Radiochemical study of the kinematics of multi-nucleon transfer reactions in 48Ca + 248Cm collisions 10% above the Coulomb barrier

Götz, M.; Götz, S.; Kratz, J. V.; Düllmann, Ch. E.; Mokry, Ch.; Runke, J.; Thörle-Pospiech, P.; Wiehl, N.; Schädel, M.; Ballof, J.; Dorrer, H.; Grund, J.; Huber, D.; Jäger, E.; Keller, O.; Krier, J.; Khuyagbaatar, J.; Lens, L.; Lommel, B.; Mendel, M.; Moody, K. J.; Scharrer, P.; Schausten, B.; Shaughnessy, D.; Schmitt, M.; Steiner, J.; Trautmann, N.; Yakushev, A.; Yakusheva, V.

doi:10.1016/j.nuclphysa.2017.02.006

Title: Radiochemical study of the kinematics of multi-nucleon transfer reactions in ⁴⁸Ca + ²⁴⁸Cm collisions 10% above the Coulomb barrier

Journal Article · Thu Feb 16 00:00:00 EST 2017 · Nuclear Physics. A

DOI:https://doi.org/10.1016/j.nuclphysa.2017.02.006· OSTI ID:1465269

Götz, M. ^[1]; Götz, S. ^[1]; Kratz, J. V. ^[2]; Düllmann, Ch. E. ^[3]; Mokry, Ch. ^[2]; Runke, J. ^[4]; Thörle-Pospiech, P. ^[2]; Wiehl, N. ^[2]; Schädel, M. ^[5]; Ballof, J. ^[1]; Dorrer, H. ^[1]; Grund, J. ^[1]; Huber, D. ^[1]; Jäger, E. ^[6]; Keller, O. ^[1]; Krier, J. ^[6]; Khuyagbaatar, J. ^[7]; Lens, L. ^[4]; Lommel, B. ^[6]; Mendel, M. ^[1] more »

Johannes Gutenberg Univ. Mainz (Germany). Inst. of Nuclear Chemistry
Johannes Gutenberg Univ. Mainz (Germany). Inst. of Nuclear Chemistry; Helmholtz Inst. Mainz (Germany)
Johannes Gutenberg Univ. Mainz (Germany). Inst. of Nuclear Chemistry; GSI Helmholtz Centre for Heavy-Ion Research, Darmstadt (Germany); Helmholtz Inst. Mainz (Germany)
Johannes Gutenberg Univ. Mainz (Germany). Inst. of Nuclear Chemistry; GSI Helmholtz Centre for Heavy-Ion Research, Darmstadt (Germany)
GSI Helmholtz Centre for Heavy-Ion Research, Darmstadt (Germany); Japan Atomic Energy Agency (JAEA), Tokai (Japan). Advanced Science Research Center
GSI Helmholtz Centre for Heavy-Ion Research, Darmstadt (Germany)
GSI Helmholtz Centre for Heavy-Ion Research, Darmstadt (Germany); Helmholtz Inst. Mainz (Germany)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

In this paper, the kinematics of multi-nucleon transfer reactions in ⁴⁸Ca + ²⁴⁸Cm collisions at 262 MeV (center of target) was investigated by using a stacked-foil technique and radiochemical separations of trans-curium elements. Trans-curium isotopes were identified by α-particle spectroscopy. For Fm isotopes, by comparing the centroids of the measured post-neutron emission isotope distributions with the most probable primary mass number predicted by Volkov's generalized $Q_{g g}$ systematics, the missing mass (number of evaporated neutrons) is estimated. The latter is compared with that deduced from the measured centroid of the laboratory angular distribution peaked closely to the grazing angle and the centroid of the range distribution, being used to determine the average total kinetic energy loss (TKEL) and the average excitation energy. The latter agrees within the uncertainties with the missing mass so that a consistent picture of the reaction mechanism emerges. For products closer to the target Z, e.g., Cf and Bk, the distributions of kinetic energies are much broader than for Fm, reflecting the fact that in the former, values of TKEL reach from quasi-elastic scattering all the way to deep inelastic scattering. Finally, the measured laboratory angular distribution and the average laboratory kinetic energy of the Fm isotopes, being the prototypes for multi-nucleon transfer products, are benchmark values for the design of electromagnetic separators to be constructed for the separation and detection of unknown neutron-rich transactinides produced in this nuclear reaction type.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Johannes Gutenberg Univ. Mainz (Germany); Helmholtz Inst. Mainz (Germany); GSI Helmholtz Centre for Heavy-Ion Research, Darmstadt (Germany)

Sponsoring Organization:: USDOE; Helmholtz Inst. Mainz (HIM) (Germany)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1465269

Report Number(s):: LLNL-JRNL-748468; 933648; TRN: US1902460

Journal Information:: Nuclear Physics. A, Vol. 961; ISSN 0375-9474

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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Title: Radiochemical study of the kinematics of multi-nucleon transfer reactions in 48Ca + 248Cm collisions 10% above the Coulomb barrier

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Title: Radiochemical study of the kinematics of multi-nucleon transfer reactions in ⁴⁸Ca + ²⁴⁸Cm collisions 10% above the Coulomb barrier