Beta-delayed charged-particle spectroscopy using TexAT
Beta-delayed charged-particle spectroscopy using TexAT
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DOI：
10.1016/j.nima.2020.163773
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发表时间：
2020-06-01
影响因子：
1.4
通讯作者：
Upadhyayula, S.
中科院分区：
文献类型：
--
作者：
Bishop, J.;Rogachev, G. V.;Upadhyayula, S.
β延迟带电粒子发射是轻核三体衰变的灵敏探针。时间投影室（TPC）提供了一个显着的优势，传统的带电粒子光谱技术，由于一个低的能量阈值和高的几何效率（约4 π），这是必不可少的使用与放射性离子束的束强度是有限的。研究表明，使用德克萨斯主动目标（TexAT）TPC与通用电子TPC（GET）系统结合使用，可以实现β延迟带电粒子发射的高灵敏度光谱技术。研究的基准案例是N-12 β-衰变到C-12中的第一个α-未结合态，即霍伊尔态。半衰期和分支比的测量，并与以前的研究结果一致。使用TPC研究这样的近阈值状态和解开的衰变产物的三体动力学的功效被证明。
beta-delayed charged-particle emission is a sensitive probe of three-body decays in light nuclei. Time Projection Chambers (TPCs) offer a significant advantage over traditional charged-particle spectroscopy techniques due to a low-energy threshold and a high-geometric efficiency (approximate to 4 pi) which are essential for use with radioactive ion beams where the beam intensities are limited. The technique for high-sensitivity spectroscopy of beta-delayed charged-particle emission is shown to be possible using the Texas Active Target (TexAT) TPC in conjunction with the General Electronics for TPCs (GET) system. The benchmark case studied was that of N-12 beta-decay to the first alpha-unbound state in C-12, the Hoyle state. Half-life and branching ratio measurements are presented and are in good agreement with previous studies. The efficacy of using TPCs to study such a near-threshold state and disentangle the three-body dynamics of the decay products is demonstrated.