scanning proton microprobe

scanning proton microprobe

[′skan·iŋ ′prō‚tän ′mī·krə‚skōp]
(engineering)
An instrument used for determining the spatial distribution of trace elements in samples, in which a beam of energetic protons is focused on a narrow spot which is swept over the sample, and the characteristic x-rays emitted from the target are measured.
References in periodicals archive ?
Scanning proton microprobe analysis of strontium in an arctic charr, Salvelinus alpinus, otolith: Implications for the interpretation of anadromy.
Scanning proton microprobe analysis was used to determine the distribution of strontium (Sr) in otoliths from arctic charr (Salvelinus alpinus) of known non-anadromous, known anadromous, and unknown life histories.
Key words: anadromy, arctic charr, Salvelinus alpinus, Ellesmere Island National Park Reserve, life history, otolith microchemistry, scanning proton microprobe, trace elements
(1991) suggested that scanning proton microprobe (SPM) analysis of Sr distribution in otoliths could be used to detect anadromous behaviour in fishes, and in preliminary studies, we have demonstrated that SPM analysis of the Sr content of charr otolith annuli can be used to characterize anadromous behaviour (Halden et al., 1995, 1996).
Scanning proton microprobe transects across the otoliths of known non-anadromous arctic charr showed a pattern consistent with predicted results for a fish with a non-migratory life history.
Full browser ?