29 research outputs found
Study of Proton and Deuteron Pickup Reactions 2H(10Be,3He)9Li an 2H(10Be,4He)8Li with 44 A MeV 10Be Radioactive Beam at ACCULINNA-2 Fragment Separator
The proton and deuteron pickup reactions 2H(10Be,3He)9Li and\\
2H(10Be,4He)8Li radioactive beam produced by the new fragment separator
ACCULINNA-2 at FLNR, JINR\@. These measurements were initially motivated as
test reactions intended for the elucidation of results obtained in the study of
the extremely neutron-rich 7H and 6H systems created in the 2H(10Be,3He)9Li and
2H(10Be,4He)8Li reactions using the same setup. In the 2H(10Be,3He)9Li reaction
the 9Li ground-state () and its first excited state (2.69~MeV, )
were identified in the low-energy region of its excitation spectrum. The
differential cross sections for the 9Li g.~s.) population were extracted at
forward center-of-mass angles () and compared with the FRESCO
calculations. Spectroscopic factor of , derived by a model for the
10Be9Li(g.s.) clustering was found in accord with the experimental
data. The energy spectrum of 8Li populated in the 2H(10Be,4He)8Li reaction
shows the strong peak which corresponds to excitation of the second excited
state of 8Li (2.25 MeV, ). The fact that the ground and the first excited
states of 8Li were not observed is fully consistent with Shell-Model
calculations carried out for the 10Be g.\,s. and 8Li level structure applying
momentum selection rules
OPTIMIZATION OF PRESENTATION AND CONSUMER CONTAINER OF ANTI-RABIES IMMUNOGLOBULIN OBTAINED FROM HORSE SERUM
We presented the data concerning optimization of presentation and consumer container of anti-rabies immunoglobulin obtained, from horse serum.. During the experiments, ampoules and. flasks were used for primary packaging. They were filled within 5 ml of the preparation of freeze-drying. Comparative analysis of physical, chemical and. biological properties and. molecular parameters of freeze-dried and initial forms of the immunoglobulin. was carried out. Freeze-drying was demonstrated to promote stabilization of its properties and. prevent emergence of fragments and. aggregates during anti-rabies immunoglobulin storage
The H states studied in the reaction and evidence of extremely correlated character of the H ground state
The extremely neutron-rich system H was studied in the direct
H transfer reaction with a 26
MeV secondary He beam. The measured missing mass spectrum shows a
resonant state in H at MeV relative to the H+ threshold.
The population cross section of the presumably -wave states in the energy
range from 4 to 8 MeV is
b/sr in the angular range . The
obtained missing mass spectrum is free of the H events below 3.5 MeV
( b/sr in the same angular
range). The steep rise of the H missing mass spectrum at 3 MeV allows to
show that MeV is the lower limit for the possible resonant state
energy in H tolerated by our data. According to paring energy estimates,
such a MeV resonance is a realistic candidate for the H ground
state (g.s.). The obtained results confirm that the decay mechanism of the
H g.s.\ (located at 2.2 MeV above the H+ threshold) is the
``true'' (or simultaneous) emission. The resonance energy profiles and the
momentum distributions of the sequential H \,\rightarrow \,
^5H(g.s.)+n\, \rightarrow \, ^3H+ decay fragments were analyzed by the
theoretically-updated direct four-body-decay and sequential-emission
mechanisms. The measured momentum distributions of the H fragments in the
H rest frame indicate very strong ``dineutron-type'' correlations in the
H ground state decay.Comment: 9 pages, 11 figure
Storage, Accumulation and Deceleration of Secondary Beams for Nuclear Astrophysics
Low-energy investigations on rare ion beams are often limited by the
available intensity and purity of the ion species in focus. Here, we present
the first application of a technique that combines in-flight production at
relativistic energies with subsequent secondary beam storage, accumulation and
finally deceleration to the energy of interest. Using the FRS and ESR
facilities at GSI, this scheme was pioneered to provide a secondary beam of
Te for the measurement of nuclear proton-capture at energies of
6 and 7 MeV/u. The technique provided stored beam intensities of about
ions at high purity and brilliance, representing a major step towards
low-energy nuclear physics studies using rare ion beams