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Updated: Jun 4, 2025
10:42
Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
Published on: May 3, 2019
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固态核时钟的薄膜
Chuankun Zhang1, Lars von der Wense1,2, Jack F Doyle1
1JILA, NIST and University of Colorado, Department of Physics, University of Colorado, Boulder, CO, USA.
Nature
|December 18, 2024
概括
研究人员开发了一种用于核钟的-229 (229Th) 薄膜的新方法. 这种可扩展的方法使用微克量的229Th,减少放射性,并使现场部署的固态核钟成为可能.
科学领域:
- 核物理
- 量子光学
- 材料科学
背景情况:
- -229 (229Th) 核异构过渡是下一代核钟的一个有希望的候选.
- 由于材料稀缺,放射性和复杂的处理,目前使用229Th合晶体的方法面临挑战.
- 在229Th光谱学的进步需要各种应用的可扩展和强大的目标材料.
研究的目的:
- 开发一种可扩展和高效的方法来准备229Th光谱目标.
- 证明使用229ThF4薄膜用于核时钟的可行性.
- 减少基于229Th的技术所需的放射性材料的数量.
主要方法:
- 使用物理蒸汽沉积培养了-229四化物 (229ThF4) 的薄膜.
- 在229ThF4薄膜内对229Th核过渡进行激光激发.
- 将229ThF4薄膜的放射性与传统的229Th合晶体进行了比较.
主要成果:
- 在229ThF4薄膜中成功演示了229Th核过渡的激光激发.
- 薄膜方法只需要微克的229Th材料,比以前的方法少得多.
- 229ThF4薄膜与光子平台和纳米制造兼容,使集成设备成为可能.
- 放射性水平比典型的229Th合晶体低三倍.
- 229ThF4的高核发射密度为量子光学研究提供了可能性.
结论:
- 229ThF4薄膜的物理蒸汽沉积为229Th光谱目标提供了可扩展的解决方案.
- 这种方法为集成的,可在现场部署的,具有减少放射性的固态核钟铺平了道路.
- 开发的薄膜具有推动核钟技术和量子光学研究的潜力.
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