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Title: First superheavy element experiments at the GSI recoil separator TASCA: The production and decay of element 114 in the {sup 244}Pu({sup 48}Ca,3-4n) reaction

Abstract

Experiments with the new recoil separator, Transactinide Separator and Chemistry Apparatus (TASCA), at the GSI were performed by using beams of {sup 48}Ca to irradiate targets of {sup 206-208}Pb, which led to the production of {sup 252-254}No isotopes. These studies allowed for evaluation of the performance of TASCA when coupled to a new detector and electronics system. By following these studies, the isotopes of element 114 ({sup 288-291}114) were produced in irradiations of {sup 244}Pu targets with {sup 48}Ca beams at compound nucleus excitation energies around 41.7 and 37.5 MeV, demonstrating TASCA's ability to perform experiments with picobarn-level cross sections. A total of 15 decay chains were observed and were assigned to the decay of {sup 288-291}114. A new {alpha}-decay branch in {sup 281}Ds was observed, leading to the new nucleus {sup 277}Hs.

Authors:
 [1];  [2];  [3];  [1];  [2];  [2]; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ;  [1] « less
  1. GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, D-64291 Darmstadt (Germany)
  2. (Germany)
  3. (United States)
Publication Date:
OSTI Identifier:
21502489
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 83; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.83.054618; (c) 2011 American Institute of Physics; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALPHA DECAY; CALCIUM 48 REACTIONS; CHAINS; CROSS SECTIONS; DARMSTADTIUM 281; ELEMENT 114; EXCITATION; HASSIUM 276; HASSIUM ISOTOPES; LEAD 206 TARGET; LEAD 207 TARGET; LEAD 208 TARGET; MEV RANGE 10-100; NEUTRON EMISSION; NOBELIUM 252; NOBELIUM 253; NOBELIUM 254; PLUTONIUM 244 TARGET; RECOILS; ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; BETA DECAY RADIOISOTOPES; DARMSTADTIUM ISOTOPES; DECAY; ELECTRON CAPTURE RADIOISOTOPES; ELEMENTS; EMISSION; ENERGY RANGE; ENERGY-LEVEL TRANSITIONS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HEAVY ION REACTIONS; HEAVY NUCLEI; HOURS LIVING RADIOISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MEV RANGE; MILLISECONDS LIVING RADIOISOTOPES; MINUTES LIVING RADIOISOTOPES; NOBELIUM ISOTOPES; NUCLEAR DECAY; NUCLEAR REACTIONS; NUCLEI; RADIOISOTOPES; SECONDS LIVING RADIOISOTOPES; SPONTANEOUS FISSION RADIOISOTOPES; TARGETS; TRANSACTINIDE ELEMENTS; TRANSPLUTONIUM ELEMENTS; TRANSURANIUM ELEMENTS

Citation Formats

Gates, J. M., Technische Universitaet Muenchen, D-85748 Garching, Lawrence Berkeley National Laboratory, Berkeley, California 94720-8169, Duellmann, Ch. E., Johannes Gutenberg-Universitaet Mainz, D-55099 Mainz, Helmholtz Institute Mainz, D-55099 Mainz, Schaedel, M., Ackermann, D., Block, M., Bruechle, W., Essel, H. G., Hartmann, W., Hessberger, F. P., Huebner, A., Jaeger, E., Khuyagbaatar, J., Kindler, B., Krier, J., Kurz, N., Lommel, B., Schaffner, H., Schausten, B., Schimpf, E., and Steiner, J. First superheavy element experiments at the GSI recoil separator TASCA: The production and decay of element 114 in the {sup 244}Pu({sup 48}Ca,3-4n) reaction. United States: N. p., 2011. Web. doi:10.1103/PHYSREVC.83.054618.
Gates, J. M., Technische Universitaet Muenchen, D-85748 Garching, Lawrence Berkeley National Laboratory, Berkeley, California 94720-8169, Duellmann, Ch. E., Johannes Gutenberg-Universitaet Mainz, D-55099 Mainz, Helmholtz Institute Mainz, D-55099 Mainz, Schaedel, M., Ackermann, D., Block, M., Bruechle, W., Essel, H. G., Hartmann, W., Hessberger, F. P., Huebner, A., Jaeger, E., Khuyagbaatar, J., Kindler, B., Krier, J., Kurz, N., Lommel, B., Schaffner, H., Schausten, B., Schimpf, E., & Steiner, J. First superheavy element experiments at the GSI recoil separator TASCA: The production and decay of element 114 in the {sup 244}Pu({sup 48}Ca,3-4n) reaction. United States. doi:10.1103/PHYSREVC.83.054618.
Gates, J. M., Technische Universitaet Muenchen, D-85748 Garching, Lawrence Berkeley National Laboratory, Berkeley, California 94720-8169, Duellmann, Ch. E., Johannes Gutenberg-Universitaet Mainz, D-55099 Mainz, Helmholtz Institute Mainz, D-55099 Mainz, Schaedel, M., Ackermann, D., Block, M., Bruechle, W., Essel, H. G., Hartmann, W., Hessberger, F. P., Huebner, A., Jaeger, E., Khuyagbaatar, J., Kindler, B., Krier, J., Kurz, N., Lommel, B., Schaffner, H., Schausten, B., Schimpf, E., and Steiner, J. Sun . "First superheavy element experiments at the GSI recoil separator TASCA: The production and decay of element 114 in the {sup 244}Pu({sup 48}Ca,3-4n) reaction". United States. doi:10.1103/PHYSREVC.83.054618.
@article{osti_21502489,
title = {First superheavy element experiments at the GSI recoil separator TASCA: The production and decay of element 114 in the {sup 244}Pu({sup 48}Ca,3-4n) reaction},
author = {Gates, J. M. and Technische Universitaet Muenchen, D-85748 Garching and Lawrence Berkeley National Laboratory, Berkeley, California 94720-8169 and Duellmann, Ch. E. and Johannes Gutenberg-Universitaet Mainz, D-55099 Mainz and Helmholtz Institute Mainz, D-55099 Mainz and Schaedel, M. and Ackermann, D. and Block, M. and Bruechle, W. and Essel, H. G. and Hartmann, W. and Hessberger, F. P. and Huebner, A. and Jaeger, E. and Khuyagbaatar, J. and Kindler, B. and Krier, J. and Kurz, N. and Lommel, B. and Schaffner, H. and Schausten, B. and Schimpf, E. and Steiner, J.},
abstractNote = {Experiments with the new recoil separator, Transactinide Separator and Chemistry Apparatus (TASCA), at the GSI were performed by using beams of {sup 48}Ca to irradiate targets of {sup 206-208}Pb, which led to the production of {sup 252-254}No isotopes. These studies allowed for evaluation of the performance of TASCA when coupled to a new detector and electronics system. By following these studies, the isotopes of element 114 ({sup 288-291}114) were produced in irradiations of {sup 244}Pu targets with {sup 48}Ca beams at compound nucleus excitation energies around 41.7 and 37.5 MeV, demonstrating TASCA's ability to perform experiments with picobarn-level cross sections. A total of 15 decay chains were observed and were assigned to the decay of {sup 288-291}114. A new {alpha}-decay branch in {sup 281}Ds was observed, leading to the new nucleus {sup 277}Hs.},
doi = {10.1103/PHYSREVC.83.054618},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 5,
volume = 83,
place = {United States},
year = {2011},
month = {5}
}