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001-es BibID:	BIBFORM060933
Első szerző:	Molnár Mihály (fizikus)
Cím:	C-14 analysis of groundwater down to the millilitre level / Mihály Molnár, Irka Hajdas, Róbert Janovics, László Rinyu, Hans-Arno Synal, Mihály Veres, Lukas Wacker
Dátum:	2013
ISSN:	0168-583X
Megjegyzések:	Two new methods for the sample preparation of groundwater for C-14 measurements with acceleratormass spectrometry (AMS) were developed and tested. Both methods are simple and do not require vacuumfor the extraction of CO2 from water. A double needle with flow controlled He carrier gas is used forair flushing out before the reaction and also for the CO2 transfer out from the septa sealed reactor testtube. The extracted CO2 was either graphitized or directly measured with an AMS equipped with a gasion source.The processing blank and the reproducibility of the applied methods are satisfactory and allow precisegroundwater C-14 analyses. The feasibility of field sampling directly into the reaction tubes was demonstratedusing very old (1?20 pMC) groundwater samples. The C-14 content of as little as 1 mL of watersample could be measured with 1% precision (for a modern sample) within 20 min with the gas ionsource of a MICADAS type AMS system. The preparation of the samples can be performed while measurementsare already running and therefore require no additional time.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Nuclear Instruments & Methods In Physics Research Section B-Beam Interactions With Materials And Atoms. - 294 (2013), p. 573-576. -
További szerzők:	Hajdas Irka Janovics Róbert (1984-) (környezetkutató) Rinyu László (fizikus) Synal, Hans-Arno Veres Mihály (fizikus) Wacker, Lucas (1956-) (Fizikus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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