Progress in the study of nuclear clustering in the relativistic 10B and 11C nuclei dissociation in nuclear track emulsion is presented. The contribution of the unbound 8Be and 9B nuclei to their ...structure is determined on the basis of measurements of the emission angles of relativistic He and H fragments.
The structural features of {sup 10}B are studied by analyzing the dissociation of nuclei of this isotope at an energy of 1 A GeV in nuclear track emulsion. The fraction of the {sup 10}B → 2He + H ...channel in the charge state distribution of fragments is 78%. It was determined based on the measurements of fragment emission angles that unstable {sup 8}Be{sub g.s.} nuclei appear with a probability of (26 ± 4)%, and (14 ± 3)% of them are produced in decays of an unstable {sup 9}B{sub g.s.} nucleus. The Be + H channel was suppressed to approximately 1%.
The structural features of
10
B are studied by analyzing the dissociation of nuclei of this isotope at an energy of 1 A GeV in nuclear track emulsion. The fraction of the
10
B → 2He + H channel in ...the charge state distribution of fragments is 78%. It was determined based on the measurements of fragment emission angles that unstable
8
Be
g.s.
nuclei appear with a probability of (26 ± 4)%, and (14 ± 3)% of them are produced in decays of an unstable
9
B
g.s.
nucleus. The Be + H channel was suppressed to approximately 1%.
Source velocity at relativistic beams of 4He Avdeyev, S. P.; Karnaukhov, V. A.; Karcz, W. ...
Bulletin of the Russian Academy of Sciences. Physics,
3/2016, Letnik:
80, Številka:
3
Journal Article
Recenzirano
The source velocities (β = ν/
c
) extracted from rapidity plots of the fragment invariant probability distribution in terms of the longitudinal versus transversal velocity components has been studied ...for
4
He + Au collisions at 4 and 14.6 GeV. It was found transition from broad range source velocities distribution in case of
4
He(4 GeV) + Au to fixed source velocity in case of
4
He(14.6 GeV) + Au.
The source velocities (beta = ν/c) extracted from rapidity plots of the fragment invariant probability distribution in terms of the longitudinal versus transversal velocity components has been ...studied for 4He + Au collisions at 4 and 14.6 GeV. It was found transition from broad range source velocities distribution in case of 4He(4 GeV) + Au to fixed source velocity in case of 4He(14.6 GeV) + Au.
The charge topology of coherent-dissociation events is presented for
11
С and
12
N nuclei of energy 1.2 GeV per nucleon bombarding nuclear track emulsions. This topology is compared with respective ...data for
7
Be,
8,10
B,
9,10
C, and
14
N nuclei.
The tensor analyzing power
T
20 of the reaction
d+A→π
−(0°)+X
has been measured in the fragmentation of 9 GeV tensor polarized deuterons into pions with momenta from 3.5 to 5.3 GeV/c on hydrogen, ...beryllium and carbon targets. This kinematic range corresponds to the region of cumulative hadron production with the cumulative variable
x
c
from 1.08 to 1.76. The values of
T
20 have been found to be small and consistent with positive values. This contradicts the predictions based on a direct mechanism assuming
NN collision between a high momentum nucleon in the deuteron and a target nucleon (
NN→
NNπ).
The charge topology in the fragmentation of sup.10C nuclei in a track nuclear emulsion at an energy of 1.2 GeV per nucleon is studied. In the coherent dissociation of sup.10C nuclei, about 82% of ...events are associated with the channel sup.10C → 2α + 2p. The angular distributions and correlations of product fragments are presented for this channel. It is found that among sup.10C → 2α + 2p events, about 30% are associated with the process in which dissociation through the ground state of the unstable sup.9Be.sub.g.s. nucleus is followed by sup.8Be.sub.g.s. + p decays. DOI: 10.1134/S1063778813100141
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