Erratum to ``Multiplicity and energy of neutrons from 235U(nth,f) fission fragments

Abstract The correlation between fission fragments and prompt neutrons from the reaction 235U(nth,f) was measured with improved accuracy. The results determined the neutron multiplicity and emission energy as a function of fragment mass and/or total kinetic energy. The average multiplicity as a function of fragment mass followed a saw-tooth distribution and the distribution of average energy with mass had a bell-shaped distribution centered about the equal-mass split. The slope of the neutron multiplicity with kinetic energy had a saw-tooth distribution with a minimum at m ∗ ≈ 130 . The total excitation energy implied by the measurements was consistent with energy conservation and had a concave distribution with heavy-fragment mass, with a flat minimum between m ∗ ≈ 132 and 152 , suggesting that fragment pairs are preferentially formed in a compact configuration at the scission point.

[1]  P. Möller,et al.  Atomic masses and nuclear ground-state deformations calculated with a new macroscopic-microscopic model , 1981 .

[2]  V. Weisskopf,et al.  Theoretical Nuclear Physics , 1953 .

[3]  W. R. Burrus,et al.  CALIBRATION OF AN ORGANIC SCINTILLATOR FOR NEUTRON SPECTROMETRY. , 1968 .

[4]  W. Westmeier,et al.  252Cf: neutron multiplicities in correlation with fission-fragment mass and energy , 1994 .

[5]  V. F. Apalin,et al.  Neutron emission from U233, U235 and Pu239 fission fragments , 1965 .

[6]  C. Budtz-Jørgensen,et al.  Simultaneous investigation of fission fragments and neutrons in 252Cf (SF) , 1988 .

[7]  F. Brisard,et al.  Pulse height defect in an ionization chamber investigated by cold fission measurements , 1990 .

[8]  T. Fan,et al.  Study of multichannel theory for the neutron induced fissions of actinide nuclei , 1995 .

[9]  A. Gavron Correction of experimental results in fission experiments , 1974 .

[10]  H. Schmitt,et al.  PROMPT GAMMA RAYS EMITTED IN THE THERMAL-NEUTRON-INDUCED FISSION OF $sup 235$U. , 1972 .

[11]  R. Choudhury,et al.  Prompt neutron emission spectra and multiplicities in the thermal neutron induced fission of235U , 1993 .

[12]  Cyriel Wagemans,et al.  The Nuclear Fission Process , 1991 .

[13]  I. Kimura,et al.  Measurement of Fragment Mass Dependent Kinetic Energy and Neutron Multiplicity for Thermal Neutron Induced Fission of Plutonium-239 , 1995 .

[14]  N. Bianchi,et al.  Phenomenological statistical analysis of level densities, decay widths and lifetimes of excited nuclei , 1992 .

[15]  A. Naqvi,et al.  Fragment velocities, energies, and masses from fast neutron induced fission of U 235 , 1984 .

[16]  J. Boldeman,et al.  PROMPT NEUTRONS FROM $sup 236$U FISSION FRAGMENTS. , 1971 .

[17]  D. W. Lang,et al.  Neutron evaporation and level densities in excited nuclei , 1959 .

[18]  J. Ziegler,et al.  stopping and range of ions in solids , 1985 .

[19]  I. Kimura,et al.  A system for correlation measurement of fission fragments and prompt neutrons for thermal neutron induced fission , 1997 .

[20]  D. Madland,et al.  Prompt fission neutron spectra and average prompt neutron multiplicities , 1982 .