Asymptotic of the flow in the neighborhood of a center during collapse of a spherical cavity

use of the resul ts of [4]: p=368 kbar, D=5.15 k m / s e c , u=0.80 km/ sec , P0=8.93 g / c m 3. A flying indicator was used for better observat ion of the motion of the surface. It was made of copper foil with a thickness of 0.03 mm and was attached to the sample surface by rubbing it on VM-4 oil. The measurements were ca r r i ed out with an $1-24 osci l loscope. The supply source was a 10-~uF capaci tor , which was discharged into the sensing element c i rcu i t with a l imiting res i s tance R = 4 0 0 ~ . T h e initial res is tance of the elements in the test was 10-12 ft.