Positron Annihilation on Polycyclic Aromatic Hydrocarbon molecules in the Interstellar Medium (2009)
Guessoum, N., Jean, P., Gillard, W.
We examine the annihilation of positrons on polycyclic aromatic hydrocarbon (PAH) molecules in interstellar medium conditions. We estimate the annihilation rates of positrons on PAHs by a...
The all-sky distribution of 511 keV electron-positron annihilation emission (2007)
Knödlseder, J., Jean, P., Lonjou, V., Weidenspointner, G., Guessoum, N., Gillard, W., ...
We present a map of 511 keV electron-positron annihilation emission, based on data accumulated with the SPI spectrometer aboard ESA's INTEGRAL gamma-ray observatory, that covers approximately 95% of...
Microquasars as sources of positron annihilation radiation (2006)
Guessoum, N., Jean, P., Prantzos, N.
We consider the production of positrons in microquasars, i.e. X-ray binary systems that exhibit jets frequently, but not continuously. We estimate the production rate of positrons in microquasars,...
Weidenspointner, G., Shrader, C. R., Knoedlseder, J., Jean, P., Lonjou, V., Guessoum, N., ...
We present a measurement of the sky distribution of positronium (Ps) annihilation continuum emission obtained with the SPI spectrometer on board ESA's INTEGRAL observatory. The only sky region from...
Spectral analysis of the Galactic e+e- annihilation emission (2005)
Jean, P., Knodlseder, J., Gillard, W., Guessoum, N., Ferriere, K., Marcowith, A., ...
We present a spectral analysis of the e+e- annihilation emission from the Galactic Centre region based on the first year of measurements made with the spectrometer SPI of the INTEGRAL mission. We...
The all-sky distribution of 511 keV electron-positron annihilation emission (2005)
Knödlseder, J., Jean, P., Lonjou, V., Weidenspointner, G., Guessoum, N., Gillard, W., ...
We present a map of 511 keV electron-positron annihilation emission, based on data accumulated with the SPI spectrometer aboard ESA's INTEGRAL gamma-ray observatory, that covers approximately 95% of...
The lives and deaths of positrons in the interstellar medium (2005)
Guessoum, N., Jean, P., Gillard, W.
We reexamine in detail the various processes undergone by positrons in the ISM from their birth to their annihilation using the most recent results of positron interaction cross sections with H, H2...
The all-sky distribution of 511 keV electron-positron annihilation emission (2005)
Knödlseder, J., Jean, P., Lonjou, V., Weidenspointner, G., Guessoum, N., Gillard, W., ...
A mystery of the galactic bulge: SPI observations of positron annihilation (2005)
Weidenspointner, G., Knödlseder, J., Jean, P., Lonjou, V., Von Ballmoos, P., Harris, M., ...
Lonjou, V., Weidenspointner, G., Knodlseder, J., Jean, P., Allain, M., Von Ballmoos, P., ...
The status of the analysis of the electron/positron annihilation radiation performed by INTEGRAL/SPI in the 4th GALACTIC QUADRANT is reported. We use data from the first two Galactic Center Deep...
Weidenspointner, G., Lonjou, V., Knoedlseder, J., Jean, P., Allain, M., Von Ballmoos, P., ...
During its first year in orbit the INTEGRAL observatory performed deep exposures of the Galactic Center region and scanning observations of the Galactic plane. We report on the status of our analysis...
Status of the 511 keV line from the Galactic Centre region (2004)
Jean, P., Ballmoos, P. Von, Knödlseder, J., Lonjou, V., Weidenspointner, G., Skinner, G. K., ...
The first year of INTEGRAL/SPI : Status of 511 KEV positron annihilation line observations (2004)
Weidenspointner, G., Lonjou, V., Knödlseder, J., Jean, P., Allain, M., Von Ballmoos, P., ...
Neutron capture and 2.2 MeV emission in the atmosphere of the secondary of an X-ray binary (2001)
We consider the production of 2.22 MeV radiation resulting from the capture of neutrons in the atmosphere of the secondary in an X-ray binary system, where the neutrons are produced in the accretion...