The interaction of deuteron and proton beams with light nuclei is characterized by a wide variety of reactions of interest for both technical and fundamental applications.
The reaction $^7Li(d,n)α$ is characterized by a high neutron yield and high neutron energy (13.125 MeV), which is relevant for conducting radiation tests of modern materials and equipment.
For the reaction $^{11}B(p, α)αα$,...
New experimental results were obtained for the fragmentation of 230 MeV/nucleon 56Fe on 9Be, 27Al, 64Cu targets. The experiment was carried out on the FRAGM setup at TWA heavy ion facility. The detector FRAGM allows to measure the fragment momentum with high accuracy at an angle of 3.5 degrees [1,2]. It was found that the momentum distribution of light fragments in the rest frame of the...
The formation of the multi-neutron systems 2n and 3n was studied in the reactions of stopped pion absorption by 9Be nuclei. Measurements were carried out at low energy pion channel of LANL using two-arm multilayer semiconductor spectrometer. The bound states of 2n and 3n have not been found. In the missing mass spectrum of the reaction 9Be(pi-, t4He), a peak was observed near the threshold,...
In our previous publications [1–3], a very specific effect, unknown in the past, was discussed, namely a break-up of the fission fragment while it passes through a solid-state foil. The fraction of the fragments which undergo the break-up is supposed to be born in the shape isomer states. The bulk of the results were obtained in the frame of the so-called missing mass experimental method when...
6He is one of the simplest nuclei with a halo in the ground state 0+; its study has received significant theoretical attention [1]. In [2], an assumption was made about a halo-like structure in the isobar-analog state of the 3.563-MeV, 0+ 6Li state. This structure is a spatially extended halo-like structure with an alpha particle core and a proton and neutron surrounding it. One of the last...
In the A=8 multiplet, a halo was first discovered in $^8$B in [1] based on the increased quadrupole moment. It was shown that the halo structure is core $^7$Be and has a valence proton. It should be noted that the halo was discovered despite the presence of both the Coulomb and centrifugal barriers. In [2], using total cross sections, the presence of a proton halo in $^8$B was confirmed, and...
I.N. Borzov, 1, 2
1) National Research Centre”Kurchatov Institute”, Moscow, Russia
2) Bogolubov Laboratory of Theoretical Physics, JINR, Dubna, Russia
The charge radii, beta decay half-lives (T1/2) and delayed neutron emission probabilities (Pn) are calculated in the chains of heavy Hg and Pt isotopes. The self-consistent Finite Fermi Systems theory (TFFS) with the Fayans energy-density...
The creation of heavy isotopes under extremal pulsed neutron fluences (of $10^{24}$ n/cm$^2$ units) of artificial nucleosynthesis is investigated by means of the dynamical model taking into account the temperature decrease at the matter expansion. The first time the creation of isotopes with neutron excess up to mass A = 255 was obtained and discovered in the Mike experiment [1]. An intensive...
At present, a lot of experimental information has been accumulated on the structure of low-lying excited states in Ge isotopes. Interest in these nuclei is due to the fact that with an increase in the number of neutrons there is a transition between spherical and deformed forms of the nucleus that determine their structure. On the other hand, microscopic calculations show that Ge isotopes are...
Fission of heavy nuclei by neutrons at low and intermediate energies (up to 100 MeV) occurs at relatively low angular momenta, which has little effect on the dynamics of nuclear deformation. Due to this, the anisotropy of the angular distribution of fission fragments relative to the direction of motion of incident neutrons is determined by the distribution over the projection K of the spin of...
We propose a quark model of nuclear structure where quark correlations lead to nucleon-nucleon correlations and arrangement of them into lattice--like structure. The model is based on the quark model of nucleon structure in which valence quarks are strongly correlated within a nucleon (SCQM) [1]. Nuclei are built by junctions of SU(3) color fields of two quarks of neighboring nucleons....
Muonic molecular ions He-p-µ and Li-p-µ are studied numerically in the variational approach. Using the complex coordinate rotation method we calculate energies of resonant states. These molecular systems may be of interest for studying low-energy fusion reactions.
The structure of exotic neutron-rich nuclei is one of the main science drivers in contemporary nuclear physics research [1]. The new measurements of pygmy dipole (PDR) and giant dipole (GDR) resonances in neutron-rich nuclei have sparked advancements in nuclear models. The quasiparticle random phase approximation, utilizing the self-consistent mean-field derived from Skyrme effective...
