Details

Autor(en) / Beteiligte

• Lopez, J.
• Terao, K.
• Conrad, J.M.
• Dujmic, D.
• Winslow, L.

Titel

A prototype detector for directional measurement of the cosmogenic neutron flux

Ist Teil von

• Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 2012-05, Vol.673, p.22-31

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This paper describes a novel directional neutron detector. The low pressure time projection chamber uses a mix of helium and CF4 gases. The detector reconstructs the energy and angular distribution of fast neutron recoils. This paper reports results of energy calibration using an α source and angular reconstruction studies using a collimated neutron source. The best performance is obtained with a 12.5% CF4–87.5% He gas mixture. At low energies the target for fast neutrons transitions is primarily helium, while at higher energies, the fluorine contributes as a target. The reconstruction efficiency is both energy and target dependent. For neutrons with energies less than 20MeV, the reconstruction efficiency is ∼40% for fluorine recoils and ∼60% for helium recoils.