DETAILED INVESTIGATION OF THE THERMAL-NEUTRON INDUCED TERNARY FISSION OF U-235

被引:31
作者
GUET, C
SIGNARBIEUX, C
PERRIN, P
NIFENECKER, H
ASGHAR, M
CAITUCOLLI, F
LEROUX, B
机构
[1] Institut Laue-Langevin, 156X Centre de Tri
关键词
Nuclear fission;
D O I
10.1016/0375-9474(79)90551-7
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
The energy and angular distributions of the long-range α-particles released in the thermal neutron induced fission of 235U have been measured as a function of the mass and kinetic energy of the fission fragments. Only one of the fission fragments was detected, its mass being determined by kinetic energy and time-of-flight measurements. The dependence of the light particle kinetic energy spectra on its final direction is examined as a function of mass and kinetic energy of the fission fragments. The angular distribution of all α-particles with respect to the light fragment direction has a most probable value of 81.3°±0.5° with a dispersion (FWHM) of 18.5°±0.8° which compares very well to the angular spread measured in the spontaneous fission of 252Cf. Other striking similarities between the ternary fission of 236U and 252Cf are pointed out. A positive correlation between the mean emission angle and the mass of the light fragment resolves the controversy which remained on this point up to now. The influence of the total fragment kinetic energy on the width of the angular distribution is investigated in detail. A preliminary interpretation of our data shows that α-accompanied fission should no longer be considered as contradictory to the semi-statistical models of fission. © 1979.
引用
收藏
页码:1 / 26
页数:26
相关论文
共 47 条
  • [1] ADAMOV VM, 1970, JETP SOV PHYS, V10, P416
  • [2] Alvarez L. W., 1947, PHYS REV, V71, P327
  • [3] A MULTI-PARAMETER STUDY OF LRA FISSION AND BINARY FISSION OF U-235 WITH THERMAL NEUTRONS
    ASGHAR, M
    CARLES, C
    CHASTEL, R
    DOAN, TP
    RIBRAG, M
    SIGNARBIEUS, C
    [J]. NUCLEAR PHYSICS A, 1970, A145 (02) : 657 - +
  • [4] INVESTIGATION OF LRA FISSION OF U-235 BY NON-SHIELDED SEMICONDUCTOR TELESCOPE
    BAYER, R
    CVANDA, J
    DLOUHY, Z
    KVITEK, J
    WILHELM, I
    [J]. CZECHOSLOVAK JOURNAL OF PHYSICS, 1974, B 24 (07) : 743 - 747
  • [5] EXPERIMENTAL STUDY OF TERNARY FISSION OF U-235 WITH THERMAL AND RESONANCE NEUTRONS
    BISCHOF, J
    DLOUHY, Z
    KVITEK, J
    POPOV, YP
    [J]. CZECHOSLOVAK JOURNAL OF PHYSICS, 1973, B 23 (08) : 809 - 816
  • [6] BLOCKI J, 1977, LBL6536 PREPR
  • [7] CALCULATIONS OF ALPHA-PARTICLE TRAJECTORIES FOR LONG-RANGE ALPHA PARTICLES EMITTED IN SPONTANEOUS FISSION
    BONEH, Y
    FRAENKEL, Z
    NEBENZAHL, I
    [J]. PHYSICAL REVIEW, 1967, 156 (04): : 1305 - +
  • [8] MICROSCOPIC AND MACROSCOPIC CALCULATIONS OF ONE-BODY DAMPING IN FISSION
    BONEH, Y
    BLOCKI, JP
    MYERS, WD
    [J]. PHYSICS LETTERS B, 1976, 63 (03) : 265 - 268
  • [9] SCISSION POINT CONFIGURATION OF THERMAL-NEUTRON INDUCED FISSION OF U-235
    BROWN, CS
    FONG, P
    [J]. PHYSICAL REVIEW C, 1977, 16 (01): : 243 - 250
  • [10] ORIGIN OF SCISSION-ALPHA PARTICLES
    CARJAN, N
    [J]. JOURNAL DE PHYSIQUE, 1976, 37 (11): : 1279 - 1285