的实现。使用ALICE(大型离子对撞实验)探测器的物理学家们已观测到铅向黄金的转变。然而,这种嬗变并非源于神秘的咒语,而是量子力学与相对论物理学的相互作用,当铅原子核被加速到光速的99.999993%时,它们经历近距离碰撞。 ALICE合作团队最近在《物理评论期刊》上发表了他们的发现,对这一发生在大型强子对撞机27公里环形隧道内的非凡现象进行了定量研究。他们的研究超越了科学好奇心的范畴,为爱因斯坦的标志性方程E=mc²提供了深刻的演示,展示了物质在极端条件下的转变。”令人印象深刻的是,我们的探测器既能处理产生数千个粒子的正面碰撞,同时也能敏感地探测到每次只产生少数粒子的碰撞,”ALICE发言人马可·范·莱文(Marco Van Leeuwen)解释道。”这使得电磁核嬗变过程的研究成为可能。” 这种转变是电磁离解的结果。当含有82个质子的铅原子核以相对论速度勉强避免直接撞击时,它们产生令人难以置信的强烈电磁场。这些电磁场被压缩成超薄的煎饼状波,产生足够强大的光子脉冲,能够从铅原子核中弹出三个质子,将其转变为含有79个质子的黄金。 利用零度量能器,ALICE团队以卓越的精度测量了这些相互作用。他们的数据表明,在一秒钟的运行期间,大约有89,000个金原子核在ALICE碰撞点形成。这些新形成的金原子核在其嬗变状态下仅存在几分之一秒,然后在与加速器基础设施接触时分解为亚原子粒子。 This illustration depicts the remarkable phenomenon of ultra-peripheral collision at the LHC, where two lead ion beams (208Pb) streak past each other in a near miss rather than direct impact. During this electromagnetic dissociation process, high-energy photons interact with the […]

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Artistic visualization of the electromagnetic forces at play during ultra-peripheral collisions at CERN's Large Hadron Collider, where lead ions traveling at near-light speed generate intense photon bursts capable of nuclear transmutation. The glowing energy streams represent the moment when physics transforms lead into gold through pure electromagnetic interaction, bringing ancient alchemical dreams into the realm of quantum reality.

Turning Lead into Gold: The Real Alchemy at CERN

Picture of the ALICE detector, Image Credit: CERN How Relativistic Physics Fulfills an Ancient Alchemical Dream In the hushed corridors of CERN‘s sprawling complex near Geneva, a pursuit that once captivated medieval alchemists has found a modern scientific realization. Physicists using the ALICE (A Large Ion Collider Experiment) detector have observed the transformation of lead

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