Ultra High Sensitivity Magnetic Sector SIMS for Geosciences
The CAMECA IMS 1280-HR is a large geometry ion microprobe delivering unequalled analytical
performance for a wide range of applications: tracking geological processes using stable
isotopes, dating minerals, determining the presence of trace elements, screening and analysing large numbers of particles...
New high mass resolution capabilities
The new IMS 1280-HR model combines the well-proven features of the
former IMS 1280 with new developments oriented toward specific geoscience applications requiring very high mass resolution
capabilities in both mono and multicollection modes.
Main targeted applications are K/Ca and Rb/Sr dating in
monocollection mode at Mass Resolving Power (MRP) > 20,000, as
well as Mg and metal isotope analysis in multicollection mode at MRP > 5,000.
These superior capabilities open the path to a whole new type of scientific
investigations in geological sciences.
Transmission at very high mass resolution (monocollection) in Adularia is shown
on the left. A 40K transmission > 75 c/s/ppm/nA could be achieved at MRP (10%) ~ 34,000.
Ultimate performance for in situ isotope analysis
High density cesium or
oxygen primary ion beam
bombardment combined with optimized
transmission allow high precision
stable isotope studies and analysis of
trace elements at high sensitivity (e.g.
mandatory for Pb analyses in Zircon).
The IMS 1280-HR multicollector system
ensures ultimate reproducibility for
stable isotope ratio measurements (H, C,
O, S, Li, B, Mg...) and significantly
increases the throughput of the
instrument by reducing the total
Unique imaging capabilities
The IMS 1280-HR is the only large geometry ion microprobe performing
both microscope and microprobe imaging. Thanks to these superior imaging capabilities, the
IMS 1280-HR is able to map the distribution of major, minor and trace elements or isotopes at
sub-micron lateral resolution.
On the left (Image 1): Particule screening in microprobe mode (scanning ion image).
2x3μm analysis pits on polished foraminiferal cross sections, and corresponding δ18O values.
Courtesy of WiscSIMS lab, Univ. of Wisconsin, USA.
Particule screening in microprobe mode
(scanning ion image).