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Title: Studies of SHE at SHIP

Abstract

An overview of present experimental investigation of superheavy elements is given. The data are compared with theoretical descriptions. Results are reported from an experiment to confirm production of element 112 isotopes in irradiation of 238UF4 with 48Ca. One spontaneous fission event was measured, which agrees with three events of previously measured data which had been assigned to the decay of 283112. However, more experimental work is needed in order to obtain an independent and unambiguous confirmation of previous results.

Authors:
; ; ; ; ; ; ; ; ; ;  [1]; ; ;  [2];  [3];  [4]; ;  [5];  [6];  [7]
  1. GSI, D-64220 Darmstadt (Germany)
  2. DNP, Comenius University, SK-84248 Bratislava (Slovakia)
  3. PSI, 5232 Villigen (Switzerland)
  4. CUPP, University of Oulu (Finland)
  5. DP, University of Jyvaeskylae, FIN-40351 Jyvaeskylae (Finland)
  6. JAERI, Tokai, Ibaraki 319-1195 (Japan)
  7. FLNR at JINR, Ru-141 980 Dubna (Russian Federation) (and others)
Publication Date:
OSTI Identifier:
21061803
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 912; Journal Issue: 1; Conference: International symposium on exotic nuclei, Khanty-Mansiysk (Russian Federation), 17-22 Jul 2006; Other Information: DOI: 10.1063/1.2746598; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CALCIUM 48 REACTIONS; COMPARATIVE EVALUATIONS; ELEMENT 112 ISOTOPES; HEAVY ION FUSION REACTIONS; NUCLEAR DECAY; SPONTANEOUS FISSION; TRANSACTINIDE ELEMENTS; URANIUM 238 TARGET

Citation Formats

Hofmann, S., Ackermann, D., Burkhard, H. G., Hessberger, F. P., Kindler, B., Kojouharov, I., Lommel, B., Mann, R., Muenzenberg, G., Schoett, H. J., Sulignano, B., Antalic, S., Saro, S., Streicher, B., Dressler, R., Kuusiniemi, P., Leino, M., Uusitalo, J., Nishio, K., and Popeko, A. G. Studies of SHE at SHIP. United States: N. p., 2007. Web. doi:10.1063/1.2746598.
Hofmann, S., Ackermann, D., Burkhard, H. G., Hessberger, F. P., Kindler, B., Kojouharov, I., Lommel, B., Mann, R., Muenzenberg, G., Schoett, H. J., Sulignano, B., Antalic, S., Saro, S., Streicher, B., Dressler, R., Kuusiniemi, P., Leino, M., Uusitalo, J., Nishio, K., & Popeko, A. G. Studies of SHE at SHIP. United States. doi:10.1063/1.2746598.
Hofmann, S., Ackermann, D., Burkhard, H. G., Hessberger, F. P., Kindler, B., Kojouharov, I., Lommel, B., Mann, R., Muenzenberg, G., Schoett, H. J., Sulignano, B., Antalic, S., Saro, S., Streicher, B., Dressler, R., Kuusiniemi, P., Leino, M., Uusitalo, J., Nishio, K., and Popeko, A. G. Tue . "Studies of SHE at SHIP". United States. doi:10.1063/1.2746598.
@article{osti_21061803,
title = {Studies of SHE at SHIP},
author = {Hofmann, S. and Ackermann, D. and Burkhard, H. G. and Hessberger, F. P. and Kindler, B. and Kojouharov, I. and Lommel, B. and Mann, R. and Muenzenberg, G. and Schoett, H. J. and Sulignano, B. and Antalic, S. and Saro, S. and Streicher, B. and Dressler, R. and Kuusiniemi, P. and Leino, M. and Uusitalo, J. and Nishio, K. and Popeko, A. G.},
abstractNote = {An overview of present experimental investigation of superheavy elements is given. The data are compared with theoretical descriptions. Results are reported from an experiment to confirm production of element 112 isotopes in irradiation of 238UF4 with 48Ca. One spontaneous fission event was measured, which agrees with three events of previously measured data which had been assigned to the decay of 283112. However, more experimental work is needed in order to obtain an independent and unambiguous confirmation of previous results.},
doi = {10.1063/1.2746598},
journal = {AIP Conference Proceedings},
number = 1,
volume = 912,
place = {United States},
year = {Tue May 22 00:00:00 EDT 2007},
month = {Tue May 22 00:00:00 EDT 2007}
}
  • The nuclear shell model predicts that the next doubly magic shell-closure beyond {sup 208}Pb is at a proton number Z = 114, 120, or 126 and at a neutron number N = 184. The outstanding aim of experimental investigations is the exploration of this region of spherical 'Super-Heavy Elements'(SHEs). Experimental methods are described, which allowed for the identification of elements produced on a cross-section level of about 1 pb. Reactions used at SHIP are based on targets of lead and uranium. The decay data reveal that for the heaviest elements, the dominant decay mode is alpha emission, not fission. Decaymore » properties as well as reaction cross-sections are compared with results obtained at other laboratories and with results of theoretical investigations. Finally, plans are presented for the further development of the experimental setup and the application of new techniques, as for instance the precise mass measurement of the produced nuclei using ion traps. At increased sensitivity, detailed exploration of the region of spherical SHEs will start, after first steps on the island of SHEs were made in recent years.« less
  • The nuclear shell model predicts that the next doubly magic shell-closure beyond {sup 208}Pb is at a proton number Z = 114, 120, or 126 and at a neutron number N = 184. The outstanding aim of experimental investigations is the exploration of this region of spherical 'SuperHeavy Elements'(SHEs). Experimental methods are described, which allowed for the identification of elements produced on a cross-section level of about 1 pb. Reactions used at SHIP are based on targets of lead and uranium. The decay data reveal that for the heaviest elements, the dominant decay mode is alpha emission, not fission. Decaymore » properties as well as reaction cross-sections are compared with results obtained at other laboratories and with results of theoretical investigations. Finally, plans are presented for the further development of the experimental set-up and the application of new techniques, as for instance the precise mass measurement of the produced nuclei using ion traps. At increased sensitivity, detailed exploration of the region of spherical SHEs will start, after first steps on the island of SHEs were made in recent years.« less