TGRS measurements of the positron annihilation spectrum from the galactic center

Details TGRS measurements of the positron annihilation spectrum from the galactic center TGRS measurements of the positron annihilation spectrum from the galactic center

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..510...31h&link_type=abstract

THE FIFTH COMPTON SYMPOSIUM. AIP Conference Proceedings, Volume 510, pp. 31-34 (2000).

Computer Science

Performance

4

Galactic Center, Bar, Circumnuclear Matter, And Bulge, X- And Gamma-Ray Telescopes And Instrumentation, Gamma-Ray

Scientific paper

The TGRS experiment on board the Wind spacecraft includes a Ge detector with very high resolution (3-4 keV FWHM) at energies around 511 keV. To take advantage of WIND's fixed pointing at the south ecliptic pole and its 3 s rotation, TGRS also includes a Pb occulter fixed on the spacecraft body subtending an arc of 90° along the ecliptic plane. Spectra of the Galactic center region, identified by this occultation method, have been accumulated since 1994 November. In this paper we present updated results for the Galactic center positron annihilation line from these occulted spectra. From the results prior to fall 1997 we obtained the intensity, width, energy and variability of the line, the positronium (Ps) fraction, and limited information about the spatial distribution of the line, all of which have been published. Since the fall of 1997, degradation of the instrument performance has limited us to improving our results for the spatial distribution. These updated results are in marginal disagreement (~2.5σ) with a model based on earlier OSSE measurements. .

Affiliated with

Also associated with

No associations

Rating

TGRS measurements of the positron annihilation spectrum from the galactic center does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with TGRS measurements of the positron annihilation spectrum from the galactic center, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and TGRS measurements of the positron annihilation spectrum from the galactic center will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-748447