A collinear laser spectroscopy extension to the McGill cooler-buncher set-up

麦吉尔冷却聚束装置的共线激光光谱扩展

• 批准号: 346149-2007
• 负责人: Buchinger, Fritz
• 金额: $ 1.53万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Research Tools and Instruments
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=361701
• 关键词: collinear; laser; spectroscopy; extension; McGill

Collinear fast beam laser spectroscopy is a well-established method for measuring hyperfine structures and isotopic shifts with high sensitivity and resolution. From the optical spectra information on nuclear ground state properties, such as spins moments and changes in mean square charge radii can be derived. The information is especially valuable when available for nuclei far from stability and is commonly used for testing and improving nuclear models and mass formulas.We have initiated a collinear fast beam laser spectroscopy experiment at ISAC (TRIUMF), where we have measured the nuclear moments of the short lived isotope 131La using continuous ion beams excited by a laser. However neighbouring isotopes are produced at ISAC with lower yields and the sensitivity of our apparatus has to be increased for extending our measurements. This will be possible by using bunched ion beams which will become available from a bunching device built for mass measurements with the TITAN mass spectrometer at ISAC. The use of bunched beams allows an increase of the signal to noise ratio in the observed spectra by using gating or coincidence techniques.This application asks for funds for components which will help us to establish a collinear fast beam laser spectroscopy section at our buncher device operated off-line at McGill. This set-up will be used for off-line tests of excitation and detection schemes, which will then be applied on-line at ISAC.

共线快束激光光谱是一种成熟的测量超精细结构和同位素位移的方法，具有高灵敏度和高分辨率。从光谱信息的核基态性质，如自旋矩和变化的均方电荷半径可以导出。这些信息是特别有价值的核远离稳定时，通常用于测试和改进核模型和质量formulation.We启动了共线快束激光光谱实验在ISAC（TRIUMF），在那里我们已经测量了短寿命同位素131 La的核力矩使用连续离子束激光激发。然而，邻近的同位素在ISAC产生的产量较低，我们的设备的灵敏度必须增加，以扩大我们的测量。这将是可能的，通过使用聚束离子束，这将成为可从一个聚束装置建立的质量测量与泰坦质谱仪在ISAC。聚束的使用允许通过使用选通或符合techniques.This应用程序要求的组件，这将有助于我们建立一个共线的快束激光光谱部分在我们的聚束装置麦吉尔离线操作的资金增加的信噪比观察spectrum。该装置将用于激励和检测方案的离线测试，然后将在ISAC在线应用。