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gamma. -ray. Present status and problems

Journal Article:

Abstract

As ..gamma..-ray advances straightly through space, the study on cosmic ..gamma..-ray will give the information concerning the origin directly. However, the intensity is weak, and the avoidance of background is a serious problem. The wide-spread components were studied by OSO-3. The intensity of the galactic disc component around 100 MeV was reported as (3.4+-1.0)x10/sup -5/ photons (cm/sup 2/, radian, sec)/sup -1/ by OSO-3 and 0.2x10/sup -4/ photons (cm/sup 2/, radian sec)/sup -1/ by SAS-2, and corresponds to the calculated ..gamma.. yield from ..pi../sup 0/. The strong disc component, so-called galactic center region, has been observed, and is due to the mixture of ..gamma..-ray from ..pi../sup 0/ and inverse Compton ..gamma..-ray. A peak at 476+-24 KeV was found as well as the continuous component. Special care must be taken for the observation of isotropic component, since it is hardly distinguished from the background. It is considered that the isotropic component is due to the inverse Compton scattering of 3/sup 0/K radiation in super-galactic space and the contribution from outer galaxy. The nearest point source of ..gamma..-ray is the sun. Among the other point sources, the crab nebula is the most reliable one. The energy flux of pulse component showed the spectrum  More>>
Authors:
Okudaira, K [1] 
  1. Rikkyo Univ., Tokyo (Japan). Faculty of Science
Publication Date:
Jan 01, 1975
Product Type:
Journal Article
Reference Number:
AIX-07-254023; EDB-76-072629
Resource Relation:
Journal Name: Uchusen Kenkyu; (Japan); Journal Volume: 19:2
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COSMIC GAMMA BURSTS; COSMIC RADIATION; COSMIC GAMMA SOURCES; COSMIC RAY FLUX; GALAXIES; GAMMA RADIATION; GAMMA SPECTRA; PHOTONS; SOLAR RADIATION; COSMIC RAY SOURCES; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; IONIZING RADIATIONS; MASSLESS PARTICLES; PRIMARY COSMIC RADIATION; RADIATION FLUX; RADIATIONS; SPECTRA; 640101* - Astrophysics & Cosmology- Cosmic Radiation
OSTI ID:
7181740
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: CODEN: UCKEA
Submitting Site:
INIS
Size:
Pages: 292-300
Announcement Date:

Journal Article:

Citation Formats

Okudaira, K. gamma. -ray. Present status and problems. Japan: N. p., 1975. Web.
Okudaira, K. gamma. -ray. Present status and problems. Japan.
Okudaira, K. 1975. "gamma. -ray. Present status and problems." Japan.
@misc{etde_7181740,
title = {gamma. -ray. Present status and problems}
author = {Okudaira, K}
abstractNote = {As ..gamma..-ray advances straightly through space, the study on cosmic ..gamma..-ray will give the information concerning the origin directly. However, the intensity is weak, and the avoidance of background is a serious problem. The wide-spread components were studied by OSO-3. The intensity of the galactic disc component around 100 MeV was reported as (3.4+-1.0)x10/sup -5/ photons (cm/sup 2/, radian, sec)/sup -1/ by OSO-3 and 0.2x10/sup -4/ photons (cm/sup 2/, radian sec)/sup -1/ by SAS-2, and corresponds to the calculated ..gamma.. yield from ..pi../sup 0/. The strong disc component, so-called galactic center region, has been observed, and is due to the mixture of ..gamma..-ray from ..pi../sup 0/ and inverse Compton ..gamma..-ray. A peak at 476+-24 KeV was found as well as the continuous component. Special care must be taken for the observation of isotropic component, since it is hardly distinguished from the background. It is considered that the isotropic component is due to the inverse Compton scattering of 3/sup 0/K radiation in super-galactic space and the contribution from outer galaxy. The nearest point source of ..gamma..-ray is the sun. Among the other point sources, the crab nebula is the most reliable one. The energy flux of pulse component showed the spectrum of E/sup -1/. ..gamma..-ray bursts were observed by man-made satellites Vela-5 and 6. Theoretical explanation is still incomplete regarding the bursts. (Kato, T.).}
journal = {Uchusen Kenkyu; (Japan)}
volume = {19:2}
journal type = {AC}
place = {Japan}
year = {1975}
month = {Jan}
}