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Title: Nuclear fission of neutron-deficient protactinium nuclides

Abstract

Fragment velocity, kinetic energy, mass yield, and element yield distributions in the fission of neutron-deficient Pa isotopes produced in the reactions of {sup 16}O and {sup 18}O on {sup 209}Bi have been measured at incident beam energies near and above the Coulomb barriers by the time-of-flight and radiochemical methods. An asymmetric mass-division component has been observed. Measured fission cross sections were compared with the results of statistical model calculations which take into account two fission barrier heights for symmetric and asymmetric yields. The fission barrier height deduced for the asymmetric fission is found slightly lower than that for the symmetric one. The difference between the two barrier heights in the fission of the present protactinium nuclides (N{approximately}135) is considerably smaller than that in the neutron-rich nuclide of {sup 233}Pa (N{approximately}142), indicating that the difference sensitively depends on the neutron number of the fissioning nuclide. {copyright} {ital 1997} {ital The American Physical Society}

Authors:
; ; ;  [1]; ;  [2];  [3];  [4]
  1. Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki 319-11 (Japan)
  2. Faculty of Science, Tokyo Metropolitan University, Minami-Ohsawa, Hachioji, Tokyo 192-03 (Japan)
  3. School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113 (Japan)
  4. Laboratory of Nuclear Science, Tohoku University, Mikamine, Taihaku-ku, Sendai 982 (Japan)
Publication Date:
OSTI Identifier:
528171
Resource Type:
Journal Article
Journal Name:
Physical Review, C
Additional Journal Information:
Journal Volume: 56; Journal Issue: 2; Other Information: PBD: Aug 1997
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; PROTACTINIUM; NEUTRON-DEFICIENT ISOTOPES; FISSION; BISMUTH 209 TARGET; OXYGEN 16 REACTIONS; OXYGEN 18 REACTIONS; FISSION FRAGMENTS; KINETIC ENERGY; MASS; CROSS SECTIONS; STATISTICAL MODELS; TIME-OF-FLIGHT METHOD

Citation Formats

Nishinaka, I, Nagame, Y, Tsukada, K, Ikezoe, H, Sueki, K, Nakahara, H, Tanikawa, M, and Ohtsuki, T. Nuclear fission of neutron-deficient protactinium nuclides. United States: N. p., 1997. Web. doi:10.1103/PhysRevC.56.891.
Nishinaka, I, Nagame, Y, Tsukada, K, Ikezoe, H, Sueki, K, Nakahara, H, Tanikawa, M, & Ohtsuki, T. Nuclear fission of neutron-deficient protactinium nuclides. United States. https://doi.org/10.1103/PhysRevC.56.891
Nishinaka, I, Nagame, Y, Tsukada, K, Ikezoe, H, Sueki, K, Nakahara, H, Tanikawa, M, and Ohtsuki, T. 1997. "Nuclear fission of neutron-deficient protactinium nuclides". United States. https://doi.org/10.1103/PhysRevC.56.891.
@article{osti_528171,
title = {Nuclear fission of neutron-deficient protactinium nuclides},
author = {Nishinaka, I and Nagame, Y and Tsukada, K and Ikezoe, H and Sueki, K and Nakahara, H and Tanikawa, M and Ohtsuki, T},
abstractNote = {Fragment velocity, kinetic energy, mass yield, and element yield distributions in the fission of neutron-deficient Pa isotopes produced in the reactions of {sup 16}O and {sup 18}O on {sup 209}Bi have been measured at incident beam energies near and above the Coulomb barriers by the time-of-flight and radiochemical methods. An asymmetric mass-division component has been observed. Measured fission cross sections were compared with the results of statistical model calculations which take into account two fission barrier heights for symmetric and asymmetric yields. The fission barrier height deduced for the asymmetric fission is found slightly lower than that for the symmetric one. The difference between the two barrier heights in the fission of the present protactinium nuclides (N{approximately}135) is considerably smaller than that in the neutron-rich nuclide of {sup 233}Pa (N{approximately}142), indicating that the difference sensitively depends on the neutron number of the fissioning nuclide. {copyright} {ital 1997} {ital The American Physical Society}},
doi = {10.1103/PhysRevC.56.891},
url = {https://www.osti.gov/biblio/528171}, journal = {Physical Review, C},
number = 2,
volume = 56,
place = {United States},
year = {Fri Aug 01 00:00:00 EDT 1997},
month = {Fri Aug 01 00:00:00 EDT 1997}
}