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Title: Production and Study of Neutron-rich Nuclei Using the LICORNE Directional Neutron Source

Abstract

We have recently successfully demonstrated a new technique for production and study of many of the most exotic neutron-rich nuclei at moderate spins. LICORNE, a newly developed directional inverse-kinematic fast neutron source at the IPN Orsay, was coupled to the MINIBALL high resolution γ-ray spectrometer to study nuclei the furthest from stability using the 238U(n,f)reaction. This reaction and 232Th(n,f)are the most neutron-rich fission production mechanisms achievable and can be used to simultaneously populate hundreds of neutron-rich nuclei up to spins of ≈ 16h. High selectivity in the experiment was achieved via tripleγ-ray coincidences and the use of a 400 ns period pulsed neutron beam,a technique which is unavailable to other population mechanisms such as 235U(nth,f) and 252Cf(SF). The pulsing allows time correlations to be exploited to separate delayedγrays from isomeric states in the hundreds of nuclei produced, which are then used to cleanly select a particular nucleus and its exotic binary partners. In the recent experiment, several physics cases are simultaneously addressed such as shape coexistence, the evolution of shell closures far from stability, and the spectroscopy of nuclei in the r-process path near N= 82. Overall, preliminary physics results on anomalies in the 238U(n,f) fission yields and the structuremore » of the 138Te and100Sr nuclei will soon be published. A future project,ν-ball, to couple LICORNE with a hybrid escape-suppressed spectrometer to refine further the technique and achieve a large increase in the observational limit is discussed.« less

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [5];  [5];  [6];  [7];  [2];  [8];  [1];  [8];  [9];  [8];  [10];  [9];  [8];  [8] more »;  [8];  [11];  [12];  [13];  [14];  [1];  [7];  [14];  [15];  [16];  [7];  [5];  [4];  [17];  [10];  [8];  [9];  [9];  [10];  [17];  [10];  [9];  [18];  [9];  [1];  [10];  [9];  [7] « less
+ Show Author Affiliations
  1. Inst. de Physique Nucleaire d'Orsay (France)
  2. European Commission, Karlsruhe (Austria). Joint Research Centre
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Subatech/Ecole des Mines, Nantes (France)
  5. Univ. of Surrey, Guildford (United Kingdom)
  6. Katholieke Univ. Leuven (Belgium)
  7. Univ. Paris-Saclay, Gif-sur-Yvette (France)
  8. Centre National de la Recherche Scientifique (CNRS), Orsay (France). Inst. National de Physique Nucleaire et de Physique des Particules (IN2P3), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM)
  9. Univ. of Oslo (Norway)
  10. Inst. fur Kernphysik, Koln (Germany)
  11. National Physical Lab., Middlesex (United Kingdom)
  12. Centre National de la Recherche Scientifique (CNRS), Orsay (France). Inst. National de Physique Nucleaire et de Physique des Particules (IN2P3), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM); Centre National de la Recherche Scientifique (CNRS), Strasbourg (France). Univ. of Strasbourg, Inst. Pluridisciplinaire Hubert CURIEN (IPHC)
  13. Ludwig Maximilian Univ. of Munich, Munich (Germany)
  14. CENBG Bordeaux, Gradignan (France)
  15. Extreme Light Infrastructure-Nuclear Physics (ELI-NP). Bucharest-Magurele (Romania)
  16. European Commission, Geel (Belgium). Joint Research Centre
  17. Univ. of Surrey, Guildford (United Kingdom); National Physical Lab., Middlesex (United Kingdom)
  18. Univ. of Manchester (United Kingdom)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); German Federal Ministry of Education and Research (BMBF)
OSTI Identifier:
1779594
Report Number(s):
LLNL-JRNL-821902
Journal ID: ISSN 0587-4254; 1031903; TRN: US2209670
Grant/Contract Number:  
AC52-07NA27344; 05P15PKCIA
Resource Type:
Accepted Manuscript
Journal Name:
Acta Physica Polonica. Series B
Additional Journal Information:
Journal Volume: 48; Journal Issue: 3; Journal ID: ISSN 0587-4254
Publisher:
Jagiellonian University
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Wilson, J. N., Lebois, M., Qi, L., Amador-Celdran, P., Bleuel, D., Briz, J. A., Carroll, R., Catford, W., De Witte, H., Doherty, D., Eloirdi, R., Georgiev, G., Gottardo, A., Goasduff, A., Hadynska-Klek, K., Hauschild, K., Hess, M., Ingeberg, V., Konstantinopoulos, T., Ljungvall, J., Lopez-Martens, A., Lorusso, G., Lozeva, R., Lutter, R., Marini, P., Matea, I., Materna, T., Mathieu, L., Oberstedt, A., Oberstedt, S., Panebianco, S., Podolyak, Z., Porta, A., Regan, P. H., Reiter, P., Rezynkina, K., Rose, S. J., Sahin, E., Seidlitz, M., Shearman, R., Siebeck, B., Siem, S., Smith, A. G., Tveten, G. M., Verney, D., Warr, N., Zeiser, F., and Zielinska, M. Production and Study of Neutron-rich Nuclei Using the LICORNE Directional Neutron Source. United States: N. p., 2017. Web. doi:10.5506/aphyspolb.48.395.
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Wilson, J. N., Lebois, M., Qi, L., Amador-Celdran, P., Bleuel, D., Briz, J. A., Carroll, R., Catford, W., De Witte, H., Doherty, D., Eloirdi, R., Georgiev, G., Gottardo, A., Goasduff, A., Hadynska-Klek, K., Hauschild, K., Hess, M., Ingeberg, V., Konstantinopoulos, T., Ljungvall, J., Lopez-Martens, A., Lorusso, G., Lozeva, R., Lutter, R., Marini, P., Matea, I., Materna, T., Mathieu, L., Oberstedt, A., Oberstedt, S., Panebianco, S., Podolyak, Z., Porta, A., Regan, P. H., Reiter, P., Rezynkina, K., Rose, S. J., Sahin, E., Seidlitz, M., Shearman, R., Siebeck, B., Siem, S., Smith, A. G., Tveten, G. M., Verney, D., Warr, N., Zeiser, F., & Zielinska, M. Production and Study of Neutron-rich Nuclei Using the LICORNE Directional Neutron Source. United States. https://doi.org/10.5506/aphyspolb.48.395
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Wilson, J. N., Lebois, M., Qi, L., Amador-Celdran, P., Bleuel, D., Briz, J. A., Carroll, R., Catford, W., De Witte, H., Doherty, D., Eloirdi, R., Georgiev, G., Gottardo, A., Goasduff, A., Hadynska-Klek, K., Hauschild, K., Hess, M., Ingeberg, V., Konstantinopoulos, T., Ljungvall, J., Lopez-Martens, A., Lorusso, G., Lozeva, R., Lutter, R., Marini, P., Matea, I., Materna, T., Mathieu, L., Oberstedt, A., Oberstedt, S., Panebianco, S., Podolyak, Z., Porta, A., Regan, P. H., Reiter, P., Rezynkina, K., Rose, S. J., Sahin, E., Seidlitz, M., Shearman, R., Siebeck, B., Siem, S., Smith, A. G., Tveten, G. M., Verney, D., Warr, N., Zeiser, F., and Zielinska, M. Thu . "Production and Study of Neutron-rich Nuclei Using the LICORNE Directional Neutron Source". United States. https://doi.org/10.5506/aphyspolb.48.395. https://www.osti.gov/servlets/purl/1779594.
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@article{osti_1779594,
title = {Production and Study of Neutron-rich Nuclei Using the LICORNE Directional Neutron Source},
author = {Wilson, J. N. and Lebois, M. and Qi, L. and Amador-Celdran, P. and Bleuel, D. and Briz, J. A. and Carroll, R. and Catford, W. and De Witte, H. and Doherty, D. and Eloirdi, R. and Georgiev, G. and Gottardo, A. and Goasduff, A. and Hadynska-Klek, K. and Hauschild, K. and Hess, M. and Ingeberg, V. and Konstantinopoulos, T. and Ljungvall, J. and Lopez-Martens, A. and Lorusso, G. and Lozeva, R. and Lutter, R. and Marini, P. and Matea, I. and Materna, T. and Mathieu, L. and Oberstedt, A. and Oberstedt, S. and Panebianco, S. and Podolyak, Z. and Porta, A. and Regan, P. H. and Reiter, P. and Rezynkina, K. and Rose, S. J. and Sahin, E. and Seidlitz, M. and Shearman, R. and Siebeck, B. and Siem, S. and Smith, A. G. and Tveten, G. M. and Verney, D. and Warr, N. and Zeiser, F. and Zielinska, M.},
abstractNote = {We have recently successfully demonstrated a new technique for production and study of many of the most exotic neutron-rich nuclei at moderate spins. LICORNE, a newly developed directional inverse-kinematic fast neutron source at the IPN Orsay, was coupled to the MINIBALL high resolution γ-ray spectrometer to study nuclei the furthest from stability using the 238U(n,f)reaction. This reaction and 232Th(n,f)are the most neutron-rich fission production mechanisms achievable and can be used to simultaneously populate hundreds of neutron-rich nuclei up to spins of ≈ 16h. High selectivity in the experiment was achieved via tripleγ-ray coincidences and the use of a 400 ns period pulsed neutron beam,a technique which is unavailable to other population mechanisms such as 235U(nth,f) and 252Cf(SF). The pulsing allows time correlations to be exploited to separate delayedγrays from isomeric states in the hundreds of nuclei produced, which are then used to cleanly select a particular nucleus and its exotic binary partners. In the recent experiment, several physics cases are simultaneously addressed such as shape coexistence, the evolution of shell closures far from stability, and the spectroscopy of nuclei in the r-process path near N= 82. Overall, preliminary physics results on anomalies in the 238U(n,f) fission yields and the structure of the 138Te and100Sr nuclei will soon be published. A future project,ν-ball, to couple LICORNE with a hybrid escape-suppressed spectrometer to refine further the technique and achieve a large increase in the observational limit is discussed.},
doi = {10.5506/aphyspolb.48.395},
journal = {Acta Physica Polonica. Series B},
number = 3,
volume = 48,
place = {United States},
year = {Thu Jan 19 00:00:00 EST 2017},
month = {Thu Jan 19 00:00:00 EST 2017}
}
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https://doi.org/10.5506/aphyspolb.48.395
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