caa a22 4500 465729193 CHVBK 20180323111736.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF02039465 doi (NATIONALLICENCE)springer-10.1007/BF02039465 Systematic behavior of mass-yield curves in low-energy fission of actinides [Elektronische Daten] [H. Nakahara, T. Ohtsuki] Mass yield curves of spontaneous fissions, thermal-neutron induced fissions, monochromatic-neutron and proton induced fissions of actinides are reviewed. Mean masses of light and heavy asymmetric mass yield peaks are listed. The subtle change of the shape of the asymmetric heavy peak is expressed in terms of the parameters of two Gaussians that fit the observed data well. One Gaussian is narrow in width and always peaks at A=133-136 while the other is broader and peaks at A=140−144. The FWHM of the heavy asymmetric peak becomes minimum for the fissioning mass A=240−245. An analysis of the projectile energy dependence of mass yield curves indicated, at least, two distinctively different behaviors, one for asymmetric products and the other for symmetric products. From the energy dependence of the peak-to-valley rations, the "extra-energy” required for symmetric mass division, or the difference in the fission barrier heights, in the nomeuclature of the two-mode hypothesis, is deduced for a wide range of fission nuclides. Akadémiai Kiadó, 1990 Nakahara H. Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Fukasawa, Setagaya, 158, Tokyo, (Japan) aut Ohtsuki T. Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Fukasawa, Setagaya, 158, Tokyo, (Japan) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 142/1(1990-09-01), 231-251 0236-5731 142:1<231 1990 142 10967 https://doi.org/10.1007/BF02039465 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02039465 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nakahara H. Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Fukasawa, Setagaya, 158, Tokyo, (Japan) aut NATIONALLICENCE 700 1- Ohtsuki T. Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Fukasawa, Setagaya, 158, Tokyo, (Japan) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 142/1(1990-09-01), 231-251 0236-5731 142:1<231 1990 142 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer