Comment on ‘‘Test of Fermi gas model predictions of level density in’137

1987 ◽  
Vol 35 (4) ◽  
pp. 1598-1599
Author(s):  
G. Maino
1985 ◽  
Vol 31 (6) ◽  
pp. 2041-2048 ◽  
Author(s):  
B. Fogelberg ◽  
J. A. Harvey ◽  
M. Mizumoto ◽  
S. Raman

1973 ◽  
Vol 217 (2) ◽  
pp. 269-298 ◽  
Author(s):  
W. Dilg ◽  
W. Schantl ◽  
H. Vonach ◽  
M. Uhl
Keyword(s):  

2009 ◽  
Vol 24 (2) ◽  
pp. 82-85 ◽  
Author(s):  
Aziz Behkami ◽  
Rohallah Razavi ◽  
Tayeb Kakavand

The excited states of 73As have been investigated via the 73Ge(p, n?)73As reaction with the proton beam energies from 2.5-4.3 MeV. The parameters of the nuclear level density formula have been determined from the extensive and complete level scheme for 73As. The Bethe formula for the back-shifted Fermi gas model and the constant temperature model are compared with the experimental level densities.


2019 ◽  
Vol 26 ◽  
pp. 25
Author(s):  
N. G. Nicolis ◽  
G. S. Souliotis ◽  
A. Asimakopoulou

Mass, charge and isotopic distributions observed in spallation reactions of 56Fe with 1 GeV protons are analysed in the framework of the intranuclear cascade code ISABEL  coupled with the sequential binary decay code MECO. The code MECO provides a description of the equilibrated nuclear decay by the emission of gamma-rays, light-mass particles and clusters as well as intermediate mass fragments emitted in their ground, excited bound and excited unbound states (continuum) according to a generalized Weisskopf formalism. A good overall description of the experimental data is obtained with a global Fermi gas level density parameter and inverse cross sections based on the Christensen and Winther nuclear potential. Multifragmentation decay events are simulated with the code SMM and their influence on the above observables is discussed.


2020 ◽  
Vol 23 (2) ◽  
pp. First
Author(s):  
Duy Ngoc Nguyen

Introduction: In the present study, we evaluate the nucleon evaporation, alpha decay, and fission widths in the fusion-fission of the 58Ni+251Cf and 64Zn + 248Cm reactions for the synthesis of the super-heavy 309, 312126 nuclei. Methods: The feasibility of the synthesis of the 309, 312126 isotopes via the mentioned systems is investigated based on the widths. The widths in the excitation energy range of E* = 10 – 100 MeV are calculated in the scope of the statistical model, in which the level density is calculated by using the Fermi-gas model. By employing the LISE++ code, the level densities the compound nuclei, 309, 312126 nuclei, are calculated to be about 105 – 1050 (MeV-1) in the energy range of interest. Results: The lifetime of the compound nuclei, 309, 312126 nuclei, which are estimated based on the total width, is about 10-22-10-20 s. The fission has the largest width compared to those of the alpha decay and nucleon evaporations. Hence, the 58Ni+251Cf and 64Zn + 248Cm combinations are appropriate to the study of the mass distribution. In addition, the large alpha decay widths suggest the 309, 312126 isotopes be the alpha-decay nuclei. Conclusion: The results are expected to be useful for considering measurements at facilities in the near future.


2000 ◽  
Vol 63 (5) ◽  
pp. 752-757 ◽  
Author(s):  
V. I. Plyaskin ◽  
R. A. Kosilov
Keyword(s):  

1985 ◽  
Vol 444 (1) ◽  
pp. 113-132 ◽  
Author(s):  
M.K. Grossjean ◽  
H. Feldmeier

2018 ◽  
Vol 120 ◽  
pp. 1-120 ◽  
Author(s):  
S. Karampagia ◽  
R.A. Senkov ◽  
V. Zelevinsky

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