Recent measurements with a balloon-borne Ge(Li) spectrometer in gamma-ray astronomy

Details Recent measurements with a balloon-borne Ge(Li) spectrometer in gamma-ray astronomy Recent measurements with a balloon-borne Ge(Li) spectrometer in gamma-ray astronomy

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977esasp.124..293b&link_type=abstract

In ESA Recent Advan. in Gamma-Ray Astronomy p 293-299 (SEE N78-11899 02-88)

Astronomy and Astrophysics

Astronomy

Astronomy, Balloon-Borne Instruments, Gamma Rays, Radiation Counters, Galactic Radiation, Germanium, Gondolas, Liquid Nitrogen, Point Sources, Spectrometers

Scientific paper

A new high resolution gamma-ray spectrometer, aimed at stellar measurements, was jointly developed at Saclay and Toulouse. The instrument consists of a large Ge (Li) crystal (140 cu cm) cooled at liquid nitrogen temperature and actively shielded by a sodium iodide crystal. Spectral resolution and effective area are, respectively, 3.0 KeV(FWHM) and 2.7 sq cm at 1 MeV. Three flights were carried out in Brazil (Dec. 76, Feb. 77) onboard a stabilized gondola. The background total counting rate was about 10 counts/s in the 0.1 to 8 MeV energy range at floating altitude. Preliminary results and future developments are described.

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