The SAGE spectrometer

In-beam γ -ray and electron spectroscopy of Md249,251

“…γ rays and conversion-electrons emitted at the target position were detected using an array known as Silicon And GErmanium (SAGE) [17]: γ rays were detected using Compton-suppressed HPGe detectors (20 coaxial and 24 clovers) having a total γ -ray photopeak efficiency of ≈10% at 200 keV and an average energy resolution of 2.8 keV FWHM at 1 MeV. A stack of 0.5-mm-thick Cu and 0.1-mm-thick Sn absorbers were placed in front of the Ge detectors to reduce the contribution of fission-fragments x rays.…”

Excited states in Ra217 populated in the α decay of Th221

“…A beam of 18 O with energy 95 MeV and intensity ≈18 pnA was incident upon a selfsupporting 208 Pb target of thickness 0.45 mg cm −2 , with a 0.1 mg cm −2 12 C charge-reset foil downstream of the target. The beam was on target for approximately 157 h. The target was located at the center of the SAGE spectrometer [14], which was used to detect prompt γ rays and internal-conversion electrons; however, data from the SAGE spectrometer were not used for the α-decay studies in this work. Downstream of the target, recoiling evaporation residues were separated from fission fragments and unreacted beam ions using the RITU gas-filled recoil separator [15,16] and were transported to its focal plane.…”

α -decay spectroscopy of the N=130 isotones Ra218 and Parr1, Smith2, Greenlees3 et al. 2019Phys. Rev. CSelf Cite

“…Both experiments used the same experimental set-up, which is described below. In both experiments the target was located at the center of the SAGE spectrometer [28], which was used to detect prompt γ rays and internal-conversion electrons; however, data from the SAGE spectrometer are not presented in this paper. Downstream of the target, recoiling evaporation residues were separated from fission fragments and unreacted beam ions using the RITU gas-filled recoil separator [29,30] and were transported to its focal plane.…”