ENERGETIC HEAVY FRAGMENTS EMITTED FROM NUCLEAR STARS

Journal Article · Mon Sep 01 04:00:00 EDT 1958 · Nuovo cimento (10)

DOI:https://doi.org/10.1007/BF02903120· OSTI ID:4297510

Nakagawa, S; Tamai, E; Nomoto, S

The authors have investigated the heavy nuclear fragments (Z 3) emitted in the cosmic-ray stars of heavy nuclei (Ag, Br) in emulsions by the method of charge determination which was carried out by measuring their track width. It was found that a majority of the fragments were ejected by the nuclear evaporation process, but that also there was a small number of the enengetic fragments (Z 3) not explained by this process. These energetic ones emitted in the stars (due to Ag or Br nuclei) induced by 6.2 Bev protons from the Bevatron are described. The charge distribution. angular distribution, and energy spectra of those particles were determined. The angular distribution shows strong collimations in the direction of the primary, and significantgny differs from that of the evaporated (slow) fragments. The charge distribution gives an exponential decrease with increase in the charge and is similar in form to that of 1he evaporation process. It seems that the energetic fragments may not be produced by the evaporation process nor by the direct knock-on processes by the primary. It is probable that they may be ejected as the result of intense local heating near the surface of the nucleus during the process of nuclear cascade. (auth)

• Research Organization: Rikkyo (St. Paul's) Univ., Ikebukuro, Tokyo
• Sponsoring Organization: USDOE
• NSA Number: NSA-13-000315
• OSTI ID: 4297510
• Journal Information: Nuovo cimento (10), Journal Name: Nuovo cimento (10) Vol. Vol: 9
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
BETATRONS
BROMINE
COSMIC RADIATION
DISTRIBUTION
ELECTRIC CHARGES
FISSION PRODUCTS
NUCLEAR EMULSIONS
NUCLEAR REACTIONS
NUCLEAR THEORY
PARTICLE TRACKS
PHYSICS AND MATHEMATICS
PROTONS
QUANTITATIVE ANALYSIS
SILVER
SPECTRA