Improving energy resolution in an α-TOF detector

IF 1.7 4区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Physics A Pub Date : 2025-07-07 DOI:10.1016/j.nuclphysa.2025.123202

Peter Schury , Toshitaka Niwase , Michiharu Wada , Kouji Morimoto , Daiya Kaji , Sota Kimura , Yuki Yamanouchi

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引用次数: 0

Abstract

The alpha-TOF detector is a commercial MagneTOF ion detector with a silicon PIN diode embedded in the impact plate. We have developed the device for use in multi-reflection time-of-flight (ToF) mass spectrometry of radioisotopes, in particular superheavy elements. The alpha-decay signals provide a succinct means to identify that an implanted ion was indeed from a radioisotope ion. Until now, however, inherent noise in the detector limited the energy resolution to around

σ_{E} \approx 150

keV full-width, which was insufficient for precise identification from

E_{α}

. By selectively shutting off the high-voltage bias applied to the detector's dynode, we have significantly reduced the noise in the detector and achieved a resolution of

σ_{E}

≈20 keV full-width. This will allow precise identification of the nuclide and nuclear state of each decay-correlated ToF event.

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提高α-TOF探测器的能量分辨率

α - tof探测器是一种商用磁通离子探测器，在冲击板中嵌入了一个硅PIN二极管。我们已经开发了用于放射性同位素，特别是超重元素的多重反射飞行时间（ToF）质谱分析的设备。α衰变信号提供了一种简单的方法来确定注入的离子确实来自放射性同位素离子。然而，由于探测器本身存在的噪声，使得探测器的能量分辨率限制在σE≈150 keV左右，无法实现对Eα的精确识别。通过选择性地关闭施加在探测器节点上的高压偏置，我们显著降低了探测器中的噪声，并实现了σE≈20 keV全宽的分辨率。这将允许精确地识别每个衰变相关ToF事件的核素和核状态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Physics A 物理-物理：核物理

CiteScore

3.60

自引率

7.10%

发文量

113

审稿时长

61 days

期刊介绍： Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.