B. Armbruster et al., KARMEN AT ISIS - THE ADVANTAGE OF A PULSED NEUTRINO SOURCE IN THE SEARCH FOR NEUTRINO OSCILLATIONS AND NEUTRINO NUCLEAR-INTERACTIONS, Nuclear physics. A, 629(1-2), 1998, pp. 507-516
KARMEN, the Karlsruhe-Rutherford Medium Energy Neutrinoexperiment at t
he pulsed spallation neutron facility ISIS uses the beam stop neutrino
s v(mu), v(e) and <(V)over bar (mu)> from pi(+) and mu(+) decay at res
t to search for neutrino oscillations in the appearance channels v(mu)
--> ve and <(v)over bar (mu)> --> <(v)over bar (e)>. The signature fo
r both oscillations is based on charged current neutrino nuclear inter
action spectroscopy in a high resolution 56 t liquid scintillator calo
rimeter. The detector system has been upgraded with an additional veto
layer during 1996 to eliminate cosmogenic background and to enhance i
ts sensitivity in the oscillation channels. This report describes the
results based on data acquired from June 1990 to August 1995 and the f
irst data of 1997 with the new veto system in operation.