(1) Physik-Department E18, TU- München, D-85747 Garching, Germany, DE;(2) School of Chemistry, Physics and Environmental Science, University of Sussex, Brighton, Sussex, BNI 9QJ, UK, GB
Abstract:
Ultra-cold neutrons (UCN) are produced in superfluid helium by single- and multi-phonon excitation. The UCN production rate density RII via multiphonons can be larger than that by one-phonon excitation RI being due to the dependence of the incident neutron spectral flux density dφ/dλ on the wavelength λ. Received: 28 March 2002 / Accepted: 19 December 2002 / Published online: 11 March 2003 RID="a" ID="a"e-mail: wschott@e18.physik.tu-muenchen.de RID="b" ID="b"On leave of absence from PNPI, Gatchina, Russia Communicated by T. Walcher