Methods for Detecting High Energy Photons in Primary Cosmic Rays
Journal Article
·
· Progress of Theoretical Physics (Kyoto)
Detection of the high energy photons in primary cosmic rays provides useful data for the study of the origin of cosmic rays, because they move in straight lines and bring information on the directions of their sources. Two methods are described to detect such photons through the secondary particles produced by them in air. A part of photons can produce inesons capable of reaching sea level through photonuclear interactions with air nuclei, although the majority are absorbed in the atmosphere by producing electron pairs 1010 to 1011ev. These mesons do not suffer considerable scattering from the original direction of - photons, and higher intensities of mesons in a small solid angle containing the direction of the source can be detected in comparison with the average intensity. The lower limit of the photon flux detectable by this metbod is about 4.10-6 cm- sec-i for photons of 200 Bev. For photons near 1012 ev, it is possible to detect cascade showers initiated when observations are made at mountain altitude. Discussions are given on the detection efficiency of these showers by the special arrangement of shower detectors. The minimum detectable flux of photons of 1012 ev by this arrangement is about 2.10-7 cm- sec .
- Research Organization:
- Nagoya Univ., Japan
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-008091
- OSTI ID:
- 4818786
- Journal Information:
- Progress of Theoretical Physics (Kyoto), Journal Name: Progress of Theoretical Physics (Kyoto) Journal Issue: 4 Vol. 26; ISSN 0033-068X
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
Search for. gamma. rays above 10 sup 14 eV from Cygnus X-3 during the June and July 1989 radio outbursts
THE PRIMARY COSMIC RADIATION
A search for point sources of EeV photons
Journal Article
·
Sun Nov 19 23:00:00 EST 1989
· Physical Review Letters; (USA)
·
OSTI ID:5022334
THE PRIMARY COSMIC RADIATION
Technical Report
·
Fri Nov 30 23:00:00 EST 1962
·
OSTI ID:4696872
A search for point sources of EeV photons
Journal Article
·
Thu Jul 10 00:00:00 EDT 2014
· Astrophysical Journal
·
OSTI ID:22365649
Related Subjects
79 ASTRONOMY AND ASTROPHYSICS
ABSORPTION
AIR
ATMOSPHERE
COINCIDENCE METHODS
COSMIC RADIATION
DETECTION
DISTRIBUTION
EFFICIENCY
ELECTRONS
ENERGY LEVELS
ENERGY RANGE
EXCITATION
GAMMA DETECTION
GAMMA RADIATION
INELASTIC SCATTERING
INTERACTIONS
LEVELS
MAGNESIUM 24
MAGNESIUM 26
MEASURED VALUES
NEON 20
PAIR PRODUCTION
PHOTONS
PHOTOPRODUCTION
PIONS
PRODUCTION
PROTON BEAMS
PROTONS
SCATTERING
SILICON 28
SILICON 30
SPIN
SULFUR 32
TARGETS
TRANSIENTS
VAN DE GRAAFF ACCELERATORS
ABSORPTION
AIR
ATMOSPHERE
COINCIDENCE METHODS
COSMIC RADIATION
DETECTION
DISTRIBUTION
EFFICIENCY
ELECTRONS
ENERGY LEVELS
ENERGY RANGE
EXCITATION
GAMMA DETECTION
GAMMA RADIATION
INELASTIC SCATTERING
INTERACTIONS
LEVELS
MAGNESIUM 24
MAGNESIUM 26
MEASURED VALUES
NEON 20
PAIR PRODUCTION
PHOTONS
PHOTOPRODUCTION
PIONS
PRODUCTION
PROTON BEAMS
PROTONS
SCATTERING
SILICON 28
SILICON 30
SPIN
SULFUR 32
TARGETS
TRANSIENTS
VAN DE GRAAFF ACCELERATORS