thermal ionization mass spectroscopy  search
BTspectroscopy
 .mass spectroscopy
 ..thermal ionization mass spectroscopy
RTabsolute age
 heat flow
 Thermal Infrared Multispectral Scanner
 uranium disequilibrium
SNBefore 1998, also search TIMS and (spectroscopy or absolute age). For the method. For data, use thermal ionization mass spectra. Added to Thesaurus in 1998.