Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 940, Issue -, Pages 93-102Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2019.05.100
Keywords
MICROMEGAS; beta-delayed proton emission; MPGD; Si-25(beta p)Mg-24; Radiative proton capture; Nuclear astrophysics
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Funding
- U.S. National Science Foundation [PHY-1102511, PHY-1565546]
- U.S. Department of Energy, Office of Science [DE-SC0016052]
- U.S. Department of Energy (DOE) [DE-SC0016052] Funding Source: U.S. Department of Energy (DOE)
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The Gaseous Detector with Germanium Tagging (GADGET) is a new detection system devoted to the measurement of weak, low-energy beta-delayed proton decays relevant for nuclear astrophysics studies. It is comprised of a new gaseous Proton Detector equipped with a Micromegas readout for charged particle detection, surrounded by the existing Segmented Germanium Array (SeGA) for the high-resolution detection of the prompt gamma-rays. In this work we describe in detail for the first time the design, construction, and operation of the GADGET system, including performance of the Proton Detector. We present the results of a recent commissioning experiment performed with Si-25 beam at the National Superconducting Cyclotron Laboratory (NSCL). GADGET provided low-background, low-energy beta-delayed proton detection with efficiency above 95%, and relatively good efficiency for proton-gamma coincidences (2.7% at 1.37 MeV).
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