The elastic scattering angular distribution (AD) for the
15
N +
11
B system at
E
lab
(
15
N) = 22.5 MeV has been measured at the DC-60 cyclotron located at INP RK. In addition to our newly measured ...data, we have reanalyzed the previously measured
15
N +
11
B cross sections at
E
lab
= 43 MeV using a range of phenomenological and microscopic potentials. The measured AD at 22.5 MeV did not exhibit a significant increase in differential cross sections (DCs) at backward angles (θ > 90°), similar to the previously measured data at
E
lab
= 18.75 MeV and contrary to the measured data at 43 MeV. The measured DC data at backward angles are fairly described using the distorted wave Born approximation (DWBA) method. The
α
-spectroscopic amplitude (
SA
) for the
15
N →
11
B +
α
configuration was extracted and compared to the available one in the literature.
In our previous work Burtebayev
et al, Int J Mod Phys
E
28
, 1950028 (2019), we presented the angular distribution (AD) for
10
B ions elastically scattered from the
12
C target at
E
lab
(
10
B
)
=
...41.3 MeV. The measured data exhibited a pronounced increase in cross-sections at backward angles. This is mostly attributed to the effect of deuteron transfer between the colliding nuclei. In this work, we present the inelastic ADs for the same system leading to the
J
π
=
2
+
,
E
x
=
4.439 MeV and
J
π
=
3
-
,
E
x
=
9.641 MeV excited states of the
12
C nucleus. The measured inelastic
12
C(
10
B,
10
B)
12
C
∗
ADs, together with the previously measured elastic
12
C(
10
B,
10
B)
12
C ADs at
E
lab
(
10
B
)
=
17.5, 18, 41.3 and 100 MeV, are analysed within the methods of distorted wave Born approximation (DWBA) and coupled reaction channels (CRC) using the new B3Y and the standard M3Y effective interaction potentials. Spectroscopic amplitude (SA) values were determined for the
12
C
→
10
B
+
d
configuration.
The crucial phenomenological and experimental predictions for new physics are outlined, where the number of problems of the Standard Model (neutrino masses and oscillations, dark matter, baryon ...asymmetry of the Universe, strong CP-problem) could find their solutions. The analogies between the cosmological neutrino mass scale from the early universe data and laboratory probes are discussed, as well as the search for new physics and phenomena.
New experimental measurements for
16
O +
12
C elastic scattering angular distribution at
E
lab
= 27 MeV were performed at the cyclotron DC-60 INP RK. The measured data as well as the previous ...measurements for
16
O +
12
C angular distributions in the energy range
E
lab
= 20–140 MeV are subjected to detailed analysis using the double folding optical potential. For this purpose, different models of interaction potentials are used, such as the BDM3Y1-Reid and the CDM3Y1-Paris based on the M3Y interactions. The new B3Y-Fetal potentials are also tested, and the efficiency of the DDB3Y1-Fetal interaction to increase the saturation properties of cold nuclear matter was studied in comparison with the well-known BDM3Y1-Reid and CDM3Y1-Paris interactions.
The angular distributions of
13
C elastically scattered by
9
Be nuclei were measured at
E
Lab
(
13
C) = 16.25 and 19.5 MeV. The measured angular distributions were analyzed via the optical model and ...the DWBA within the coupled reaction channels methods. In addition to this, the previously obtained data were reanalyzed at energies
E
Lab
= 22.75, 28.12, 36.15, 57.77 and 72.88 MeV. The aim of the study was to elucidate the role of the
α
-cluster transfer mechanism in the large-angle scattering. As a result of these calculations, the optimal parameters of the potentials and their energy dependence were obtained for
13
C+
9
Be nuclear system. The data at the backward angles are fairly well reproduced. The spectroscopic amplitudes were extracted for the
13
C
→
9
Be +
α
configuration at various energies. The results are compared with previously reported values.
In the presented work, changes in the surface morphology and crystal structure of the coatings obtained by adding Zr, Si, Nb, ZrSi and ZrNb elements added to the TiCN base matrix after thermal ...annealing at high temperature were studied. The novelty of the current study lies in the comprehensive investigation of the structural and compositional changes of carbonitride coatings, their behavior under thermal conditions, and the implications for their practical applications. The goal of the proposed experiment was to evaluate the influence of composition and structure on the oxygen adsorption tendencies at both high (2000 –1500 K) and low temperatures (0–100 K), through molecular dynamics. The formation mechanism of the gas and oxide phase on the surface of the coatings during the thermal annealing was simulated by the molecular dynamics code. The formation of gas products before the formation of the oxide layer on the surface of the coatings was shown by molecular dynamics simulation. Based on the structural analysis conducted by scattering X-rays from small angles, it was determined that a new phase is formed on the surface of the coatings. Formation of free cubic TiC phase was observed in both TiZrSiCN and TiZrNbCN coatings under the influence of temperature. Degradation of surface morphology and formation of pinholes were found after thermal annealing. The experimental formation of the oxide phase on the surface of the sample up to a temperature of 1270 K expands the application possibilities of the coatings in various industrial fields including catalysis.
The proton and deuteron pickup reactions
and
were studied with the
radioactive beam produced by the new fragment separator ACCULINNA-2 at FLNR, JINR. These measurements were initially motivated as ...the test reactions intended for the elucidation of results obtained in the study of the extremely neutron-rich
H and
H systems created in the
and
reactions with the use of the same setup. In the
reaction the
Li 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
population were extracted at the forward center-of-mass angles (
) and compared with the FRESCO calculations. Spectroscopic factor of
, derived by a model suggesting the
clustering was found in accord with the experimental data. The energy spectrum of
Li populated in the
reaction shows the strong peak which corresponds to the excitation of the second excited state of
Li (2.25 MeV,
). The fact that the ground and the first excited states of
Li were not observed in this reaction is consistent with the shell-model structure of the nuclei involved.
Setup fitting the requirements for the detailed study of the five-body decay of the
7
H nucleus obtained as a result of the proton transfer from the
8
He projectiles to the deuterium target nuclei is ...being built at the radioactive beam line of ACCULINNA-2 separator in the G.N. Flerov Laboratory of Nuclear Reactions. Described here is the assembly of 100 BC-404 plastic scintillators, intended for neutron detection, the annular Si detector telescope for the
3
He recoils, and the detector array providing the Δ
E
–
E
-TOF registration of
3
H nuclei emitted at the
7
H decay. Results obtained by the Monte Carlo simulations made for the energy values and flight passes of all these particles are given together with the luminosity expected for the discussed experiments.
In the recent work Nikolskii et al., Phys. Rev. C 105, 064605 (2022) the 2H(8He,4He)6H reaction was used for the study of the extreme neutron-rich 6H isotope. A broad bump was observed in the ...measured 6H spectrum interpreted as the broad overlapping ground and some low-lying states of this nuclide. There could be certain doubts in the interpretation of this work: in conditions of the limited phase space it is not impossible that the structure in the missing mass spectrum of 6H is actually induced by the resonant states populated by some other channels opened in the 8He+2H interaction. This work provides a body of the evidence for the correct channel identification and for the absence of the 6H resonances at energy ET = 0 − 3.5 MeV above the 3H+3n decay threshold. In addition the first strong experimental evidence is given that the 6H → 5H*+n → 3H+3n sequential decay is the dominating 6H decay channel.
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