Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

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V. Ostashko¹, M. Lattuada², M. Milin³, O. Goryunov¹, A. Di Pietro², D. Miljanic³, M. Zadro³, A. Musumara², M.-G. Pellegriti², S. Romano², S. Tudisco², A. Tumino², P. Figuera², H. Bohlen⁴, W. von Oertzen⁴, T. Kokalova⁴, S. Shumerer<sup>4

1</sup>Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
²Istituto Nazionale di Fisica Nucleare, Catania, Italy
³Laboratory of Experimental Nuclear Physics of the Ruđer Bošković Institute, Zagreb, Croatia
⁴The Hahn-Meitner-Institut, Berlin, Germany

Abstract: Many-particle exit channels ⁹Be(¹³C,¹³Cα)⁵He and ⁹Be(¹³C,¹³C⁸Be_g.s.)n from the ⁹Be + ¹³C interaction have been experimentally investigated. Information has been received on ⁸Be_g.s. - n and α - ⁵He configurations associated with ⁹Be excitation states. Comparison of these configurations with calculations based on alpha-cluster conception with a valence neutron is discussed.

1. Kanada-En'yo Y., Horiuchi H. Structure of Light Unstable Nuclei Studied with Antisymmetrized Molecular Dynamics. Progress of Theoretical Physics. Supplement 142 (2001) 205. https://doi.org/10.1143/PTPS.142.205

2. Itagaki N., Okabe S., Ikeda K. Molecular-Orbital Structure in Light Neutron-Rich Nuclei. Progress of Theoretical Physics. Supplement 142 (2001) 297. https://doi.org/10.1143/PTPS.142.297

3. W. von Oertzen, Freer M., Kanada-En’yo Y. Nuclear Clusters and Nuclear Molecules (2006) 52 p. (unpublished).

4. Proc. of the 7th Int. Conf. on Clustering Aspects of Nuclear Structure and Dynamics. Ed. M. Korolija, Z. Basrak, R. Caplar, Rab. Croatia, 14 - 19 June 1999 (Singapore: World Scientific Publishing, 2000) p. 30.

5. Fulton R. R. Nuclear clusters and nuclear molecules. Zeitschrift für Physik A: Hadrons and Nuclei A 349 (1994) 227. https://doi.org/10.1007/BF01288964

6. Betts R. R., Wuosmaa A. H. Nuclear molecules. Reports on Progress in Phys. 60 (1997) 819. https://doi.org/10.1088/0034-4885/60/8/002

7. Horiuchi H., Ikeda K., Suzuki Y. Chapter III. Molecular-Like Structures in Nuclear System. Supplement of the Progress of Theoretical Physics 52 (1972) 89. https://doi.org/10.1143/PTPS.52.89

8. Datar V. M., Suresh Kumar, D. R. Chakrabarty et al. Phys. Rev. Lett. 94 (2005) 122502. https://doi.org/10.1103/PhysRevLett.94.122502

9. Tilley D. R., Kelley J. H., Godwin J. L. et al. Energy levels of light nuclei A = 8, 9, 10. Nucl. Phys. A 745 (2004) 155. https://doi.org/10.1016/j.nuclphysa.2004.09.059

10. Arai K., Descouvemont P., Baye D., Catford W. N. Resonance structure of ⁹Be and ⁹B in a microscopic cluster model. Phys. Rev. C 68 (2003) 014310. https://doi.org/10.1103/PhysRevC.68.014310

11. Forssén C., Navrátil P., Ormand W. E., Caurier E. Large basis ab initio shell model investigation of ⁹Be and ¹¹Be. Phys. Rev. C 71 (2005) 044312. https://doi.org/10.1103/PhysRevC.71.044312

12. W. von Oertzen. Two-center molecular states in ⁹B, ⁹Be, ¹⁰Be, and ¹⁰B. Z. Phys. A 354 (1996) 37. https://doi.org/10.1007/s002180050010

13. Prezado Y., Borge M. J. G., Diget C. Aa. et al. Low-lying resonance states in the ⁹Be continuum. Phys. Lett. B 618 (2005) 43. https://doi.org/10.1016/j.physletb.2005.05.030

14. Dasgupta M., Hinde D. J., Butt R. D. et al. Fusion versus Breakup: Observation of Large Fusion Suppression for ⁹Be + ²⁰⁸Pb. Phys. Rev. Lett. 82 (1999) 1395. https://doi.org/10.1103/PhysRevLett.82.1395

15. Itagaki N., Ikeda K., Okabe S., Otsuka T. Exotic Cluster Shapes in Neutron-Rich Be and C Isotopes. Progress of Theoretical Physics. Supplement 146 (2002) 207. https://doi.org/10.1143/PTPS.146.207

16. Базрак З., Вінчігуера Д., Горюнов О. Ю. та ін. Дослідження високої області збуджень ядра ²⁴Mg в реакції ¹²С(¹⁶О, ¹⁶О, ⁸Ве)α. Scientific Papers of the Institute for Nuclear Research 5 (2004) 7. https://jnpae.kinr.kyiv.ua/05.1/Articles_PDF/jnpae-2004-05-1-007.pdf

17. Ostashko V. V., Tumino A., Romano S. A method to calibrate a Silicon Position Sensitive Detector. Sci. Papers of the Inst. for Nucl. Res. 3 (2003) 155.

18. Tumino A., Lattuada M., Romano S. et al. ¹⁶O - ⁸Be break up states and cluster structure of ²⁴Mg. Eur. Phys. J. A 12 (2001) 327. https://doi.org/10.1007/s100500170010

19. Soić N., Cali D., Cherubini S. et al. Eur. Phys. J. A 3 (1998) 303. https://doi.org/10.1007/s100500050182

20. Soić N., Cali D., Cherubini S. et al. α-⁵He decaying states and ground state rotational band of ⁹Be. arXiv:nucl-ex/9801009 v1 29 Jan 1998.

21. Murphy A. A Search for ¹⁶O+¹⁶O+¹⁶O Breakup of ⁴⁸Cr. Submitted for the degree of Doctor of Philosophy, 1996, University of Birmingham (unpublished).

22. Descouvemont P. Microscopic study of α-clustering in the ^9,10,11Be isotopes. Nucl. Phys. A 699 (2002) 463. https://doi.org/10.1016/S0375-9474(01)01286-6

23. Hernández L. de la Peña et al. α-cluster structure in Be isotopes. J. Phys. G: Nucl. Part. Phys. 27 (2001) 2019. https://doi.org/10.1088/0954-3899/27/10/305

24. Барит И. Я., Зуев С. В., Осташко В. В., Симонов В. А. Изучение области высоких возбуждений изотопов бериллия в реакциях ^6,7Li + α при Е_α = 94 МэВ. Краткие сообщения по физике ФИАН 5-6 (1994) 82.

25. Ohlsen G. G. Kinematic Relations in Reactions of the form A+B → C+D+E. Nucl. Instrum. and Meth. in Physics Research A 37 (1965) 240. https://doi.org/10.1016/0029-554X(65)90368-X

26. Furic M., Forster H. H. Two-particle coincidence measurement of the Four Body Break-Up: Kinematics, phase space, and the detection of possible resonances. Nucl. Instrum. and Meth. in Physics Research A 98 (1972) 301. https://doi.org/10.1016/0029-554X(72)90111-5

27. B. R. Fulton, R. L. Cowin, R. J. Woolliscroft et al. Exclusive breakup measurements for ⁹Be. Physical Review C 70 (2004) 047602. https://doi.org/10.1103/PhysRevC.70.047602

28. Koike Y. ⁹Be: A gateway nucleus into heavier nuclei? arXiv:nucl-th/0201075 v2 5 Mar 2002.