2019 Physics/Theoretical Colloquium Thursday, December 5th , 2019 3:45 – 4:45 p.m. Rosen Auditorium (TA-53, Bldg. 001) Refreshments at 3:15pm Speaker: Dr. William T. Buttler P-23: NEUTRON SCIENCE & TECHNOLOGY Los Alamos National Laboratory “Understanding ejecta transport, breakup and conversion processes” Abstract: We studied ``ejecta transport, breakup and conversion processes'' under LDRD 20170082DR. The proposal was based on the hypothesis that chemically reactive ejecta transporting in a reactive gas, such as D2 will rapidly break up into smaller fragments in situations where they are otherwise hydrodynamically stable in a nonreactive gas, such as He.} The three years of research were characterized by discovery, and we established the hypothesis. I will present the key results that established the hypothesis, other results, and an important discovery about ejecta size- and mass-velocity distributions that the entire world has missed.