Abstract
In searches along a track in the chamber irradiated at the Laboratory of High Energies at the Joint Institute for Nuclear Research (JINR, Dubna) with oxygen ions accelerated to a momentum of 4.5 GeV/c per nucleon, 215 events containing two or more doubly charged fragments of the primary nucleus were found. Emission angles in the track-emulsion plane were measured in these events. Their distribution is consistent with that which alpha particles are expected to have in an oxygen nucleus prior to its interaction with a track-emulsion nucleus. Events of the 16O → 28Be → 4α type were discovered for the first time. They are treated as events of the coherent electromagnetic dissociation of an oxygen nucleus. Among all events, about 14% of the 8Be → 2α decays proceed through the ground state of spin-parity 0+; an approximately the same fraction of such decays proceed through the first excited state of spin-parity 2+.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
H. H. Heckman et al., Phys. Rev. C 17, 1735 (1978).
M. Freer et al., Phys. Rev. C 70, 064311 (2004).
E. Kh. Bazarov et al., Phys. At. Nucl. 58, 1896 (1995).
Li Jun-Sheng et al., Chin. Phys. 13, 836 (2004).
J. H. Derrickson et al., Phys. Rev. A 51, 1253 (1995).
M. I. Adamovich et al., Europhys. Lett. 44, 571 (1998).
F. A. Avetyan et al., Phys. At. Nucl. 59, 102 (1996).
E. J. Monitz et al., Phys. Rev. Lett. 26, 445 (1971).
F. G. Lepekhin, Phys. At. Nucl. 70, 1074 (2007).
F. G. Lepekhin, Phys. At. Nucl. 72, 243 (2009).
F. G. Lepekhin, http://hepd.pnpi.spb.ru/ofve/nni/opzar.doc
F. G. Lepekhin, Pis’ma Fiz. Elem. Chastits At. Yadra, No. 3, 25 (2002).
F. G. Lepekhin, http://hepd.pnpi.spb.ru/ofve/nni/gibs.txt
F. G. Lepekhin and B. B. Simonov, Phys. At. Nucl. 68, 2039 (2005).
F. G. Lepekhin and L. N. Tkach, Phys. At. Nucl. 74, 721 (2011).
V. V. Dobyrn, E. A. Kotikov, and F. G. Lepekhin, Preprint PIYad. Fiz.-2797 (Petersburg Nucl. Phys. Inst., Gatchina, 2002).
F. G. Lepekhin, http://hepd.pnpi.spb.ru/ofve/nni/resO16.htm
Statistical Methods in Experimental Physics, Ed. by W. T. Eadie, D. Dryard, F. E. Zames, et al. (North-Holland, Amsterdam, 1982; Atomizdat, Moscow, 1976).
I. Ya. Pomeranchuk and E. L. Feinberg, Dokl. Akad. Nauk SSSR 93, 439 (1953).
N. G. Peresad’ko et al., JETP Lett. 88, 75 (2008).
D. O. Krivenkov et al., Phys. At. Nucl. 73, 2103 (2010).
Author information
Authors and Affiliations
Additional information
Original Russian Text © F.G. Lepekhin, L.N. Tkach, 2012, published in Yadernaya Fizika, 2012, Vol. 75, No. 8, pp. 1045–1049.
Rights and permissions
About this article
Cite this article
Lepekhin, F.G., Tkach, L.N. Role of 8Be → 2 α intermediate nuclei in the fragmentation of 16O relativistic nuclei in nuclear track emulsions. Phys. Atom. Nuclei 75, 984–988 (2012). https://doi.org/10.1134/S1063778812040102
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063778812040102