scholarly journals Institute of Geological Sciences Radiocarbon Dates III

Radiocarbon ◽  
1972 ◽  
Vol 14 (2) ◽  
pp. 331-335 ◽  
Author(s):  
E. Welin ◽  
L. Engstrand ◽  
S. Vaczy
Keyword(s):  
Standard Deviation ◽  
Half Life ◽  
Radiocarbon Dates ◽  
Counting Statistics ◽  
Geological Sciences

This date list was compiled by the Institute of Geological Sciences (U.K.) incorporating data supplied under contract by E. Welin, Radioactive Dating Laboratory, Stockholm. Unless otherwise stated, age figures are in C14 years before a.d. 1950. The half-life of C14 is taken as 5568 years and the error, based on counting statistics of sample, background, and modern, is given as one standard deviation. Correction for C13/C12 fractionation has not been made.

scholarly journals Institute of Geological Sciences Radiocarbon Dates V

Radiocarbon ◽  
1974 ◽  
Vol 16 (1) ◽  
pp. 95-104 ◽  
Author(s):  
E Welin ◽  
L Engstrand ◽  
S Vaczy
Keyword(s):  
Standard Deviation ◽  
Half Life ◽  
Radiocarbon Dates ◽  
Counting Statistics ◽  
Geological Sciences

This date list was compiled by the Institute of Geological Sciences (UK) incorporating data supplied under contract by E Welin, Radioactive Dating Laboratory, Stockholm. Unless otherwise stated, age figures are in 14C years before ad 1950. The half-life of 14C is taken as 5568 years and the error, based on counting statistics of sample, background, and modern, is given as one standard deviation. Correction for 13C/12C fractionation has been made.

scholarly journals Institute of Geological Sciences Radiocarbon Dates VI

Radiocarbon ◽  
1975 ◽  
Vol 17 (2) ◽  
pp. 157-159 ◽  
Author(s):  
E Welin ◽  
L Engstrand ◽  
S Vaczy
Keyword(s):  
Standard Deviation ◽  
Half Life ◽  
Radiocarbon Dates ◽  
Counting Statistics ◽  
Geological Sciences

This date list was compiled by the Institute of Geological Sciences (UK) incorporating data supplied under contract by E Welin, Radioactive Dating Laboratory, Stockholm. Unless otherwise stated, age figures are in 14C years before AD 1950. The half-life of 14C is taken as 5568 years and the error, based on counting statistics of sample, background, and modern, is given as one standard deviation. Correction for 13C/12C fractionation has been made.

scholarly journals Institute of Geological Sciences Radiocarbon Dates IV

Radiocarbon ◽  
1973 ◽  
Vol 15 (2) ◽  
pp. 299-302 ◽  
Author(s):  
E. Welin ◽  
L. Engstrand ◽  
S. Vaczy
Keyword(s):  
Standard Deviation ◽  
Half Life ◽  
Radiocarbon Dates ◽  
Counting Statistics ◽  
Geological Sciences

This date list was compiled by the Institute of Geological Sciences (U.K.) incorporating data supplied under contract by E. Welin, Radioactive Dating Laboratory, Stockholm. Unless otherwise stated, age figures are in C14 years before a.d. 1950. The half-life of C14 is taken as 5568 years and the error, based on counting statistics of sample, background, and modern, is given as one standard deviation. Correction for C13/C12 fractionation has not been made.

scholarly journals University of Wisconsin Radiocarbon Dates VII

Radiocarbon ◽  
1970 ◽  
Vol 12 (1) ◽  
pp. 335-345 ◽  
Author(s):  
Margaret M. Bender ◽  
Reid A. Bryson ◽  
David A. Baerreis
Keyword(s):  
Standard Deviation ◽  
Half Life ◽  
Wood Charcoal ◽  
Radiocarbon Dates ◽  
University Of Wisconsin ◽  
Background Sample ◽  
Counting Statistics ◽  
Lake Cores

The radiocarbon dates obtained since August, 1968, are reported here. Wood, charcoal, and peat samples are pretreated with dilute NaOH and dilute H3PO4 before conversion to the methane used as counting gas; marls and lake cores are treated with acid only. The reported dates have been calculated using 5568 years as the half-life of C14, 1950 as the reference year. Samples are run at least once in each of two 0.5 liter counters at 3 atm pressure for a minimum total of 15,000 counts. The standard deviation quoted includes only the 1σ of the counting statistics of background, sample, and standard counts.

scholarly journals Institute of Geological Sciences Radiocarbon Dates II

Radiocarbon ◽  
1972 ◽  
Vol 14 (1) ◽  
pp. 140-144 ◽  
Author(s):  
E. Welin ◽  
L. Engstrand ◽  
S. Vaczy
Keyword(s):  
Standard Deviation ◽  
Standard Error ◽  
Half Life ◽  
Radiocarbon Dates ◽  
Geological Sciences

This date list was compiled by the Institute of Geological Sciences (U.K.) incorporating data supplied under contract by E. Welin, Radioactive Dating Laboratory, Stockholm. Unless otherwise stated, age figures are in C14 years before A.D. 1950. The half-life of C14 is taken as 5568 and the standard error is given as a standard deviation of 1σ. Correction for C13/C12 has not been made.

scholarly journals University of Wisconsin Radiocarbon Dates III

Radiocarbon ◽  
1967 ◽  
Vol 9 ◽  
pp. 530-544 ◽  
Author(s):  
Margaret M. Bender ◽  
Reid A. Bryson ◽  
David A. Baerreis
Keyword(s):  
Standard Deviation ◽  
Half Life ◽  
Radiocarbon Dates ◽  
University Of Wisconsin ◽  
Background Sample ◽  
Counting Statistics ◽  
The University

This report summarizes the radiocarbon dates obtained at the University of Wisconsin since November, 1965; the procedures followed and equipment used have been described previously (Wisconsin II).The dates reported have been calculated on the assumption of a half-life of 5568 yr for C14, 1950 as the reference year. Samples have normally been run at 3 atm pressure for a minimum of 15,000 counts. The standard deviation quoted includes only the 1σ of the counting statistics of background, sample, and standard counts.

scholarly journals Institute of Geological Sciences Radiocarbon Dates I

Radiocarbon ◽  
1971 ◽  
Vol 13 (1) ◽  
pp. 26-28 ◽  
Author(s):  
E. Welin ◽  
L. Engstrand ◽  
S. Vaczy
Keyword(s):  
Standard Deviation ◽  
Standard Error ◽  
Half Life ◽  
Radiocarbon Dates ◽  
Geological Sciences

This date list was compiled by the Institute of Geological Sciences (U.K.) incorporating data supplied under contract by Dr. E. Welin, Radioactive Dating Laboratory, Stockholm. Unless otherwise stated age figures are in C14 years before A.D. 1950. The half-life of C14 is taken as 5568 years and the standard error is given as a standard deviation of 1σ. Correction for C13/C12 has not been made. This is the first of a series of annotated lists of C14 dates of British and overseas material in course of preparation by the Institute.

scholarly journals University of Lund Radiocarbon Dates XVII

Radiocarbon ◽  
1984 ◽  
Vol 26 (3) ◽  
pp. 392-411 ◽  
Author(s):  
Sören Håkansson
Keyword(s):  
Standard Deviation ◽  
Oxalic Acid ◽  
Half Life ◽  
Radiocarbon Dates ◽  
Counting Statistics

Most of the 14C measurements reported here were made between October 1982 and October 1983. Equipment, measurement, and treatment of samples are as reported previously (R, 1968, v 10, p 36–37; 1976, v 18, p 290; 1980, v 22, p 1045).Age calculations are based on a contemporary value equal to 95% of the activity of NBS oxalic acid standard (No. 4990A) and on the conventional half-life for 14C of 5568 yr. Results are reported in years before 1950 (years bp). Errors quoted with the dates are based on counting statistics alone and are equivalent to ± 1 standard deviation (±σ).

scholarly journals University of Wisconsin Radiocarbon Dates V

Radiocarbon ◽  
1968 ◽  
Vol 10 (2) ◽  
pp. 473-478 ◽  
Author(s):  
Margaret M. Bender ◽  
Reid A. Bryson ◽  
David A. Baerreis
Keyword(s):  
Standard Deviation ◽  
Half Life ◽  
Radiocarbon Dates ◽  
University Of Wisconsin ◽  
Background Sample ◽  
Counting Statistics

The radiocarbon dates obtained since August, 1967 are included in this report. The procedures followed have been described previously (Wisconsin II).The reported dates have been calculated using 5568 as the half-life of C14, 1950 as the reference year. Samples are run at least once in each of two counters at 3 atm pressure for a minimum of 15,000 counts. The standard deviation quoted includes only the 1σ of the counting statistics of background, sample, and standard counts.

scholarly journals Florence Radiocarbon Dates III

Radiocarbon ◽  
1977 ◽  
Vol 19 (2) ◽  
pp. 165-169 ◽  
Author(s):  
C M Azzi ◽  
L Bigliocca ◽  
F Gulisano
Keyword(s):  
Standard Deviation ◽  
Half Life ◽  
Radiocarbon Dates ◽  
Counting Statistics ◽  
Italian Territory

This list comprises age measurements carried out from January 1976 to July 1976. Dated samples are all of archaeologic interest, from Italian territory. Pretreatment of samples, production of purest CO2 and counting techniques have been described elsewhere (Azzi, 1972; Azzi et al, 1973; Azzi et al, 1974). Ages of samples are calculated using the conventional half-life of 5570 ± 30 yr and refer to 1950. Errors are stated in terms of one standard deviation of counting statistics.

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