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Production of neutron-rich light nuclei in fragmentation of target nuclei

Journal Article · · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
OSTI ID:6439401
; ; ; ;
The method of ..delta..E and E semiconductor detectors has been used to study experimentally the cross sections for production of the neutron-rich isotopes /sup 6,8/He and /sup 7,8,9,11/Li in interaction of 6.7-GeV protons and 3.1-GeV deuterons with the nuclei /sup 12/C, /sup 13/C, /sup 27/Al, /sup 112/Sn, /sup 124/Sn, and /sup 238/U. The ratios sigma(A/sub f/+2)/sigma(A/sub f/) are given for the fragmentation product as a function of the neutron-excess parameter of the target nuclei (N/sub t/-Z/sub t/)/A/sub t/ and of the fragments (N/sub f/-Z/sub f/)/A/sub f/. The data obtained indicate a slowing down in the falloff of the function sigma(A/sub f/+2)/sigma(A/sub f/) with increase of the neutron excess of the fragments. An estimate is made of the cross sections for formation of hypothetical neutron nuclei (polyneutron systems) in the fragmentation process. The experimental situation in the region of the hypothetical isotopes /sup 10/He and /sup 13/Li is analyzed.
Research Organization:
V. G. Khlopin Radium Institute
OSTI ID:
6439401
Journal Information:
Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 32:1; ISSN SJNCA
Country of Publication:
United States
Language:
English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 27 TARGET
BARYON REACTIONS
BARYONS
CARBON 12 TARGET
CARBON 13 TARGET
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DEUTERON REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FRAGMENTATION
GEV RANGE
GEV RANGE 01-10
HADRON REACTIONS
HADRONS
ISOTOPE PRODUCTION
ISOTOPES
NEUTRON-RICH ISOTOPES
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
POLYNEUTRONS
PROTON REACTIONS
RADIOISOTOPES
TARGETS
TIN 112 TARGET
TIN 124 TARGET
URANIUM 238 TARGET