In:
Radiocarbon, Cambridge University Press (CUP), Vol. 54, No. 2 ( 2012), p. 187-193
Kurzfassung:
A sample with a radiocarbon concentration estimated to be greater than 10 5 times Modern was inadvertently graphitized and measured in the Xi'an AMS system last year. Both the sample preparation lines and the ion source system were seriously contaminated and a series of cleaning procedures were carried out to remove the contamination from them. After repeated and careful cleaning as well as continuous flushing with dead CO 2 gas, both systems have recovered from the contamination event. The machine background is back to 2.0 x 10 –16 and the chemical blank is beyond 50 kyr.
Materialart:
Online-Ressource
ISSN:
0033-8222
,
1945-5755
DOI:
10.2458/azu_js_rc.v54i2.16045
Sprache:
Englisch
Verlag:
Cambridge University Press (CUP)
Publikationsdatum:
2012
ZDB Id:
2028560-7
SSG:
11
SSG:
13