scholarly journals University of Granada Radiocarbon Dates VI

Radiocarbon ◽  
1992 ◽  
Vol 34 (1) ◽  
pp. 133-139 ◽  
Author(s):  
Cecilio Gonzalez-Gomez
Keyword(s):  
Radiocarbon Dating ◽  
Boiling Temperature ◽  
Radiocarbon Dates ◽  
Standard Acid ◽  
Basic Procedure ◽  
The University

This paper includes determinations of archaeological, geological, palaeobotanical and other samples from Spain, Portugal and Bolivia, measured at the University of Granada Radiocarbon Dating Laboratory, mostly from 1989 to 1990. Pretreatment of charcoal and wood samples is a standard acid-basic procedure using 8% HCl and 2% NaOH at boiling temperature. We obtain collagen from bone samples using the Longin (1971) method.

scholarly journals University of Granada Radiocarbon Dates V

Radiocarbon ◽  
1991 ◽  
Vol 33 (3) ◽  
pp. 367-373 ◽  
Author(s):  
Cecilio Gonzalez-Gomez ◽  
Purificacion Sanchez-Sanchez
Keyword(s):  
Liquid Scintillation Counting ◽  
Radiocarbon Dating ◽  
Liquid Scintillation ◽  
Scintillation Counting ◽  
Boiling Temperature ◽  
Liquid Scintillation Spectrometer ◽  
Radiocarbon Dates ◽  
Standard Acid ◽  
Basic Procedure ◽  
The University

This paper includes some determinations of archaeological, art and palaeobotanical samples from Spain and Portugal, obtained at the University of Granada Radiocarbon Dating Laboratory, mostly from 1986 to 1988. Pretreatment of charcoal and wood samples is a standard acid-basic procedure using 8% HC1 and 2% NaOH at boiling temperature. The collagen of bone samples is obtained by the Longin (1971) method.The method of dating is benzene synthesis and liquid scintillation counting as previously reported (González-Gómez, López-González & Domingo-García 1982; González-Gómez, Sánchez-Sánchez and Domingo-García 1985; González-Gómez, Sánchez-Sánchez and Villafranca-Sánchez 1986, 1987).14C activity was measured in a Packard Tri-Carb Mod 4640 liquid scintillation spectrometer, using 20 ml low 40K counting vials with 5 ml benzene and 10 ml PPO-toluene as scintillator with a background of ca. 9 cpm. Efficiency was approximately 70% using the part of spectrum above the end point of tritium.

scholarly journals University of Granada Radiocarbon Dates VIII

Radiocarbon ◽  
1997 ◽  
Vol 39 (3) ◽  
pp. 299-303
Author(s):  
Cecilio González-Gómez ◽  
Elena Villafranca-Sánchez
Keyword(s):  
Liquid Scintillation Counting ◽  
Radiocarbon Dating ◽  
Liquid Scintillation ◽  
Scintillation Counting ◽  
Boiling Temperature ◽  
Radiocarbon Dates ◽  
Standard Acid ◽  
Basic Procedure ◽  
The University

This paper includes determinations of archaeological, geological and paleobotanical samples from Spain and Brazil, measured at the University of Granada Radiocarbon Dating Laboratory, mainly from 1991 to 1992. As previously reported (González-Gómez 1992), pretreatment of charcoal and wood samples is a standard acid-basic procedure using 8% HCl and 2% NaOH at boiling temperature. The collagen of bone samples was extracted by the Longin (1971) method. The method of dating is liquid scintillation counting of synthesized benzene.

scholarly journals University of Granada Radiocarbon Dates VII

Radiocarbon ◽  
1997 ◽  
Vol 39 (1) ◽  
pp. 73-77
Author(s):  
Cecilio González-Gómez ◽  
Elena Villafranca-Sánchez
Keyword(s):  
Liquid Scintillation Counting ◽  
Radiocarbon Dating ◽  
Liquid Scintillation ◽  
Scintillation Counting ◽  
Boiling Temperature ◽  
Radiocarbon Dates ◽  
Standard Acid ◽  
Basic Procedure ◽  
The University

This paper includes determinations of archaeological, geological and palaeobotanical samples from Spain and Portugal, measured at the University of Granada Radiocarbon Dating Laboratory, from 1990 to 1991. Pretreatment of charcoal and wood samples is a standard acid-basic procedure using 8% HCl and 2% NaOH at boiling temperature. The collagen of bone samples is obtained by the Longin (1971) method. The method of dating is benzene synthesis and liquid scintillation counting.

scholarly journals Frankfurt Radiocarbon Dates I

Radiocarbon ◽  
1984 ◽  
Vol 26 (2) ◽  
pp. 185-195 ◽  
Author(s):  
Reiner Protsch ◽  
Bernhard Weninger
Keyword(s):  
Amino Acid ◽  
Proportional Counter ◽  
Radiocarbon Dating ◽  
Radiocarbon Dates ◽  
Lead Shield ◽  
Standard Acid ◽  
Ring Counter ◽  
The University ◽  
Story Building ◽  
Amino Acid Dating

Facilities for radiocarbon dating were established at the University of Frankfurt/Main in the Institute of Anthropology. The Radiocarbon Laboratory provides assistance to the Amino-Acid-Dating Laboratory. This list reports on 14C dates measured up to September 1983.The laboratory is installed in the basement of a three-story building and is equipped with a 2L copper proportional counter filled to 1013 mbar with purified CO2. The counter is protected against cosmic and surrounding radiation by a 3.5 ton lead shield and a copper multiwire anticoincidence ring-counter flushed with purified 90Ar/10CH4. Electronics are of the commercial NIM type. Charcoal and wood samples are treated by standard acid-alkali-acid methods. Bone samples are treated according to the collagen methods described by Berger, Horney, and Libby (1964), Longin (1971), Protsch (1972; 1975), and Protsch and Berger (1973).

Radiocarbon Dates from Bosumpra Cave, Abetifi, Ghana

1975 ◽  
Vol 41 ◽  
pp. 179-182 ◽  
Author(s):  
Andrew B. Smith
Keyword(s):  
West Africa ◽  
Organic Material ◽  
Radiocarbon Dating ◽  
Analytical Description ◽  
Radiocarbon Dates ◽  
Moist Forest ◽  
Forest Regions ◽  
Marginal Forest ◽  
The University ◽  
University Of Ghana

In 1940 Professor Thurstan Shaw excavated a trench in the cave known as Bosumpra at Abetifi (6° 41′N:0° 44′W) on the borderline between the moist forest and the northern marginal forest (fig. 1). Bosumpra is one of the four main ‘abosom’ (lesser) gods of the Guan pantheon (Brokenshaw 1966, 156). The report (Shaw, 1944) showed that the cave was formerly inhabited by a people with a pottery-using microlithic culture and provided the first analytical description of the microlithic industries from the forest regions of West Africa. As the site was the first of its kind to be excavated, and the excavation was carried out before the advent of radiocarbon dating, there was no way of knowing what age this industry was, or how long the cave had been occupied, beyond placing it within the rubric of the so-called “Guinea Neolithic”.To attempt to clarify this problem a group of students from the Department of Archaeology at the University of Ghana and myself conducted the excavation of a small witness section (fig. 2) in the cave over New Year 1973/74 with the specific aim of collecting organic material for dating. We were fortunate in finding adequate amounts of charcoal at all levels. Two of these samples were submitted to Rikagaku Kenkyusho, Japan, for dating.

scholarly journals University of Wisconsin Radiocarbon Dates I

Radiocarbon ◽  
1965 ◽  
Vol 7 ◽  
pp. 399-407 ◽  
Author(s):  
Margaret M. Bender ◽  
Reid A. Bryson ◽  
David A. Baerreis
Keyword(s):  
Radiocarbon Dating ◽  
Radiocarbon Dates ◽  
University Of Wisconsin ◽  
The University

A radiocarbon dating laboratory was installed at the University of Wisconsin in 1963 as part of a program of climatic research in which meteorologists, archaeologists, chemists, botanists, limnologists, geologists, and soil scientists are cooperating.

scholarly journals University of Alaska Radiocarbon Dates I

Radiocarbon ◽  
1976 ◽  
Vol 18 (1) ◽  
pp. 1-15 ◽  
Author(s):  
William S Reeburgh ◽  
M Springer Young
Keyword(s):  
Radiocarbon Dating ◽  
Marine Science ◽  
Radiocarbon Dates ◽  
The University

The radiocarbon dating laboratory in the Institute of Marine Science at the University of Alaska was established in the fall of 1968 and became operational a year later. Most of the samples examined have been from Alaska and consist largely of wood and peat.

scholarly journals University of Lund Radiocarbon Dates I

Radiocarbon ◽  
1968 ◽  
Vol 10 (1) ◽  
pp. 36-54 ◽  
Author(s):  
Soren Håkansson
Keyword(s):  
Boric Acid ◽  
Radiocarbon Dating ◽  
Cosmic Ray ◽  
Paraffin Wax ◽  
Radiocarbon Dates ◽  
Proportional Counters ◽  
The University

Plans for a radiocarbon dating laboratory at the University of Lund were initiated by Tage Nilsson and Holger Arbman in 1962. Work was begun in 1964 and at the end of 1965 most of the dating equipment was installed. Dating began in 1966 after careful testing of counting electronics and counters.The dating system has two 1-L copper-walled proportional counters of Östlund-Engstrand construction (for details see Stockholm V. p. 204, Fig. 1) surrounded by 2.5 cm of selected lead, followed by a ring of 23 cosmic-ray Geiger counters (model HZ-100, Zentralwerkstatt Göttingen). On all sides are at least 20 cm of iron. Above and on both long sides of the counters are 10 cm of paraffin wax with about 12% boric acid between the iron layers.

Radiocarbon Dates and New World Chronology

Antiquity ◽  
1961 ◽  
Vol 35 (140) ◽  
pp. 286-291 ◽  
Author(s):  
Geoffrey Bushnell
Keyword(s):  
Radiocarbon Dating ◽  
New World ◽  
Radiocarbon Dates ◽  
The Past ◽  
University Of Cambridge ◽  
The University ◽  
The Impact

It is a commonplace of current archaeology that the publication of radiocarbon dates is revolutionizing our ideas of the past. Dr G. H. S. Bushnell, Curator of the Museum of Archaeology and Ethnology in the University of Cambridge, England, has already published in ANTIQUITY and elsewhere some of his views on the impact of radiocarbon dating on New World chronology. Here he studies the whole problem in detail. He adopts the useful convention of referring to a date already fully published in the Radiocarbon Supplement to the American Journal of Science simply by its laboratory designation and number {thus K-554 is reading no. 554 of the Copenhagen Laboratory), but in some cases, where the date is not fully published, he gives fuller information.

scholarly journals Hawaii Institute of Geophysics Radiocarbon Dates I

Radiocarbon ◽  
1973 ◽  
Vol 15 (1) ◽  
pp. 68-74 ◽  
Author(s):  
R. W. Buddemeier ◽  
T. H. Hufen
Keyword(s):  
Water Resources ◽  
Radiocarbon Dating ◽  
Research Center ◽  
Radiocarbon Dates ◽  
Ground Floor ◽  
Concrete Building ◽  
The University

The radiocarbon dating laboratory of the University of Hawaii was established with joint support of the Hawaii Institute of Geophysics, the Water Resources Research Center, the Department of Chemistry, and the Graduate Division. The laboratory is located in the Hawaii Institute of Geophysics, on the ground floor of a four-story concrete building, and contains two separate radiocarbon counting systems.

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