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Title: Cross section systematics for the lightest Bi and Po nuclei produced in complete fusion reactions with heavy ions

Abstract

The production of the very neutron-deficient nuclides {sup 184-192}Bi and {sup 186-192}Po in the vicinity of the neutron midshell at N = 104 has been studied by using heavy-ion-induced complete fusion reactions in a series of experiments at the velocity filter SHIP. The cross sections for the xn and pxn evaporation channels of the {sup 46}Ti+{sup 144}Sm{yields}{sup 190}Po*,{sup 98}Mo+{sup 92}Mo{yields}{sup 190}Po*,{sup 50,52}Cr+{sup 142}Nd{yields}{sup 192,194}Po*, and {sup 94,95}Mo+{sup 93}Nb{yields}{sup 187,188}Bi* reactions were measured. The results obtained, together with the previously known cross section data for the heavier Bi and Po nuclides, are compared with the results of statistical model calculations carried out with the HIVAP code. It is shown that a satisfactory description of the experimental data requires a significant (up to 35%) reduction of the theoretical fission barriers. The optimal reactions for production of the lightest Bi and Po isotopes are discussed.

Authors:
 [1]; ;  [2]; ; ;  [3]; ; ;  [4];  [5]; ; ; ; ; ;  [2];  [2]; ; ;  [6]
  1. TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, V6T 2A3 (Canada)
  2. Gesellschaft fur Schwerionenforschung (GSI), Planckstrasse 1, D-64291 Darmstadt (Germany)
  3. Department of Nuclear Physics, Comenius University, Bratislava (Slovakia)
  4. Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom)
  5. Institut fuer Physik, Johannes Gutenberg-Universitaet, Staudingerweg 7, D-55099 Mainz (Germany)
  6. Instituut voor Kern- en Stralingsfysica, University of Leuven, Celestijnenlaan 200 D, B-3001 Leuven (Belgium)
Publication Date:
OSTI Identifier:
20698842
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 72; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevC.72.014612; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BISMUTH 186; BISMUTH 188; BISMUTH 189; BISMUTH 192; CHROMIUM 52 REACTIONS; CROSS SECTIONS; FISSION BARRIER; MOLYBDENUM 92 TARGET; MOLYBDENUM 95; MOLYBDENUM 98 REACTIONS; NEODYMIUM 142 TARGET; POLONIUM 188; POLONIUM 190; POLONIUM 192; SAMARIUM 144 TARGET; STATISTICAL MODELS; TITANIUM 46 REACTIONS

Citation Formats

Andreyev, A N, Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, Instituut voor Kern- en Stralingsfysica, University of Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Ackermann, D, Muenzenberg, G, Institut fuer Physik, Johannes Gutenberg-Universitaet, Staudingerweg 7, D-55099 Mainz, Antalic, S, Saro, S, Streicher, B, Darby, I G, Page, R D, Wiseman, D R, Franchoo, S, ISOLDE, CERN, CH-1211 Geneva 23, Hessberger, F P, Kuusiniemi, P, Lommel, B, Kindler, B, Mann, R, Sulignano, B, Hofmann, S, Physikalisches Institut, J.W. Goethe-Universitaet, D-60054 Frankfurt, Huyse, M, Vel, K van de, and Duppen, P van. Cross section systematics for the lightest Bi and Po nuclei produced in complete fusion reactions with heavy ions. United States: N. p., 2005. Web. doi:10.1103/PhysRevC.72.014612.
Andreyev, A N, Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, Instituut voor Kern- en Stralingsfysica, University of Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Ackermann, D, Muenzenberg, G, Institut fuer Physik, Johannes Gutenberg-Universitaet, Staudingerweg 7, D-55099 Mainz, Antalic, S, Saro, S, Streicher, B, Darby, I G, Page, R D, Wiseman, D R, Franchoo, S, ISOLDE, CERN, CH-1211 Geneva 23, Hessberger, F P, Kuusiniemi, P, Lommel, B, Kindler, B, Mann, R, Sulignano, B, Hofmann, S, Physikalisches Institut, J.W. Goethe-Universitaet, D-60054 Frankfurt, Huyse, M, Vel, K van de, & Duppen, P van. Cross section systematics for the lightest Bi and Po nuclei produced in complete fusion reactions with heavy ions. United States. https://doi.org/10.1103/PhysRevC.72.014612
Andreyev, A N, Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, Instituut voor Kern- en Stralingsfysica, University of Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Ackermann, D, Muenzenberg, G, Institut fuer Physik, Johannes Gutenberg-Universitaet, Staudingerweg 7, D-55099 Mainz, Antalic, S, Saro, S, Streicher, B, Darby, I G, Page, R D, Wiseman, D R, Franchoo, S, ISOLDE, CERN, CH-1211 Geneva 23, Hessberger, F P, Kuusiniemi, P, Lommel, B, Kindler, B, Mann, R, Sulignano, B, Hofmann, S, Physikalisches Institut, J.W. Goethe-Universitaet, D-60054 Frankfurt, Huyse, M, Vel, K van de, and Duppen, P van. 2005. "Cross section systematics for the lightest Bi and Po nuclei produced in complete fusion reactions with heavy ions". United States. https://doi.org/10.1103/PhysRevC.72.014612.
@article{osti_20698842,
title = {Cross section systematics for the lightest Bi and Po nuclei produced in complete fusion reactions with heavy ions},
author = {Andreyev, A N and Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE and Instituut voor Kern- en Stralingsfysica, University of Leuven, Celestijnenlaan 200 D, B-3001 Leuven and Ackermann, D and Muenzenberg, G and Institut fuer Physik, Johannes Gutenberg-Universitaet, Staudingerweg 7, D-55099 Mainz and Antalic, S and Saro, S and Streicher, B and Darby, I G and Page, R D and Wiseman, D R and Franchoo, S and ISOLDE, CERN, CH-1211 Geneva 23 and Hessberger, F P and Kuusiniemi, P and Lommel, B and Kindler, B and Mann, R and Sulignano, B and Hofmann, S and Physikalisches Institut, J.W. Goethe-Universitaet, D-60054 Frankfurt and Huyse, M and Vel, K van de and Duppen, P van},
abstractNote = {The production of the very neutron-deficient nuclides {sup 184-192}Bi and {sup 186-192}Po in the vicinity of the neutron midshell at N = 104 has been studied by using heavy-ion-induced complete fusion reactions in a series of experiments at the velocity filter SHIP. The cross sections for the xn and pxn evaporation channels of the {sup 46}Ti+{sup 144}Sm{yields}{sup 190}Po*,{sup 98}Mo+{sup 92}Mo{yields}{sup 190}Po*,{sup 50,52}Cr+{sup 142}Nd{yields}{sup 192,194}Po*, and {sup 94,95}Mo+{sup 93}Nb{yields}{sup 187,188}Bi* reactions were measured. The results obtained, together with the previously known cross section data for the heavier Bi and Po nuclides, are compared with the results of statistical model calculations carried out with the HIVAP code. It is shown that a satisfactory description of the experimental data requires a significant (up to 35%) reduction of the theoretical fission barriers. The optimal reactions for production of the lightest Bi and Po isotopes are discussed.},
doi = {10.1103/PhysRevC.72.014612},
url = {https://www.osti.gov/biblio/20698842}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 1,
volume = 72,
place = {United States},
year = {Fri Jul 01 00:00:00 EDT 2005},
month = {Fri Jul 01 00:00:00 EDT 2005}
}