12 research outputs found
Dynamical restriction for a growing neck due to mass parameters in a dinuclear system
Mass parameters for collective variables of a dinuclear system and strongly
deformed mononucleus are microscopically formulated with the linear response
theory making use of the width of single particle states and the
fluctuation-dissipation theorem. For the relative motion of the nuclei and for
the degree of freedom describing the neck between the nuclei, we calculate mass
parameters with basis states of the adiabatic and diabatic two-center shell
model. Microscopical mass parameters are found larger than the ones obtained
with the hydrodynamical model and give a strong hindrance for a melting of the
dinuclear system along the internuclear distance into a compound system.
Therefore, the dinuclear system lives a long time enough comparable to the
reaction time for fusion by nucleon transfer. Consequences of this effect for
the complete fusion process are discussed.Comment: 22 pages, 7 figures, submitted to Nucl.Phys.
Detector Description and Performance for the First Coincidence Observations between LIGO and GEO
For 17 days in August and September 2002, the LIGO and GEO interferometer
gravitational wave detectors were operated in coincidence to produce their
first data for scientific analysis. Although the detectors were still far from
their design sensitivity levels, the data can be used to place better upper
limits on the flux of gravitational waves incident on the earth than previous
direct measurements. This paper describes the instruments and the data in some
detail, as a companion to analysis papers based on the first data.Comment: 41 pages, 9 figures 17 Sept 03: author list amended, minor editorial
change