Article title: Charge resolution in the isochronous mass spectrometry and the mass of ⁵¹Co

等时性质谱术中的电荷分辨与⁵¹Co的质量

DOI: 10.1007/s41365-021-00876-0

One sentence summary:

Researchers are introducing a new analysis method to improve the charge resolution for ions in isochronous mass spectrometry experiments.

一句话概要：

研究人员引入了一种新的数据分析方法，提高了等时质谱实验中离子的电荷分辨率。

http://www.nst.sinap.ac.cn/newsDetails/112/3847/en/

The Novelty (What)

The mass measurements of short-lived nuclei require advanced facilities as well as high-level knowledge and skills. This study reports a new analysis method for isochronous mass spectrometry (IMS) experiments that led to significant improvements in charge resolution for ions. By considering the signal amplitudes, detection efficiencies, and the number of stored ions in the heavy-ion storage ring, ion pairs with nearly identical mass-to-charge (m/q) ratios can be resolved in terms of their revolution times. The new method enabled a complete resolution of ³⁴Ar and ⁵¹Co in this study. Additionally, a consistent mass excess of ⁵¹Co was determined.

创新性（主要内容）

短命原子核的质量测量需要先进的设备以及高水平的知识和技能。 本研究报告了一种新的等时质谱(IMS)实验分析方法，该方法使得离子的电荷分辨能力显著提高。 通过考虑信号幅值、探测效率和重离子储存环中储存离子的数量,可以用它们的循环周期来解析具有几乎相同质荷比(m/q)的离子对。 新方法使³⁴Ar和⁵¹Co在本研究中得到了完美的分辨。 此外，还确定了⁵¹Co的一致质量过量。

The Background (Why)

IMS of heavy-ion storage rings is a powerful technique to measure the mass of short-lived nuclei. Its working principle relies highly on its ability to measure the revolution times of ions precisely. Nonetheless, there was a limitation in the measurements for pairs of ion species with nearly identical m/q ratios. To address this, the researchers analyzed the amplitudes of the timing signals from the detector based on the emission of secondary electrons in a previous study. The introduction of a new analysis method was able to deduce revolution times with differences as low as 1.8 ps. This led to a higher charge resolution, enabling the complete resolution of ³⁴Ar and ⁵¹Co (A/Z = 17/9). The new analysis method would facilitate the progress of other atomic and nuclear physics experiments using similar types of detectors.

研究背景（主要原因）

重离子储存环的IMS是一种测量短命原子核质量的有力工具。 它的工作原理很大程度上依赖于它对离子循环周期的精确测量能力。 然而，IMS对于具有几乎相同的m/q比的离子对的测量存在局限性。在先前的一项研究中，研究人员曾根据二次电子的发射原理，分析并利用了探测器定时信号的幅度来解决这一问题。 本工作中，一种新的分析方法得以引入，能够推导出差值低至1.8ps的循环时间。 这导致了更高的电荷分辨率，使得³⁴Ar和⁵¹Co (A/Z=17/9)的完全分辨得以实现。 新的分析方法将促进使用类似类型探测器的其他原子和核物理实验的进展。

The SDG impact (Big Why)

SDG影响力（研究意义）

Nuclear technologies are useful to meet some of the fundamental needs of modern daily life. These include access to energy and proper medical care, food production, water resources management, and many more. Having effective methods to study exotic short-lived nuclei could open up endless possibilities for further exploring nuclear technology applications. The new analysis method reported by this study has enabled accurate characterizations of short-lived nuclei. Its contributions, aligned with UNSDG 9: Industries, Innovation & Infrastructure, promises the enhancement of scientific research necessary for upgrading existing and future nuclear technological capabilities.

SDG影响力（研究意义）

核技术有助于满足现代日常生活的一些基本需要。 其中包括获得能源和适当的医疗保健、粮食生产、水资源管理等等。 拥有研究奇异短命核的有效方法，将为进一步探索核技术应用开辟无穷无尽的可能性。 这项研究报告的新的分析方法使短命原子核的精确表征成为可能。 它的贡献与联合国可持续发展目标9：工业、创新和基础设施相一致，承诺加强现有和未来核技术能力升级所需的科学研究。