The MUGAST-AGATA-VAMOS campaign: Set-up and performances
The MUGAST-AGATA-VAMOS campaign: Set-up and performances
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MUGAST-AGATA-VAMOS 活动：设置和表演
DOI：
10.1016/j.nima.2021.165743
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Assié M
中科院分区：
文献类型：
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作者：
Assié M
GANIL的MUGAST-AGATA-VAMOS装置将MUGAST高分段硅阵列与最先进的AGATA阵列和大型可接受的VAMOS光谱仪结合在一起。机械和电子一体化解决了每个设备的最大效率的限制，特别是硅阵列的γ-射线透明度。这种完整的设置提供了一个独一无二的机会，可以对来自SPIRAL1设施的放射性束流进行独家直接反应测量。通过其调试和在战役期间测量的两个转移反应的例子来描述该设置的性能。通过三重符合测量，实现了对感兴趣原子核的高精度光谱，包括截面和角分布。此外，通过对轻粒子的探测和二体运动学的使用，改善了对γ射线能量的多普勒效应的修正，并通过识别重残基获得了完全拒绝背景贡献的结果。此外，该系统还可以处理高强度光束(最高可达108 pps)。研究了基于MUGAST和VAMOS之间飞行时间测量和轨迹重建的粒子识别方法。
Abstract The MUGAST-AGATA-VAMOS set-up at GANIL combines the MUGAST highly-segmented silicon array with the state-of-the-art AGATA array and the large acceptance VAMOS spectrometer. The mechanical and electronics integration copes with the constraints of maximum efficiency for each device, in particular γ-ray transparency for the silicon array. This complete set-up offers a unique opportunity to perform exclusive measurements of direct reactions with the radioactive beams from the SPIRAL1 facility. The performance of the set-up is described through its commissioning and two examples of transfer reactions measured during the campaign. High accuracy spectroscopy of the nuclei of interest, including cross-sections and angular distributions, is achieved through the triple-coincidence measurement. In addition, the correction from Doppler effect of the γ-ray energies is improved by the detection of the light particles and the use of two-body kinematics and a full rejection of the background contributions is obtained through the identification of heavy residues. Moreover, the system can handle high intensity beams (up to 10 8 pps). The particle identification based on the measurement of the time-of-flight between MUGAST and VAMOS and the reconstruction of the trajectories is investigated.