Some special features of the fragmentation of a relativistic nucleus {sup 11}B in photoemulsion
- Russian Academy of Sciences, Petersburg Nuclear Physics Institute (Russian Federation)
Events where two doubly charged fragments are directly formed from a fragmenting nucleus {sup 11}B of momentum 2.75 GeV/c per nucleon are separated, the cascade production of such fragments via the fragmentation channel {sup 8}Be {sup {yields}} 2{alpha} being avoided. Where possible, the mass numbers of these doubly charged fragments are determined by using a signal from Coulomb scattering in photoemulsion. It is found that the measured fraction of the isotope {sup 6}He is (9.6 {+-} 1.5)%, while its calculated probability is about 12%. The transverse-momentum distributions obtained experimentally for the isotopes {sup 3}He and {sup 4}He are compatible with a Rayleigh distribution characterized by constant values of 110.4 {+-} 6.0 and 127.5 {+-} 6.0 MeV/c, respectively. These features of the distributions agree with a purely statistical mechanism of the fragmentation of {sup 11}B nuclei.
- OSTI ID:
- 21075858
- Journal Information:
- Physics of Atomic Nuclei, Vol. 70, Issue 6; Other Information: DOI: 10.1134/S1063778807060099; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Ltd; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
- Country of Publication:
- United States
- Language:
- English
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