TY - JOUR
T1 - The LSU-Argonne conversion electron spectrometer
T2 - A new detector for the X-Array and SATURN decay station
AU - Lopez-Caceres, S.
AU - Marley, S. T.
AU - Carpenter, M. P.
AU - Savard, G.
AU - Kondev, F. G.
AU - Copp, P.
AU - Reviol, W.
AU - Müller-Gatermann, C.
AU - Seweryniak, D.
AU - Clark, J. A.
AU - Santiago-Gonzalez, D.
AU - Morgan, G. E.
AU - Mitchell, A. J.
AU - Wilson, G. L.
AU - Smith, M. L.
N1 - Publisher Copyright:
© 2024
PY - 2024/5
Y1 - 2024/5
N2 - A new conversion electron detector has been commissioned at the ATLAS/ CARIBU facility at Argonne National Laboratory. The LSU-Argonne Conversion Electron Spectrometer (LACES) is a LN2-cooled Si(Li) detector system designed to be incorporated into a decay station that comprises the dedicated HPGe clover array with a box geometry (X-Array) and the Scintillator and Tape Using Radioactive Nuclei (SATURN) device. This integration enables simultaneous measurements of conversion electrons and gamma-rays in decay experiments, yielding novel information on transition multipolarities, electric monopole transitions, and isomeric states that decay mostly via conversion electrons. A measurement of the energy resolution of LACES yielded 2.3-keV FWHM at 975 keV for electrons and 1.3-keV FWHM at 75 keV for X-rays. A detailed study of the absolute detection efficiency (at 5 mm from the source) was performed, where this quantity was determined experimentally in the range of electron transition energies between 25.5 keV and 1047.8 keV and subsequently simulated using the GEANT4 code. Measurement and simulations are found to be in excellent agreement. A precise characterization, for this type of detector system, of the absolute detection efficiency for such a wide energy range is reported for the first time.
AB - A new conversion electron detector has been commissioned at the ATLAS/ CARIBU facility at Argonne National Laboratory. The LSU-Argonne Conversion Electron Spectrometer (LACES) is a LN2-cooled Si(Li) detector system designed to be incorporated into a decay station that comprises the dedicated HPGe clover array with a box geometry (X-Array) and the Scintillator and Tape Using Radioactive Nuclei (SATURN) device. This integration enables simultaneous measurements of conversion electrons and gamma-rays in decay experiments, yielding novel information on transition multipolarities, electric monopole transitions, and isomeric states that decay mostly via conversion electrons. A measurement of the energy resolution of LACES yielded 2.3-keV FWHM at 975 keV for electrons and 1.3-keV FWHM at 75 keV for X-rays. A detailed study of the absolute detection efficiency (at 5 mm from the source) was performed, where this quantity was determined experimentally in the range of electron transition energies between 25.5 keV and 1047.8 keV and subsequently simulated using the GEANT4 code. Measurement and simulations are found to be in excellent agreement. A precise characterization, for this type of detector system, of the absolute detection efficiency for such a wide energy range is reported for the first time.
KW - Decay station
KW - Electric monopole
KW - Electron spectrometer
KW - Internal conversion electrons
KW - Lithium-drifted silicon detectors
UR - http://www.scopus.com/inward/record.url?scp=85186760432&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2024.169228
DO - 10.1016/j.nima.2024.169228
M3 - Article
SN - 0168-9002
VL - 1062
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
M1 - 169228
ER -