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RX J0852.0-4622 is a shell type supernova remnant with a power law spectrumin the south-eastern corner of the Vela supernova remnant. We report XMM-Newtonobservations of three fields centered on the rim of the remnant and confirm thepower law shape of the spectra with no prominent emission lines as previouslyobtained with ASCA. The emission line feature at ~4.1 keV indicated in theASCA/SIS spectrum of the northern field is detected and found in the southernand western fields, as well, with a total significance of slightly more than 4sigmas. The line position is improved and the feature is centered on 4.45 +/-0.05 keV. We suggest this line feature to be emission from Ti and Sc. Themeasured X-ray flux is consistent with the Ti gamma-ray flux previouslymeasured with COMPTEL. We discuss various physical processes which may lead tothe creation of these lines, and we discuss the implications for the progenitorand the supernova type.Comment: 10 pages, 9 figures, A&A in prin

XMM-Newtonobservations of the supernova remnant RX J0852.0-4622/GRO J0852-4642