The development of radioactive ion beam facilities has opened the opportunity to perform direct reactions with unstable beams in inverse kinematics. This requires light targets of suitable density (0.1-1 mg/cm2) to achieve a luminosity sufficient for nuclear spectroscopy. A prototype for a cryogenic 3,4He target was developed at Legnaro National Laboratories, reaching the required helium density operating at a temperature around 10 K. The design was chosen for its compatibility with the future GRIT-AGATA set-up and SPES exotic beams. It also offers good transparency to γ rays. The results of tests with an α source and of a commissioning with a proton beam are reported.
CTADIR: A 3,4He Cryogenic TArget for DIrect Reactions at low energy
Goasduff A.;Zanon I.;Brugnara D.;Galtarossa F.;Mengoni D.;Pellumaj J.;Pigliapoco S.;Recchia F.;
2025
Abstract
The development of radioactive ion beam facilities has opened the opportunity to perform direct reactions with unstable beams in inverse kinematics. This requires light targets of suitable density (0.1-1 mg/cm2) to achieve a luminosity sufficient for nuclear spectroscopy. A prototype for a cryogenic 3,4He target was developed at Legnaro National Laboratories, reaching the required helium density operating at a temperature around 10 K. The design was chosen for its compatibility with the future GRIT-AGATA set-up and SPES exotic beams. It also offers good transparency to γ rays. The results of tests with an α source and of a commissioning with a proton beam are reported.
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