5 research outputs found
Relationship of weather types on the seasonal and spatial variability of rainfall, runoff, and sediment yield in the western Mediterranean basin
Safety assessment of the substance (butadiene, styrene, methyl methacrylate, butyl acrylate) copolymer cross-linked with divinylbenzene or 1,3-butanediol dimethacrylate for use in food contact materials
Publisher PD
Spectroscopy of Lambda-9Li by electroproduction
In the absence of accurate data on the free two-body hyperon-nucleon
interaction, the spectra of hypernuclei can provide information on the details
of the effective hyperon-nucleon interaction. Electroproduction of the
hypernucleus Lambda-9Li has been studied for the first time with sub-MeV energy
resolution in Hall A at Jefferson Lab on a 9Be target. In order to increase the
counting rate and to provide unambiguous kaon identification, two
superconducting septum magnets and a Ring Imaging CHerenkov detector (RICH)
were added to the Hall A standard equipment. The cross section to low-lying
states of Lambda-9Li is concentrated within 3 MeV of the ground state and can
be fitted with four peaks. The positions of the doublets agree with theory
while a disagreement could exist with respect to the relative strengths of the
peaks in the doublets. A Lambda separation energy of 8.36 +- 0.08 (stat.) +-
0.08 (syst.) MeV was measured, in agreement with an earlier experiment.Comment: 14 pages, 8 figure