In:
Radiocarbon, Cambridge University Press (CUP), Vol. 5 ( 1963), p. 34-38
Abstract:
The dating equipment at the National Physical Laboratory was completed by the summer of 1960. A series of calibration and intercomparison measurements was undertaken however, using the NBS oxalic acid reference standard, a modern wood standard (1850 oak tree) and other material before starting routine measurements toward the end of 1961. All results have been obtained using a 4.5 L copper proportional counter filled with CO 2 at a constant density corresponding to standard conditions of 22°C and an absolute pressure of 150 cm Hg. The counter is shielded by 8 in. of steel, 6 in. of paraffin wax containing boric oxide, 23 Geiger counters arranged as two independent groups and finally by 1 in. of mercury.
Type of Medium:
Online Resource
ISSN:
0033-8222
,
1945-5755
DOI:
10.1017/S0033822200036766
Language:
English
Publisher:
Cambridge University Press (CUP)
Publication Date:
1963
detail.hit.zdb_id:
2028560-7
SSG:
11
SSG:
13
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