This paper presents the results of a study of the structural, optical, and photocatalytic properties of ceramics based on ATiO
3
titanates, A = Ca, Sr, Ba. Using the method of X-ray phase analysis, ...it was found that in the case of ceramics obtained from a mixture of BaCO
3
and TiO
2
after annealing, the structure is a mixture of two phases, rhombohedral BaTiO
3
and impurity orthorhombic BaTi
4
O
9
. In the case of ceramics obtained from a mixture of CaCO
3
and TiO
2
, the structure is a mixture of two phases of the orthorhombic phase and rutile TiO
2
. In the case of ceramics obtained from a mixture of SrCO
3
and TiO
2
, the structure is a mixture of two phases of the SrTiO
3
orthorhombic phase and the Ti
2
O
5
orthorhombic phase. At the same time, all synthesized ceramics have a high crystallinity degree and order of the crystal structure. An analysis of the optical properties showed that the main changes are associated with the difference in the band gap, which is due to the presence of different phases in the structure of ceramics. Based on the results of photocatalytic reactions, the order of photocatalytic activity of the synthesized ceramics was determined: SrTO
3
/T
2
O
5
> CaTO
3
/TO
2
> BaTO
3
.
In this work, the influence of nuclear interaction to the Coulomb breakup of one-neutron halo nuclei on a heavy target has been studied within the non-perturbative time-dependent approach for low ...beam energies (5–30 MeV/nucleon) including the low-lying resonances in different partial and spin states of
Be. Overall, this numerical technique allows an accurate and straightforward modeling of the nuclear interaction between the projectile and the target on a widely range of the beam energies. Our calculations can be potentially useful for exploring the halo structure in breakup reactions with low beam energies.
Elastic-scattering processes in the
Be reaction are studied on the basis of the 2
three-body cluster model of the
Be nucleus. The
Be three-body wave function obtained by the variational method in the ...Gaussian basis is used to derive an analytic representation of nuclear-matter density distribution. The interaction potential calculated for the
Be system by the double-folding method is employed to analyze experimental data on the differential cross section for the elastic-scattering process
Be (
He,
He)
Be at collision energies between 30 and 60 MeV.
Search for Exotic States in 13C Demyanova, A. S.; Danilov, A. N.; Dmitriev, S. V. ...
JETP letters,
2021/9, Letnik:
114, Številka:
6
Journal Article
Recenzirano
New experimental data on the inelastic scattering of α-particles on
13
C at
and 90 MeV with the excitation of the
state are reported. Data are analyzed using the modified diffraction model. The ...determined rms radius of this state coincides within errors with the radius of the
8.86 MeV state in
13
C and the Hoyle state in
12
C. This result is an argument for a similar structure of these states. The unusual result for the compact 3/2
–
9.90 MeV state in
13
C has been tested by considering its isobar-analog 3/2
–
9.48 MeV state in
13
N. It has been found that these states have a normal non-increased radius.
The analysis of the available data on the α + 9Be elastic scattering in range from 18.4 to 104 MeV, including recent measurements at energies of 40 and carried out. The experimental data on elastic ...scattering were analyzed within the of the optical model using Woods-Saxon potential and the double folding one.
Exotic states of 13C nuclei Burtebayev, N; Janseitov, D M; Kerimkulov, Zh ...
Journal of physics. Conference series,
05/2018, Letnik:
1023, Številka:
1
Journal Article
Recenzirano
Odprti dostop
The new study of differential cross sections of 13C( α,α')13C inelastic scattering at Eα=29 MeV with the excitation of the 9.90 MeV state of the initial nucleus has been carried out. Modified ...diffraction model analysis showed that the root-mean-square (RMS) radius of the nucleus at this level might be approximately 20% less than the one of the ground state. We have showed the possibility of the existence of various states in the structure of the 13C nucleus.
Two independent methods: Asymptotic Normalization Coefficients (ANC) and Modified Diffraction Model (MDM) were applied to new and existing experimental data to search for states with enhanced radii ...in isobaric analogue states (IAS) of 12B and 12N. The ANC analysis of the 11B(d,p)12B reaction at Ed = 21.5 MeV has confirmed neutron halo existence for two states of 12B: 2−, 1.67 MeV and 1−, 2.62 MeV 1. Some new results were obtained for higher excited states: halo-like states were observed for 0+, 2.72 MeV and 3−, 3.39 MeV states. It should be mentioned that the last one is unbound state, which is 19 keV above the neutron emission threshold and in both states last neutron has a non-zero orbital momentum (ln=1 and ln=2 correspondingly). We propose to use MDM to study isobaric analogue states of 12B in the mirror 12N nucleus and apply it to analyze the (3He,t) reaction data. The existing in the literature data are not completed enough to make definite conclusion about halo in the 2− and 1− states of 12N. This fact simulated us to carry out a new experiment on the 12C(3He,t)12N reaction at the end of 2018. The measurements were conducted at the University of Jyväskylä (Finland) using the K130 cyclotron to produce a 3He beam at E(3He)=40 MeV. The differential cross sections of the 12C(3He,t)12N reaction were measured in the c.m. angular range 8°-70°. Preliminary results for angular distributions are obtained. MDM analysis of preliminary (3He,t) experimental data is done.
We have measured the angular distributions for the elastic and inelastic scattering of 4He from 11B in the isochronous cyclotron U-150 M INP RK. The extracted α-particles beam has been accelerated to ...energy 29 MeV and then directed to 11B target. The experimental results were analyzed within the framework of both the optical model using different complex potential and the double folding potential obtained with different density-dependent NN interactions which give the corresponding values of the nuclear incompressibility K in the Hartree-Fock calculation of nuclear matter.
The differential cross sections for the
12
C(
3
He,
t
)
12
N reaction leading to formation of the 1
+
(ground state), 2
+
(0.96 MeV), 2
−
(1.19 MeV), and 1
−
(1.80 MeV) states of
12
N are measured at
...E
(
3
He) = 40 MeV. The analysis of the data is carried out within the modified diffraction model and distorted wave Born approximation. Increased rms radii have been obtained for the ground, 2
−
(1.19 MeV), and 1
−
(1.80 MeV) states. We revealed that
12
B,
12
N, and
12
C in the isobaric analogue states with
T
= 1, and spin-parities 2
−
and 1
−
have increased radii and exhibit properties of neutron and proton halo states.
Elastic scattering of 3He on 14N as an example of 1p-shell nuclei at 50 and 60 MeV has been investigated within the framework of Optical Model. In the Optical Model analysis, both microscopic ...double-folding and phenomenological potentials for the real part of the complex nuclear potential have been used. For both microscopic double-folding and phenomenological analyses, the imaginary potential has taken to be WS volume shaped. It is noticed that while a normalization of the strength of the double-folding real potential is needed to explain the structure observed in the experimental data, a good agreement between experimental data is obtained for the phenomenological potential case.
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