Radiofluorescence

A technique for dosimetric dating of potassium feldspar to establish sedimentation ages.

Radiofluorescence

IR-RF ages (squares) being in agreement with ESR-US ages (circles) for sands from the type locality of Homo heidelbergensis (from Wagner et al., 2010)

Infrared-Radiofluorescence (IR-RF) is a technique for dosimetric dating of potassium feldspar to establish sedimentation ages. This method avoids some of the problems of other trapped-charge techniques, which employ the signal from recombination, by measuring the IR-signal from an electron capture at luminescence traps during ionization.

  • High saturation dose allows dating up to ca. 600 ka

  • No fading or electron competition

  • Simple single-aliquot regenerative (IR-SAR) procedure (Krbetschek & Erfurt 2003)

Buylaert JP, Jain M, Murray AS, Thomsen KJ & Lapp T (2012) IR-RF dating of sand-sized K-feldspar extracts: A test of accuracy. Radiation Measurements 47, 759-765.

Erfurt G & Krbetschek MR (2003) IRSAR - A single-aliquot regenerative-dose dating protocol applied to the infrared radiofluorescence (IR-RF) of coarse-grain K-feldspar. Ancient TL 21, 35.

Wagner GA, Krbetschek M, Degering D, Bahain J-J, Shao Q, Falguères C, Voinchet P, Dolo J-M, Garcia T & Rightmire GP (2010) Radiometric dating of the type-site for Homo heidelbergensis at Mauer, Germany. Proceedings of the National Academy of Sciences 107, 19726-19730.