Gamma-ray lines observed in balloon flights at high rigidity

Technical Report · Sun Oct 01 04:00:00 EDT 1978

OSTI ID:6354155

Buivan, N A; Rao, K R; Martin, I M

Gamma ray lines at 0.511 MeV and 1.632 MeV were observed at high rigidity (12.5 GV) during stratospheric balloon flights carried out, up to 4 g/sq cm, from Sao Jose dos Campos, Brazil. The fluxes of these lines are compared with the results obtained at other rigidity regions. The intensity variation of the most prominent of these lines, the annihilation line at 0.511 MeV, is found to be compatible, at various atmospheric depths, with theoretical predictions. The study leads to the estimation of an upper limit for the flux of the extraterrestrial 0.511 MeV gamma ray line.

• Research Organization: Instituto de Pesquisas Espaciais, Sao Jose dos Campos (Brazil)
• OSTI ID: 6354155
• Report Number(s): N-79-10631
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics & Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BALLOONS
BASIC INTERACTIONS
COSMIC PHOTONS
COSMIC RADIATION
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GAMMA RADIATION
GAMMA SPECTRA
INTERACTIONS
IONIZING RADIATIONS
KEV RANGE
KEV RANGE 100-1000
LEPTONS
LIMITING VALUES
MASSLESS PARTICLES
MEV RANGE
MEV RANGE 01-10
PHOTONS
POSITRONS
RADIATION FLUX
RADIATIONS
SPECTRA