This title appears in the Scientific Report : 2000 

Measurement of subthreshold k+ production in pA collisions with ANKE
Barsov, S.
Erven, W.
Zentralinstitut für Elektronik; ZEL
Zentralinstitut für Technologie; ZAT
Acta physica Polonica / B, 31 (2000) S. 2159
Cracow Inst. of Physics, Jagellonian Univ. 2000
2159
Journal Article
Experimente an COSY
Detektoren, Signal- und Bildverarbeitung für Neutronen-, Gamma- und Röntgenstrahlung
Acta Physica Polonica B 31
J
The magnetic spectrometer ANKE has been put into operation in spring 1998 at the cooler synchrotron COSY-Julich. ANKE allows to momentum analyze ejectiles emitted from an internal target at forward angles approximate to 0 degrees with high angular acceptance Delta Omega approximate to 50 msr. A primary goal of the physics program with ANKE is the investigation of K (+) production in proton-nucleus collisions at energies around and far below the free nucleon-nucleon threshold at T = 1.58 GeV. The measurements have been performed with C, Cu and Au targets at various energies in the range T = 1.0,..., 2.3 GeV. The major experimental challenge is that the kaon-to-background ratio is as low as similar to 10(-6) at the lowest energy. Data on the target-mass dependence of the production cross sections for kaon momenta p(K+) = 150,..., 510 MeV/c at beam energies of T = 1.0 and 2.3 GeV are presented.