Journal ArticleDOI
Study of Alpha Particles Emitted in Fe-Nucleus Interactions at 1.88 GeV/n
TLDR
In this article, the angular distribution of emitted alpha particles has been investigated for several ranges of charge numbers of projectile fragments, and the result of analysis shows that the emission angle distribution of alpha particles at large angles cannot be explained by the single mechanism of the fragmentation from a clean cut spectator.Abstract:
1.88 GeV/n Fe beams of LBL were vertically irradiated to the chambers composed of a pile of plastic track detector (CR-39) and nuclear emulsion plates. The charge number of projectile fragments in Fe interactions was carefully examined by use of CR-39. The angular distributions of emitted alpha particles have been investigated for several ranges of charge numbers of projectile fragments. The result of analysis shows that the emission angle distribution of alpha particles at large angles cannot be explained by the single mechanism of the fragmentation from a clean cut spectator. For events of central collisions with smaller charges of projectile fragments, the effective temperature for the production of alpha particles turns out to be much higher than that of the evaporation theory. The results are applied to the calibration of primary energy estimation by the opening angles of alpha particles.read more
Citations
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Journal ArticleDOI
Fragmentation of56Fe in Al at 1.88A GeV
Debnath Bhattacharyya,Provas Pal,B. Basu,R. Rakshit,S. C. Mukherjee,A. K. Ganguly,B. Chowdhuri,S. Biswas,N. Durgaprasad +8 more
TL;DR: In this article, the production of fragmented nuclei from relativistic56Fe beam available from LBL Bevalac at 1.88A GeV has been studied using CR-39 (DOP) passive detector placed at an angle of 60° with respect to the beam.
Journal ArticleDOI
Estimation of chemical abundance of primary cosmic-ray nuclei over Alice Springs using balloon-borne passive detectors
TL;DR: A stack consisting of CR-39 (HCB 0.5%), nuclear emulsions and X-ray films was exposed to primary cosmic rays by a balloon lauched from Alice Springs in 1983 and was flown for 32 hours at an atmospheric depth 9.8 g cm−2 air as discussed by the authors.
Journal ArticleDOI
Estimation of elemental abundances of heavy cosmic-ray primaries at the top of the atmosphere using plastic emulsion chamber and the derived source spectrum from the steady-state leaky box model
TL;DR: In this article, the authors presented an experiment for the estimation of charge abundances using plastic emulsion chamber consisting of CR-39 (HCB) and Fuji ET-7B nuclear-emulsion sheet, launched from Alice Springs for 32 hours at an atmospheric depth of 9.8 g cm−2.
Journal ArticleDOI
Study of fragmentation in56Fe+27Al interactions at 1.88A GeV using CR-39 (DOP) solid-state nuclear-track detector
D. P. Bhattacharyya,B. Basu,Pratibha Pal,R. Rakshit,Sandipan Chakraborty,Sanjoy Biswas,N. Durgaprasad +6 more
TL;DR: In this article, the minor axes of the elliptic etch pits were measured by a Leitz Ortholux microscope and the measured double-cone charge resolution was found to be 0.20e.
Journal ArticleDOI
Energy Spectrum of Cosmic-Ray Iron Nucleus Observed with Emulsion Chambers
Yoshihiro Sato,Etsuo Shimada,I. Ohta,Shigeki Tasaka,Shin-ichiro Tanaka,H. Sugimoto,K. Taira,N. Tateyama +7 more
TL;DR: In this paper, the energy spectrum of cosmic-ray Fe-nucleus has been measured from 4 GeV/n to beyond 100 GeV /n using emulsion chambers exposed by a balloon launched from Sanriku, Japan.
References
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Journal ArticleDOI
Development of etched nuclear tracks
TL;DR: In this article, a theoretical description of the etch-track evolution in solid state nuclear track detectors is considered for different initial conditions, for the cases of constant and varying track etch rates, isotropic and anisotropic bulk etching as well as for thick and thin detectors.
Journal ArticleDOI
Energy straggling eliminated as a limitation to charge resolution of transmission detectors
G. Tarle,S. P. Ahlen,P. B. Price +2 more
TL;DR: In this paper, it is shown that this limitation can be overcome with a new nuclear track detector, CR-39(DOP), and that the charge resolution of this detector exceeds that of any other, including semiconductor diodes.
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LVI. Mechanism of π-meson disintegrations
TL;DR: In this article, the authors describe observations made on the disintegration stars produced by nuclear capture of slow negative mesons, in nuclear plates exposed to cosmic radiation. But they do not describe the physical properties of the star-producing mesons.
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Evidence for two different reaction mechanisms in relativistic heavy-ion collisions
TL;DR: In this paper, an exclusive-type study of the transverse momentum distribution of alpha particles emerging as relativistic projectile fragments from collisions of a 1.9 GeV/nucleon 56Fe beam in nuclear emulsion was performed.
Journal ArticleDOI
Kinematical analysis of the experimental data on nucleus-nucleus collisions at 800 MeV/nucleon
TL;DR: In this article, a purely empirical kinematical analysis of the existing data on nucleus-nucleus collisions at the beam energy of 800 MeV/nucleon is presented.