Nuclear Physics and Atomic Energy

ядерна ф≥зика 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, Russian
  Periodicity: 4 times per year

  Open access peer reviewed journal


 Home page   About 
Nucl. Phys. At. Energy 2016, volume 17, issue 3, pages 215-225.
Section: Nuclear Physics.
Received: 03.08.2016; Accepted: 19.10.2016; Published online: 13.12.2016.
PDF Full text (en)
https://doi.org/10.15407/jnpae2016.03.215

Spectroscopy of 232U in the (p, t) reaction: Experimental data

A. I. Levon1,*, G. Graw2, R. Hertenberger2, A. A. Shevchuk1, P. G. Thirolf2, H.-F. Wirth2

1Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
2Fakultat fur Physik, Ludwig-Maximilians-Universitat Munchen, Garching, Germany


*Corresponding author. E-mail address: levon@kinr.kiev.ua

Abstract: The excitation spectra in the deformed nucleus 232U have been studied by means of the (p, t) reaction, using the Q3D spectrograph facility at the Munich Tandem accelerator. The angular distributions of tritons were measured for 162 excitations seen in the triton spectra up to 3.25 MeV. 0+ assignments are made for 13 excited states by comparison of experimental angular distributions with the calculated ones using the CHUCK3 code. Assignments up to spin 6+are made for other states.

Keywords: 0+ states, (p, t) reaction, coupled-channel approximation analysis.

References:

1. A.I. Levon, J. de Boer, G. Graw et al. The Nuclear Structure of 229Pa from the 231Pa(p,t)229Pa and 230Th(p,2nγ)229Pa Reactions. Nucl. Phys. A 576 (1994) 267. https://doi.org/10.1016/0375-9474(94)90260-7

2. H.-F. Wirth, G. Graw, S. Christen et al. 0+ states in deformed actinide nuclei by the (p,t) reaction. Phys. Rev. C 69 (2004) 044310. https://doi.org/10.1103/PhysRevC.69.044310

3. M. Spieker, D. Bucurescu, J. Endres et al. Possible experimental signature of octupole correlations in the 0+2 states of the actinides. Phys. Rev. C 88 (2013) 041303. https://doi.org/10.1103/PhysRevC.88.041303

4. S.R. Lesher, A. Aprahamian, L. Trache et al. New 0+ states in 158Gd. Phys. Rev. C 66 (2002) 051305. https://doi.org/10.1103/PhysRevC.66.051305

5. D.A. Meyer, V. Wood, R.F. Casten et al. Extensive investigation of 0+ states in rare earth region nuclei. Phys. Rev. C 74 (2006) 044309. https://doi.org/10.1103/PhysRevC.74.044309

6. D. Bucurescu, G. Graw, R. Hertenberger et al. High-resolution study of 0+ and 2+ excitations in 168Er with the (p,t) reaction. Phys. Rev. C 73 (2006) 064309. https://doi.org/10.1103/PhysRevC.73.064309

7. L. Bettermann, S. Heinze, J. Jolie et al. High-resolution study of 0+ states in 170Yb. Phys. Rev. C 80 (2009) 044333. https://doi.org/10.1103/PhysRevC.80.044333

8. G. Ilie, R.F. Casten, P. von Brentano et al. Investigation of 0+ states in 192Pt and 194Pt isotopes. Phys. Rev. C 82 (2010) 024303. https://doi.org/10.1103/PhysRevC.82.024303

9. C. Bernards, R.F. Casten, V. Werner et al. Investigation of 0+ states in 198Hg after two-neutron pickup. Phys. Rev. C 87 (2013) 024318. https://doi.org/10.1103/PhysRevC.87.024318

10. A.I. Levon, G. Graw, Y. Eisermann et al. Spectroscopy of 230Th in the (p,t) reaction. Phys. Rev. C 79 (2009) 014318. https://doi.org/10.1103/PhysRevC.79.014318

11. A.I. Levon, G. Graw, R. Hertenberger et al. 0+ states and collective bands in 228Th studied by the (p,t) reaction. Phys. Rev. C 88 (2013) 014310. https://doi.org/10.1103/PhysRevC.88.014310

12. N. Lo Iudice, A.V. Sushkov, N.Yu. Shirikova et al. Microscopic structure of low-lying 0+ states in the deformed 158Gd. Phys. Rev. C 70 (2004) 064316. https://doi.org/10.1103/PhysRevC.70.064316

13. N. Lo Iudice, A.V. Sushkov, N.Yu. Shirikova et al. Microscopic structure of low-lying 0+ states in deformed nuclei. Phys. Rev. C 72 (2005) 034303. https://doi.org/10.1103/PhysRevC.72.034303

14. N.V. Zamfir, Jing-ye Zhang, R.F. Casten et al. Interpreting recent measurements of 0+ states in 158Gd. Phys. Rev. C 66 (2002) 057303. https://doi.org/10.1103/PhysRevC.66.057303

15. Y. Sun, A. Aprahamian, Zhang Jing-ye, Lee Ching-Tsai. Nature of excited 0+ states in 158Gd described by the projected shell model. Phys. Rev. C 68 (2003) 061301. https://doi.org/10.1103/PhysRevC.68.061301

16. R.K. Sheline, P. Alexa. Search for the beginning of chaos in the low-energy Region of well deformed even-even nuclei. Acta Phys. Pol. B 39 (2008) 711. http://www.actaphys.uj.edu.pl/fulltext?series=Reg&vol=39&page=711

17. E. Browne. Nuclear Data Sheets for A = 232. Nucl. Data Sheets 107 (2006) 2579. https://doi.org/10.1016/j.nds.2006.09.001

18. E. Zanotti, M. Bisenberger, R. Hertenberger et al. A long position angle resolving light ion detector for the Munich Q3D magnetic spectrograph. Nucl. Instrum. Methods A 310 (1991) 706. https://doi.org/10.1016/0168-9002(91)91123-D

19. H.-F. Wirth. A new cathode strip detector for the focal plane of the Munich Q3D magnetic spectrograph, Ph.D. thesis (Techn. Univ. Munchen, 2001). http://tumb1.biblio.tu-munchen.de/publ/diss/ph/2001/wirth.html

20. F. Riess. GASPAN at the UNIX computers: Annual Report (Beschleuniger Laboratorium Munchen, 1991) p. 168.

21. F.D. Becchetti, G.W. Greenlees. Nucleon-Nucleus Optical-Model Parameters, A > 40, E < 50 MeV. Phys. Rev. 182 (1969) 1190. https://doi.org/10.1103/PhysRev.182.1190

22. E.R. Flynn, D.D. Armstrong, J.G. Beery, A.G. Blair. Triton Elastic Scattering at 20 MeV. Phys. Rev. 182 (1969) 1113. https://doi.org/10.1103/PhysRev.182.1113

23. F.D. Becchetti, G.W. Greenlees. Nucleon-Nucleus Optical-Model Parameters. Proc. Third Int. Symp. on Polarization Phenomena in Nuclear Reactions (Medison, 1970). Ed. by H.H. Barshall and W. Haeberli (Medison, University of Wisconsin Press, 1971) p. 68.

24. P.D. Kunz. Computer code CHUCK3. University of Colorado, unpublished.

25. G. Ardisson, M. Hussonnois, J.F. LeDu et al. Levels of 232U Fed in 236Pu α Decay. Phys. Rev. C 49 (1994) 2963. https://doi.org/10.1103/PhysRevC.49.2963

26. A.I. Levon, P. Alexa, S. Pascu, P.G. Thirolf. To the nature of 0+ excitations in deformed nuclei of actinides. Nucl. Phys. At. Energy 17(4) (2016) 337. http://jnpae.kinr.kiev.ua/17.4/Articles_PDF/jnpae-2016-17-0337-Levon.pdf