عنوان

Gamma ray astronomy in the low energy range

Number

TLets448588

Title Proper

Gamma ray astronomy in the low energy range

General Material Designation

[Thesis]

First Statement of Responsibility

Bailey, E. P. A.

Name of Publisher, Distributor, etc.

University of Southampton

Date of Publication, Distribution, etc.

1979

Dissertation or thesis details and type of degree

Thesis (Ph.D.)

Text preceding or following the note

1979

Text of Note

A low energy gamma ray telescope, and the results of its observations are described. The telescope consisted of four sodium iodide crystals, each of 120 cm(2) area, occulted by lead discs. Charged particles are rejected using scintillation, anti-coincidence shields. The telescope was flown from Palestine, Texas in 1974. Gamma rays were observed from the Grab Nebula, the pulsar NP0 532, and the atmospheric background. No evidence for a gamma ray burst was found, giving an upper limit of less than 5.8 x 10(3) bursts per year of intensity greater than 1.6 x 10(-6) ergs cm(-2) Various types of existing, and planned, gamma ray detectors, and successful gamma ray observations are reviewed. Detailed calculations of the detection efficiency of a Double Compton telescope are presented and these results led to the development of the MISO low energy gamma ray telescope. Preliminary calculations of the detection efficiency of an Anticollimated Double Compton telescope are presented, which suggest that further, more detailed investigation of this type of detector would prove fruitful.

QB Astronomy ; QC Physics

Bailey, E. P. A.

University of Southampton

Electronic name

p

[Thesis]

276903

a

Y