The Kinetics of the Spin-Conversion of Positronium Measured by β+γ∆E Age-Momentum Correlation

Autor: U. Lauff, Hermann Stoll, Markus Koch, Karin Maier, P. Wesolowski, I. Bilard, G. Duplâtre, Alfred Seeger, J. Ch. Abbé, Janos Major

Publikováno v: Acta Physica Polonica A. 83:349-358

Age-momentum correlation (AMOC) measurements provide time-resolved information on the momentum distribution of annihilating electron— positron pairs through correlated determination of Doppler broadening (SE) of the 511 keV annihilation radiation l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::12f50ac4cdd5e3e807f0c32e0e15452b
https://doi.org/10.12693/aphyspola.83.349

Neutron activation analysis of U, Th, K and Rb in archaeological samples from Guayabo (Costa Rica) prior to thermoluminescent dating

Autor: J. Ch. Abbé, B. Guevara, I. Rossini, T. Tripier, R. Tenorio

Publikováno v: Journal of Radioanalytical and Nuclear Chemistry Letters. 154:173-183

Neutron activation analysis has been applied to evaluate the concentrations of U, Th, K and Rb in archaeological samples in view of precise thermoluminescent (T.L.) dating. The experimental conditions including the timing and the Ge detector characte

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8edef2db9f3fbd685900e4d0c47af176
https://doi.org/10.1007/bf02164091

Beam-based age-momentum correlation studies of positronium spin conversion in paramagnetic solutions and of positron trapping at defects in diamonds

Autor: H. Haricharun, P. Wesolowski, G. Duplâtre, Hermann Stoll, K. Bharuth-Ram, Elias Sideras-Haddad, Karin Maier, Janos Major, J.P.F. Sellschop, Markus Koch, Alfred Seeger, Isabelle Billard, J. Ch. Abbé, U. Lauff, Simon Henry Connell

Publikováno v: Slow Positron Beam Techniques for Solids and Surfaces
Slow Positron Beam Techniques for Solids and Surfaces: International Workshop 5
Slow Positron Beam Techniques for Solids and Surfaces: International Workshop 5, Aug 1992, Jackson Hole, United States. pp.179-189

Correlated measurements of the lifetime and of the Doppler broadening of the 511 keV annihilation radiation of positrons (Age‐Momentum Correlation, AMOC) using an MeV positron beam have become a powerful tool for investigating reactions of positron

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68e4adfbf9251e7c7319d65e1b96a0da
https://doi.org/10.1063/1.45490

Positron lifetime in mordenite

Autor: J. Ch. Abbé, M. Dębowska

Publikováno v: Crystal Research and Technology. 23:291-295

Positron lifetime spectra have been measured for mordenite pure and impregnated with various amounts of metallic gold being highly dispersed. The change of annihilation characteristics (in comparison to those corresponding to the pure mordenite), res

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::92c5f5232fb2cf5953daf7438ea7225d
https://doi.org/10.1002/crat.2170230232

Prompt-gamma neutron activation analysis using an isotopic neutron source

Autor: D. Trubert, J. Ch. Abbé, J.M. Paulus

Publikováno v: Journal of Radioanalytical and Nuclear Chemistry Articles. 134:405-414

This paper describes an experimental set up using an isotopic neutron source with graphite, preferably to a hydrogen-rich compound, as moderator. This low thermal flux source has been employed in PGNAA experiments. Only those elements having a high c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3cbbda204d2e4be4b5a47d8a2e57e444
https://doi.org/10.1007/bf02278277