# LXX International conference "NUCLEUS – 2020. Nuclear physics and elementary particle physics. Nuclear physics technologies"

Oct 11 – 17, 2020
Online
Europe/Moscow timezone

## INVESTIGATIONS OF THE EXCITED STATES OF 1P SHELL NUCLEI IN INTERACTION WITH DEUTERONS AT LOW ENERGIES

Oct 13, 2020, 3:05 PM
25m
Online

#### Online

Oral report Section 2. Experimental and theoretical studies of nuclear reactions.

### Speaker

Daniyar Janseitov (Joint Institute for Nuclear Research)

### Description

The differential cross-sections of the elastic and inelastic d + $^{13}$C scattering were measured at E(d)=14.5 and 18 MeV on U150M cyclotron of Institute of Nuclear Physics (Almaty, Kazakhstan).

The first 3.09 MeV $(1/2^{+})$ excited state of $^{13}$C nucleus is of special interest because, it is a state with increased radius, where we can talk about a neutron halo-like structure.

The most probable candidate having the structure of $\alpha$-particle condensate is still considered a known Hoyle state of 7.65 MeV (0$^{+}_{2}$) in the $^{12}$C nucleus. In the context of $\alpha$-particle hypothesis, the level of 7.65 MeV in the $^{12}$C nucleus is the simplest example of $\alpha$-particle condensate state and plays an important role in Astrophysics problem. In the work [1], it is proposed that similar Hoyle state can be detected in some neighboring nuclei, such as excited state 8.86 MeV (1/2$^{-}$) in the $^{13}$C nucleus.

In this paper we show the results of the calculations of the radii of the excited states: 3.09 (1/2$^{+}$) and 8.86 (1/2$^{-}$) which were determined by the Modified diffraction model (MDM)[2] at E(d)=14.5 MeV.

[1] M. Milin and W. von Oertzen, EPJ A V 14 (2002);
[2] A.N. Danilov et.al. Phys.Rev. C 80 (2009);

### Primary authors

Daniyar Janseitov (Joint Institute for Nuclear Research) Prof. Nassurlla Burtebayev (Institute of Nuclear Physics, Almaty, Kazakhstan) Dr Dilshod Alimov (Institute of Nuclear Physics, Almaty, Kazakhstan) Dr Marzhan Nassurlla (Institute of Nuclear Physics, Almaty, Kazakhstan) Prof. T Sadykov (Physics and Technology Institute, Satbayev Unversity, Almaty, Kazakhstan) Mr Azamat Aimaganbetov (L.N.Gumilyov ENU, Nur-Sultan, Kazakhstan) Mrs Jumaziya Burtebayeva (Institute of Nuclear Physics, Almaty, Kazakhstan) Prof. Alla Demyanova (National Research Center «Kurchatov Institute», Moscow, Russia) Dr Andrey Danilov (National Research Center «Kurchatov Institute», Moscow, Russia) Mr Viktar Starastsin (National Research Center «Kurchatov Institute», Moscow, Russia)

### Presentation materials

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