Chapter III: Hydrologic Cycle

How old is groundwater in Kherlen River basin? ......80Where does Kherlen River water come from? ......81How much groundwater is available in a well? ......82Precipitation over Mongolia may provide good isotopic thermometers ......8

Chapter V: Ecosystem

Characteristics of grassland soil of the northeastern Mongolia ......89Species composition of grassland in central Mongolia ......90Vegetation recovery from abandoned vehicle tracks ......92Vegetation and grazing impact in a Mongolian grassland ......93Influence of gazing on grassland water and energy balance ......94Productivity of grassland in central Mongolia ......9

Chapter VI: Hydrologic Cycle and Ecosystem

Impact of interannual variability of meteorological parameters on vegetation activity over Mongolia ......97Vegetation phenology refined ......98Larch trees use deeper soil moisture under water shortage ......99Ecosystem function and water condition in a semi-arid grassland ......100Soil erosion rate on Mongolian grassland ......10

Measurements of the Total Reaction Cross Sections for 6,8^{6,8}He and 8,9^{8,9}Li Nuclei with Energies of (25-45)A Mev on nat^{nat}Al, nat^{nat}Ta and nat^{nat}Pb

International audienceThe total nuclear reaction cross sections (σR) measurements have long been of interest since they tell us about the radii and transparency of these nuclei and give clues to understanding of their structure. For studies of unstable nuclei, in particular the physical properties of halo nuclei and the neutron skin thickness, it is valuable to know not only the root-mean-square radii (rms) but it is important to know the details of nucleusnucleus potentials. Our goal was to study total reaction cross sections (σR) by a direct measurement technique (the so-called beam attenuation or transmission method) which allows to extract model independent information. The interaction radii for 6He, 8,9Li were extracted, which are in agreement with the previous measurement at the similar energies (about a few tens of AMeV) Our results show a tendency of increasing radii as function of mass of the secondary targets