S P H T Freeman

Biographic Data

ID5597123
NAMES P H T Freeman
GIVEN NAMESS P H T
FAMILY NAMEFreeman
SIGNATUREFREEMAN S P H T
VERIFIEDNo
TOTAL WORKS6
TOTAL CITATIONS36
WORKS AS AUTHOR6
WORKS AS EDITOR0
FIRST PUBLICATION YEAR2007
LATEST PUBLICATION YEAR2024
H-INDEX3

  • A Database of Nerc Radiocarbon Measurements Determined by Accelerator Mass Spectrometry

    Open AccessM H Garnett, C L Bryant et al.ARTICLERadiocarbon2024References: 14

    Radiocarbon ( 14 C) measurements undertaken by the NERC Radiocarbon Laboratory using accelerator mass spectrometry (AMS) are now freely available on a new online database. The data presented covers measurement of the wide range of sample types that are processed for research projects in the fields of Earth and environmental science, supported by the United Kingdom’s Natural Environment Research Council. Sample types within the database include or…

  • Informing Conservation

    Open AccessA Bayliss, P Marshall et al.ARTICLERadiocarbon2017Cited by: 13References: 20

    This study tested whether accurate dating by accelerator mass spectrometry (AMS) radiocarbon wiggle-matching of short tree-ring series (~30 annual rings) in the Medieval period could be achieved. Scientific dating plays a central role in the conservation of historic buildings in England. Precise dating helps assess the significance of particular buildings or elements of their fabric, thus allowing us to make informed decisions about their repair …

  • Assessment of Infinite-Age Bones from the Upper Thames Valley, UK, as 14C Background Standards

    G T Cook, T F G Higham et al.ARTICLERadiocarbon2012References: 4

    It is becoming increasingly clear that in order to generate accurate radiocarbon dates for bone collagen samples it is important to determine a sample-specific background correction to account for the greater complexity and higher number of steps in the pretreatment chemistry of this material. To provide suitable samples for the 14 C community, 7 bone samples were obtained from contexts within British gravel quarries, which according to other dat…

  • Assessment of Infinite-Age Bones from the Upper Thames Valley, UK, as 14 C Background Standards

    Open AccessG T Cook, T F G Higham et al.ARTICLERadiocarbon2012Cited by: 7References: 29

    It is becoming increasingly clear that in order to generate accurate radiocarbon dates for bone collagen samples it is important to determine a sample-specific background correction to account for the greater complexity and higher number of steps in the pretreatment chemistry of this material. To provide suitable samples for the 14 C community, 7 bone samples were obtained from contexts within British gravel quarries, which according to other dat…

  • C AMS at Suerc

    Open AccessP Naysmith, G T Cook et al.ARTICLERadiocarbon2010Cited by: 15References: 5

    In 2003, a National Electrostatics Corporation (NEC) 5MV tandem accelerator mass spectrometer was installed at SUERC, providing the radiocarbon laboratory with 14 C measurements to 4–5‰ repeatability. In 2007, a 250kV single-stage accelerator mass spectrometer (SSAMS) was added to provide additional 14 C capability and is now the preferred system for 14 C analysis. Changes to the technology and to our operations are evident in our copious quality…

  • Radiocarbon and Blue Optically Stimulated Luminescence Chronologies of the Oitavos Consolidated Dune (Western Portugal)

    Open AccessM I Prudêncio, R Marques et al.ARTICLERadiocarbon2007Cited by: 1References: 5

    The dune of Oitavos, the underlying paleosol, and Helix sp. gastropod shells found within the paleosol were dated using a combination of radiocarbon and blue optically stimulated luminescence (OSL). The organic component of the paleosol produced a significantly older age (∼20,000 cal BP) than the OSL age measurement (∼15,000 yr), while 14 C age measurements on the inorganic component and the gastropods produced ages of ∼35,000 yr and ∼34,000 yr, …