Physics – Nuclear Physics
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..dnp..f709m&link_type=abstract
American Physical Society, Division of Nuclear Physics Meeting, October 28-31, 1998 Santa Fe, New Mexico, abstract #F7.09
Physics
Nuclear Physics
Scientific paper
Experiments with magneto-optically trapped ^38mK at TRIUMF are currently underway that use a micro-channel plate (MCP) and β telescope to observe the recoiling Ar and β^+ respectively. The β telescope consists of a 5.5cm diameter x 6.5cm BC408 plastic scintillator mounted behind an X-Y position sensitive double-sided Si-strip detector (PSD). Coincidences between the ΔE and E detectors allow an efficient veto of γ backgrounds and provide 1mm spatial resolution of the detected positron. The scintillator was designed with the aid of monte carlo simulations for minimized lineshape tail and uniformity of response to E_β^+ and position, resulting in fracΔ EE = 9.7 % at 1.6MeV. This energy measurement, the < 1ns relative timing between the MCP and scintillator, and the position information from the MCP and PSD together provide overdetermined kinematic information, useful for rejecting backgrounds and assessing systematic errors.
Alford W. P.
Ball Gregory
Behr J. A.
Buchmann Lothar
D'Auria John M.
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