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Proposal for an Experiment at the National Accelerator Laboratory Nuclear Levels as Analyzers of High Energy Interactions

Description: We propose to study diffractive phenomena caused by 100 BeV pions, using a new technique, which consists in associating with the high energy interaction, the detection of photons resulting from the de-excitation of nuclear levels. Knowledge of the quantum numbers both for the ground state and the nuclear levels of the nuclei used, adds information as to the type of interaction. In particular, the use of the 4.4 MeV level of Carbon guarantees that the exchange quantum has isotopic spin 0. In add… more
Date: June 6, 1972
Creator: Babcock, B.; Kirk, P.; Marraffino, J.; Mehlhop, W.; Murty, S.; Piccioni, O. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Vulcanism and Radiocarbon Dates

Description: We consider whether the long term perturbation of radiocarbon dates, which is known to be approximately a sin function of period about 8000 years and amplitude of about 8% peak-to-peak, could have been caused in any major part by vulcanism. We conclude that this is not the case. On the contrary, present day volcanoes are a far less important source of inert CO{sub 2} (about 100 fold less) than is man's burning of fossil fuels which has caused the Suess dilution of about 2%. (auth)
Date: January 1, 1972
Creator: Libby, L. M. & Libby, W. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Radiocarbon dating, memories, and hopes

Description: The history of radiocarbon dating from 1939 to the present is reviewed. The basic principles of radiocarbon dating are that cosmic rays make living things radioactive with {sup 14}C to a certain level fixed by the environment and that at death the intake of food stops so no replenishment of the {sup 14}C steadily lost by the immutable decay occurs. Therefore measurement of the degree of decay gives the time lapse since death, i.e., the radiocarbon age. The equipment developed and experiments pe… more
Date: January 1, 1972
Creator: Libby, W.F.
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Partner: UNT Libraries Government Documents Department
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