Physics
Scientific paper
Jan 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976rock.rept.....t&link_type=abstract
Annual Report Rockwell International Corp., Thousand Oaks, CA. Science Center.
Physics
Lunar Geology, Lunar Rocks, Acoustic Velocity, Basalt, Internal Friction, Outgassing, Temperature Effects, Ultrahigh Vacuum
Scientific paper
Room temperature internal friction (Q sup-1) values of the 0.00002-0.00003 range were achieved with lunar rock 70215,85 by thorough outgassing procedures in ultrahigh vacuum. Results are presented on the temperature dependence of Q-1 as measured in the range 25 C to 600 C along with some data on the change in Q-1 with pressure in ultrahigh vacuum. The temperature dependence shows the existence of an internal friction peak at around 200 C followed at high temperatures by an extensive region with flat Q-1 (approximately 0.001); the work at ultrahigh vacuum shows decreases in the internal friction with decreases in ambient pressure even in the range 10 to the -8 to 10 to the -10 power torr.
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