Energy distribution of ternaryαparticles in spontaneous fission ofCf252

2008 ◽  
Vol 78 (6) ◽  
Author(s):  
M. Mutterer ◽  
Yu. N. Kopatch ◽  
S. R. Yamaledtinov ◽  
V. G. Lyapin ◽  
J. von Kalben ◽  
...  
1963 ◽  
Vol 15 (3) ◽  
pp. 955-955 ◽  
Author(s):  
L. Z. Malkin ◽  
I. D. Alkhazov ◽  
A. S. Krivokhatskii ◽  
K. A. Petrzhak ◽  
L. M. Belov

2019 ◽  
pp. 15-19

Influencia de la emisión de neutrones en la medición por el método de la doble energía de la distribución de masa y energía cinética de los fragmentos de la fisión espontánea del 252Cf Influence of neutron emission on the measurement by double-energy method of mass and kinetic energy distribution of the fragments from spontaneous fission of 252Cf Modesto Montoya, Carlos Romero y Justo Rojas Instituto Peruano de Energía Nuclear Universidad Nacional de Ingeniería, Av. Túpac Amaru 210, Rímac, Lima Universidad Nacional Mayor de San Marcos, Av. Venezuela, s/n, Callao DOI: https://doi.org/10.33017/RevECIPeru2011.0003/ RESUMEN El método de doble energía ha sido usado por varios autores para medir la distribución de masa (A*) y energía cinética total de los fragmentos complementarios (EKT*) de la fisión espontánea del 252Cf, encontrándose un ensanchamiento de la desviación estándar de distribución de EKT* (σEKT*) en la región cercana a la simetría de masas (A* = 226). Usando el método Monte Carlo, nosotros mostramos que ese ensanchamiento se debe que para cada valor de A* se produce la superposición de distribuciones de EKT* correspondientes a fragmentos primarios con dos o más masas vecinas, respectivamente. Descriptores: fision espontánea, 252Cf, fragmentos distribución masa energía. ABSTRACT The double energy method has been used by several authors to measure the mass (A *) and total kinetic energy (EKT *) distribution of the complementary fragments from spontaneous fission of 252Cf, finding an broadening of the distribution standard deviation EKT * (σEKT *) in the region near mass symmetry (A * = 226). Using Monte Carlo method, we show that this broadening is because for each value of A * an overlapping of distributions EKT * for primary fragments with two or more neighboring masses, respectively, are produced. Keywords: spontaneous fission 252Cf, fragments distribution mass energy.


Author(s):  
Tamotsu Ohno

The energy distribution in an electron; beam from an electron gun provided with a biased Wehnelt cylinder was measured by a retarding potential analyser. All the measurements were carried out with a beam of small angular divergence (<3xl0-4 rad) to eliminate the apparent increase of energy width as pointed out by Ichinokawa.The cross section of the beam from a gun with a tungsten hairpin cathode varies as shown in Fig.1a with the bias voltage Vg. The central part of the beam was analysed. An example of the integral curve as well as the energy spectrum is shown in Fig.2. The integral width of the spectrum ΔEi varies with Vg as shown in Fig.1b The width ΔEi is smaller than the Maxwellian width near the cut-off. As |Vg| is decreased, ΔEi increases beyond the Maxwellian width, reaches a maximum and then decreases. Note that the cross section of the beam enlarges with decreasing |Vg|.


2008 ◽  
Vol 42 (2) ◽  
pp. 125-128
Author(s):  
J. F. Al-Sharab ◽  
J. E. Wittig ◽  
G. Bertero ◽  
T. Yamashita ◽  
J. Bentley ◽  
...  

1979 ◽  
Vol 40 (C7) ◽  
pp. C7-385-C7-386
Author(s):  
S. Bourquard ◽  
J. M. Mayor ◽  
P. Kocian

1987 ◽  
Vol 48 (C6) ◽  
pp. C6-141-C6-146 ◽  
Author(s):  
M. Komuro ◽  
T. Kato

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