Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

Data used to plot figures in the article "Gas cell studies of thorium using filament dispensers at IGISOL". Please see the file names for further information. Countrate are not necessarily cps.

TR-mmWC signal was obtained for gamma, proton and chlorine ion irradiated silicon samples. The millimeter wave signals were collected once in transmission mode and another time in reflection mode using the same detector responsivity. The CSV files have delay time and voltage columns. The laser pulse was repeated every 1 millisecond and approximately 4096 averages were done for the transient signal prior to storage.

129I concentrations and 129I/127I ratios for three cores from Lake Ontario sediments are provided here.

129I in Lake Ontario sediments

129I/127I ratios in Lake Ontario sediments

avalible online

This dataset includes all the data used in the article "Total-IBA Accuracy" (Nuclear Instruments & Methods). Data were collected in Surrey 14-15 December 2018, using OMDAQ. The OMDAQ list mode files are included. The data were analysed by DataFurnace. Please see the document (*.docx) for an Index into the contents.

Contributors: Roberta Guerra, Francisco-Javier Santos Arévalo, Rafael García-Tenorio Date: 2019-03-22 Description: A Carbonate Handling System (CHS from Ionplus AG) coupled with an automated graphitization system (AGE from Ionplus AG) has been tested to investigate the potential for running samples of foraminiferal carbonate for AMS 14C dating at the Centro Nacional de Aceleradores (CNA) in Seville. The reproducibility of 14C ages for blanks and standard materials indicates that reliable 14C analyses are achievable for carbonate samples with a 14C age up to 50,000 yr BP. 14C and δ13C measurements of monospecific plankic foraminifera and bulk carbonate from sediment cores collected during the VECTOR oceanographic cruise (TRANSMED) in Western and Eastern Mediterranean Sea are presented. Monospecific planktonic foraminifera younger than 1000 yr BP from the deep Mediterranean Sea were dated with a MIni CArbon DAting System (MICADAS) at the CNA.

We are investigated the effect of chemical binding on the validity of Bragg’s rule for the calculation of stopping cross sections and mean excitation energies. As test cases we use a series of small molecules and molecular ions, primarily carbon and nitrogen halides. We find that neglect of chemical binding nearly always reduces the mean excitation energies and that the fully atomic decomposition of any molecule but a diatomic molecule never gives the best fulfilment of Bragg’s rule. The best fulfilment of Bragg’s rule is obtained when as few bonds as possible are broken and when the choice of fragments is guided by chemical knowledge. By investigating several alternative fragmentation patterns for a molecule, guidelines for choice of optimal fragmentation are suggested.

Provided is the following: (1) Monte Carlo-calculated (PENELOPE [v. 2014]) K and L x-ray fluorescence differential in electron penetration depth scaled by the continuous slowing down approximation (CSDA) range. (2) Radiative transition data and photon mass attenuation coefficients extracted from the PENELOPE materials database. (3) An example MATLAB code that implements the provided data in an analytical model for the prediction of characteristic x-ray emission from a thick tungsten target.