论文标题
使用X射线脉冲转移到$^{2.29m} $ th isomer的核一致人口
Nuclear coherent population transfer to the $^{229m}$Th isomer using x-ray pulses
论文作者
论文摘要
从理论上研究了8 eV $^{2.29m} $ th Isomer通过第二个核激发态通过相干X射线脉冲在29.19 KeV处的人群进行了研究。我们使用从量子光学器件中已知的部分重叠的X射线脉冲：刺激的拉曼绝热通道（stirap）和连续的$π$脉冲来关注两个核一致的种群转移方案。为三个可能的实验设置提供了数值结果。我们的结果将伽马工厂确定为最有前途的情况，其中两种紫外线脉冲与相对加速的离子相结合提供了所需的强度，以提供高效的异构体人群。我们的模拟需要了解频段和跨波段核转变概率。我们为后者提供理论上预测的值，并在最近的实验中进行讨论。
Population of the 8 eV $^{229m}$Th isomer via the second nuclear excited state at 29.19 keV by means of coherent x-ray pulses is investigated theoretically. We focus on two nuclear coherent population transfer schemes using partially overlapping x-ray pulses known from quantum optics: stimulated Raman adiabatic passage (STIRAP), and successive $π$ pulses. Numerical results are presented for three possible experimental setups. Our results identify the Gamma Factory as the most promising scenario, where two ultraviolet pulses combined with relativistically accelerated ions deliver the required intensities for efficient isomer population. Our simulations require knowledge of the in-band and cross-band nuclear transition probabilities. We give theoretically predicted values for the latter and discuss them in the context of recent experiments.
