Future Perspectives for Surrogate-Reaction Studies at Storage Rings
215
5 Conclusions
Surrogate reactions are one of the most promising indirect methods to determine
neutron-induced cross sections. These reactions aim to produce the same compound
nucleus as the neutron-induced reaction of interest and study its decay (fission,
particle- or γ-emission) probabilities. The previous fission and γ-emission probability measurements have opened many questions on how the surrogate method can
be used; therefore, systematic studies are required to establish how the method can
be used.
Looking forward to improve the quality of surrogate-reaction data, we aim to
perform future measurements in inverse kinematics at storage rings, simultaneously
measuring all the decay probabilities with good excitation energy resolution. The
future set-up considers using solar cells as heavy-ion detectors. Given their cost and
radiation hardness, these detection systems are not only advantageous for storage
rings but possibly in beam diagnostics. We have studied the response of solar cells to
heavy ions at energies up to 15 MeV/u. These studies show promising preliminary
results regarding energy and time resolution, as well as radiation damage. Other
exposures are foreseen in the near future to further explore the potential of solar
cells as heavy-ion detectors.
Acknowledgements This work has been supported by the French “defi NEEDs”, by the European
Commission within the EURATOM FP7 Framework through CHANDA (project no. 605203) and
in part by the ExtreMe Matter Institute EMMI at the GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt, Germany.
References
1. J.E. Escher et al., Rev. Mod. Phys. 84, 353–397 (2012)
2. J.E. Escher et al., Phys. Rev. Lett. 121, 5 (2018)
3. B. Jurado et al., Eur. Phys. J. Web Conf. 146, 11006 (2017)
4. M. Petit et al., Nucl. Phys. A 735, 345 (2004)
5. G. Kessedjian et al., Phys. Lett. B 692, 297 (2010)
6. G. Boutoux et al., Phys. Lett. B 712, 319 (2012)
7. Q. Ducasse et al., Phys. Rev. 94, 024614 (2016)
8. R.P. Sanchez et al., Nucl. Instrum. Meth. A 933, 63–70 (2018)
9. R. Perez Sanchez, PhD thesis. University of Bordeaux
10. Y.A. Litvinov et al., Nucl. Instrum. Meth. B 317, 537–543 (2013)
11. B. Mei et al., Phys. Rev. 92, 054302 (2015)
12. M. Lestinsky et al., Eur. Phys. J. Special Topics 225, 797 (2016)
13. G. Kessedjian et al., Phys. Rev. 91, 041601 (2015)
14. S. Siegert et al., Nucl. Instr. Meth. A 164, 435 (1979)
15. M. Hsieh et al., IEEE Electron Device Lett. 4, 7 (1981)
16. N.N. Ajitanand et al., Nucl. Instr. Meth. A 300, 354 (1991)
215
5 Conclusions
Surrogate reactions are one of the most promising indirect methods to determine
neutron-induced cross sections. These reactions aim to produce the same compound
nucleus as the neutron-induced reaction of interest and study its decay (fission,
particle- or γ-emission) probabilities. The previous fission and γ-emission probability measurements have opened many questions on how the surrogate method can
be used; therefore, systematic studies are required to establish how the method can
be used.
Looking forward to improve the quality of surrogate-reaction data, we aim to
perform future measurements in inverse kinematics at storage rings, simultaneously
measuring all the decay probabilities with good excitation energy resolution. The
future set-up considers using solar cells as heavy-ion detectors. Given their cost and
radiation hardness, these detection systems are not only advantageous for storage
rings but possibly in beam diagnostics. We have studied the response of solar cells to
heavy ions at energies up to 15 MeV/u. These studies show promising preliminary
results regarding energy and time resolution, as well as radiation damage. Other
exposures are foreseen in the near future to further explore the potential of solar
cells as heavy-ion detectors.
Acknowledgements This work has been supported by the French “defi NEEDs”, by the European
Commission within the EURATOM FP7 Framework through CHANDA (project no. 605203) and
in part by the ExtreMe Matter Institute EMMI at the GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt, Germany.
References
1. J.E. Escher et al., Rev. Mod. Phys. 84, 353–397 (2012)
2. J.E. Escher et al., Phys. Rev. Lett. 121, 5 (2018)
3. B. Jurado et al., Eur. Phys. J. Web Conf. 146, 11006 (2017)
4. M. Petit et al., Nucl. Phys. A 735, 345 (2004)
5. G. Kessedjian et al., Phys. Lett. B 692, 297 (2010)
6. G. Boutoux et al., Phys. Lett. B 712, 319 (2012)
7. Q. Ducasse et al., Phys. Rev. 94, 024614 (2016)
8. R.P. Sanchez et al., Nucl. Instrum. Meth. A 933, 63–70 (2018)
9. R. Perez Sanchez, PhD thesis. University of Bordeaux
10. Y.A. Litvinov et al., Nucl. Instrum. Meth. B 317, 537–543 (2013)
11. B. Mei et al., Phys. Rev. 92, 054302 (2015)
12. M. Lestinsky et al., Eur. Phys. J. Special Topics 225, 797 (2016)
13. G. Kessedjian et al., Phys. Rev. 91, 041601 (2015)
14. S. Siegert et al., Nucl. Instr. Meth. A 164, 435 (1979)
15. M. Hsieh et al., IEEE Electron Device Lett. 4, 7 (1981)
16. N.N. Ajitanand et al., Nucl. Instr. Meth. A 300, 354 (1991)