A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Time-gated Raman and laser-induced breakdown spectroscopy in mapping of eudialyte and catapleiite (2020)


Romppanen, S., Häkkänen, H., Kekkonen, J., Nissinen, J., Nissinen, I., Kostamovaara, J., & Kaski, S. (2020). Time-gated Raman and laser-induced breakdown spectroscopy in mapping of eudialyte and catapleiite. Journal of Raman Spectroscopy, 51 (9), 1462-1469. doi:10.1002/jrs.5622


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Romppanen, Sari; Häkkänen, Heikki; Kekkonen, Jere; Nissinen, Jan; Nissinen, Ilkka; Kostamovaara, Juha; Kaski, Saara

Lehti tai sarja: Journal of Raman Spectroscopy

ISSN: 0377-0486

eISSN: 1097-4555

Julkaisuvuosi: 2020

Volyymi: 51

Lehden numero: 9

Artikkelin sivunumerot: 1462-1469

Kustantaja: John Wiley & Sons Ltd.

Julkaisumaa: Britannia

Julkaisun kieli: englanti

DOI: http://doi.org/10.1002/jrs.5622

Avoin saatavuus: Julkaisukanava ei ole avoin

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/67133

Lisätietoja: Special Issue: GeoRaman 2018.


Tiivistelmä

Raman analysis of rock samples containing rare earth elements (REEs) is challenging due to the strong fluorescence, which may mask the weaker Raman signal. In this research, time‐gated (TG) Raman has been applied to the construction of the mineral distribution map from REE‐bearing rock. With TG Raman, material is excited with a short subnanosecond laser pulse, and the Raman signal is collected within a picosecond‐scale time window prior to the formation of a strong fluorescent signal by means of single‐photon avalanche diode array. This allows signal readout with a significantly reduced fluorescence background. TG Raman maps are used to reveal the location of valuable minerals and are compared with the elemental distribution given by laser‐induced breakdown spectroscopy. The analysis was carried out from a REE‐bearing rock, nepheline syenite sample from the Norra Kärr deposit, where REEs are mainly hosted in eudialyte and catapleiite. The combination of these two complimentary laser spectroscopic methods offers valuable elemental and mineralogical information about rocks.


YSO-asiasanat: spektroskopia

Vapaat asiasanat: laser-induced breakdown spectroscopy (LIBS); mineral mapping; REE&-bearing minerals; rock analysis; time-gated Raman


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OKM-raportointi: Kyllä

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Viimeisin päivitys 2020-18-10 klo 21:45