Energy Correlations of α-Particles in the 8Be-Nucleus Ground-State Formation Channel of the 12C(γ,3α) and 16O(γ,4α) Reactions
DOI:
https://doi.org/10.15407/ujpe64.9.787Keywords:
photonuclear reactions, ground state of 8Be nucleusAbstract
The method of diffusion chamber in the magnetic field making use of a bremsstrahlung beam with a maximum photon energy of 150 MeV is applied to study the 12C(y,3a) and 16O(y,4a) reactions. A resonance identified as the ground state of 8Be nucleus is found in the distribution of events over the energy of the relative motion of two a-particles. The partial cross-sections of the 8Be nucleus formation channels are measured. It is shown that the mechanism of interaction between a y-quantum and a virtual a-particle pair takes place in this case.
References
A. Tohsaki, H. Horiuchi, P. Schuck, G. Ropke. Condensation in 12C and 16O. Phys. Rev. Lett. 87, 192501 (2008).
A. Coc, C. Angulo, E. Vangioni-Flamk et al. Big Bang nucleosynthesis, microwave anisotropy, and the light element abundances. Nucl. Phys. A 752, 522 (2005). https://doi.org/10.1016/j.nuclphysa.2005.02.057
F.-K. Thielemann, F. Brachwitz, C. Freiburghaus et al. Element synthesis in stars. Prog. Part. Nucl. Phys. 46, 5 (2001). https://doi.org/10.1016/S0146-6410(01)00103-X
R.I. Dzhibuti, R.Ya. Kezerashvili, N.I. Shubitidze. Photodisintegration of a-cluster nuclei into a-particles. Yad. Fiz. 55, 3233 (1992) (in Russian).
M. Gell-Mann, Valentine L. Telegdi. Consequences of charge independence for nuclear reactions involving photons. Phys. Rev. 91, 169 (1953). https://doi.org/10.1103/PhysRev.91.169
O.F. Nemets, V.G. Neudachin, A.T. Rudchik, Yu.F. Smirnov, Yu.M. Chuvilskii. Nucleon Associations in Atomic Nuclei and Nuclear Reactions of Multinucleon Transfers (Naukova Dumka, 1988) (in Russian).
G.I. Chitanava. Research of the dependence of the resonance structure of the excitation functions of 11B, 12C, and 16O nuclei on the type of the input and output channels. Yad. Fiz. 42, 145 (1985) (in Russian).
S.N. Afanasyev, A.F. Khodyachikh. On the formation mechanism of excited states of the 8Be nucleus in the 12C(y,3a) reaction, Yad. Fiz. 71, 1859 (2008) (in Russian). https://doi.org/10.1134/S106377880811001X
S.N. Afanasyev. The mechanism of the 8Be nucleus formation in the 12C(y,3a) and 16O(y,4a) reactions. Nauk. Visn. Uzhgorod. Univ. Ser. Fiz. 30, 148 (2011) (in Russian).
Yu.M. Arkatov, P.I. Vatset, V.I. Voloshchuk et al. Installation for studying photonuclear reactions. Prib. Tekhn.' Eksp. 3, 205 (1969) (in Russian).
Yu.M. Arkatov, P.I. Vatset, V.I. Voloshchuk et al. Method for processing stereo photographs from a diffusion camera. Preprint No. 70-73 (Kharkiv Institute of Physics and Technology, 1970) (in Russian).
O.F. Nemets, Yu.V. Gofman. Handbook of Nuclear Physics (Naukova Dumka, 1975) (in Russian).
A.M. Baldin, V.I. Gol'danskii, V.M. Maksimenko, I.L. Rosenthal. Kinematics of Nuclear Reactions (Atomizdat, 1968) (in Russian).
D.R. Tilley, J.H. Kelley, J.L. Godwin et al. Energy levels of light nuclei A = 8, 9, 10. Nucl. Phys. A 745, 155 (2004). https://doi.org/10.1016/j.nuclphysa.2004.09.059
Downloads
Published
How to Cite
Issue
Section
License
Copyright Agreement
License to Publish the Paper
Kyiv, Ukraine
The corresponding author and the co-authors (hereon referred to as the Author(s)) of the paper being submitted to the Ukrainian Journal of Physics (hereon referred to as the Paper) from one side and the Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, represented by its Director (hereon referred to as the Publisher) from the other side have come to the following Agreement:
1. Subject of the Agreement.
The Author(s) grant(s) the Publisher the free non-exclusive right to use the Paper (of scientific, technical, or any other content) according to the terms and conditions defined by this Agreement.
2. The ways of using the Paper.
2.1. The Author(s) grant(s) the Publisher the right to use the Paper as follows.
2.1.1. To publish the Paper in the Ukrainian Journal of Physics (hereon referred to as the Journal) in original language and translated into English (the copy of the Paper approved by the Author(s) and the Publisher and accepted for publication is a constitutive part of this License Agreement).
2.1.2. To edit, adapt, and correct the Paper by approval of the Author(s).
2.1.3. To translate the Paper in the case when the Paper is written in a language different from that adopted in the Journal.
2.2. If the Author(s) has(ve) an intent to use the Paper in any other way, e.g., to publish the translated version of the Paper (except for the case defined by Section 2.1.3 of this Agreement), to post the full Paper or any its part on the web, to publish the Paper in any other editions, to include the Paper or any its part in other collections, anthologies, encyclopaedias, etc., the Author(s) should get a written permission from the Publisher.
3. License territory.
The Author(s) grant(s) the Publisher the right to use the Paper as regulated by sections 2.1.1–2.1.3 of this Agreement on the territory of Ukraine and to distribute the Paper as indispensable part of the Journal on the territory of Ukraine and other countries by means of subscription, sales, and free transfer to a third party.
4. Duration.
4.1. This Agreement is valid starting from the date of signature and acts for the entire period of the existence of the Journal.
5. Loyalty.
5.1. The Author(s) warrant(s) the Publisher that:
– he/she is the true author (co-author) of the Paper;
– copyright on the Paper was not transferred to any other party;
– the Paper has never been published before and will not be published in any other media before it is published by the Publisher (see also section 2.2);
– the Author(s) do(es) not violate any intellectual property right of other parties. If the Paper includes some materials of other parties, except for citations whose length is regulated by the scientific, informational, or critical character of the Paper, the use of such materials is in compliance with the regulations of the international law and the law of Ukraine.
6. Requisites and signatures of the Parties.
Publisher: Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine.
Address: Ukraine, Kyiv, Metrolohichna Str. 14-b.
Author: Electronic signature on behalf and with endorsement of all co-authors.
.png){kind=small}
