No abstract

This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employecs, makes any warranty, expras or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement. m mmendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

This report was prepared as an actnunt of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employes, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed. or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, r mmendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect thost of the United States Government or any agency thereof.

No abstract

Abstract.Here we present the results for experiments of gaseous helium with an initial density of 0.019 g/cm 3 cylindrically compressed. The cylindrical compression technique transforms shock compression to quasi-isentropic compressions. The resulting pressures attained were from 130 to 460 GPa with compressed densities of 1.3 to 2.3 g/cm 3 for a compression ratio ( 0 δ = ρ ρ ) from 70 to 115.The density of the gas was determined from X-ray radiography based on the boundary location of the steel liners, which compressed the gas. The pressures Gas density was determined by the X-ray radiography method basing on location of boundaries of the steel shells, which compressed gas. Pressures were based upon gas-dynamic calculations.