학술논문
The CeBrA demonstrator for particle-$\gamma$ coincidence experiments at the FSU Super-Enge Split-Pole Spectrograph
Document Type
Working Paper
Author
Conley, A. L.; Kelly, B.; Spieker, M.; Aggarwal, R.; Ajayi, S.; Baby, L. T.; Baker, S.; Benetti, C.; Conroy, I.; Cottle, P. D.; D`Amato, I. B.; DeRosa, P.; Esparza, J.; Genty, S.; Hanselman, K.; Hay, I.; Heinze, M.; Houlihan, D.; Khawaja, M. I.; Kielb, P. S.; Kuchera, A. N.; McCann, G. W.; Morelock, A. B.; Lopez-Saavedra, E.; Renom, R.; Riley, L. A.; Ryan, G.; Sandrik, A.; Sitaraman, V.; Temanson, E.; Wheeler, M.; Wibisono, C.; Wiedenhöver, I.
Source
Subject
Language
Abstract
We report on a highly selective experimental setup for particle-$\gamma$ coincidence experiments at the Super-Enge Split-Pole Spectrograph (SE-SPS) of the John D. Fox Superconducting Linear Accelerator Laboratory at Florida State University (FSU) using fast CeBr$_3$ scintillators for $\gamma$-ray detection. Specifically, we report on the results of characterization tests for the first five CeBr$_3$ scintillation detectors of the CeBr$_3$ Array (CeBrA) with respect to energy resolution and timing characteristics. We also present results from the first particle-$\gamma$ coincidence experiments successfully performed with the CeBrA demonstrator and the FSU SE-SPS. We show that with the new setup, $\gamma$-decay branching ratios and particle-$\gamma$ angular correlations can be measured very selectively using narrow excitation energy gates, which are possible thanks to the excellent particle energy resolution of the SE-SPS. In addition, we highlight that nuclear level lifetimes in the nanoseconds regime can be determined by measuring the time difference between particle detection with the SE-SPS focal-plane scintillator and $\gamma$-ray detection with the fast CeBrA detectors. Selective excitation energy gates with the SE-SPS exclude any feeding contributions to these lifetimes.