电磁法分离高丰度铷-87及其应用

Electromagnetic Separation of High-abundance Rubidium-87 and Its Application

铷钟作为北斗卫星导航定位系统的核心部分,提供高精度的时间基准信号。其精度会直接影响北斗系统的性能,高丰度的同位素铷-87是铷钟的核心工作物质,是决定铷钟精度的重要因素。美、俄均利用电磁分离技术分离铷钟所需的高丰度铷-87同位素。目前国内同位素电磁分离铷-87同位素的产量仅能满足小部分需求。随着航天、芯片钟等领域对高丰度铷同位素需求大幅增长,导致国内铷同位素缺口进一步增加,未来每年对铷-87需求可能达数百克至数公斤量级。本研究通过分析量子时频领域的发展现状,掌握量子时频领域铷钟对铷-87同位素的需求情况,据此拟为电磁法分离制备铷同位素的产业化发展提供参考。铷-87同位素分离制备可通过技术攻关和规模化建设提升分离效率,降低生产成本,可为解决铷-87同位素自主可控提供重要保障。

The rubidium clock,as the core part of the Beidou satellite navigation and positioning system,mainly provides high-precision time reference signals.Its accuracy will directly affect the performance of the Beidou system.The high abundance isotope rubidium 87 is the core working material of rubidium clocks.Its abundance is an important factor affecting the accuracy of atomic clocks.The high-abundance rubidium-87 isotopes required for the separation of rubidium bells in the United States and Russia,two major isotope producing countries,use electromagnetic separation technology.At present,the production of rubidium 87 isotopes for electromagnetic isotope separation in China can only meet a small portion of the demand.With the arrival of the 5G era,the demand for high abundance rubidium isotopes in fields such as aerospace and chip clocks has significantly increased.It will further increase the gap in domestic rubidium isotopes.It is expected that the demand for rubidium 87 will reach several hundred grams to several kilograms per year in the future.By analyzing the current development status of the quantum time-frequency field and understanding the demand of rubidium clocks for rubidium 87 isotopes in the quantum timefrequency field,it provides guidance for the industrial development and ideas of electromagnetic separation and preparation of rubidium isotopes in the future.Promoting the industrial development of rubidium 87 isotope separation and preparation as soon as possible.Through technological breakthroughs and large-scale construction,separation efficiency can be improved and production costs can be reduced.This will provide important guarantees for the autonomous control of rubidium 87 isotopes.