scholarly journals Threshold Effects in Proton-induced Reactions on Copper

1978 ◽  
Vol 31 (4) ◽  
pp. 253 ◽  
Author(s):  
ZE Switkowski ◽  
JCP Heggie ◽  
FM Mann
Keyword(s):  
Charged Particle ◽  
Statistical Model ◽  
Energy Range ◽  
Threshold Effect ◽  
Reaction Yield ◽  
Threshold Effects ◽  
Excitation Functions ◽  
Model Calculations ◽  
Copper Isotopes ◽  
Proton Induced Reactions

A study has been made of proton-induced reactions on the two copper isotopes 65CU and 63CU for bombarding energies in the range 1�2-4�6 MeV. This energy range includes the (p,n) thresholds for 65CU and 63CU, which occur at 2�17MeV and 4�21 MeV respectively. Excitation functions for (p, y) reactions were obtained by observing discrete y-ray transitions between low-lying states of the compound nuclei. Data were also obtained for the charged-particle reactions 65Cu(p,lXo)62Ni and 63CU(p, lXo.,)6�Ni. As the respective (p, n) thresholds are crossed, the yields of proton-induced reactions on 65CU fall by a factor of about 5 while the excitation functions of proton-induced reactions on 63CU reveal no evidence of a significant threshold effect. These data are ompared with Hauser-Feshbach statistical model calculations. The structure in the 65CU+p reaction yield is interpreted in terms of Wigner cusps.

scholarly journals Absolute Cross Sections of Proton Induced Reactions on 65Cu, 64Ni and 63Cu

1983 ◽  
Vol 36 (4) ◽  
pp. 463 ◽  
Author(s):  
ME Sevior ◽  
LW Mitchell ◽  
MR Anderson ◽  
CIW Tingwell ◽  
DG Sargood
Keyword(s):  
Statistical Model ◽  
Energy Range ◽  
Cross Sections ◽  
Proton Energy ◽  
Closed Shell ◽  
Shell Effect ◽  
Model Calculations ◽  
Proton Induced Reactions ◽  
Theory And Experiment

Absolute cross sections have been measured for (p, y) reactions on 63CU, 64Ni and 63CU over proton energy ranges of 1,05-3 '25, 1�00-3 �45 and 1�05-4� 70 MeV respectively, for (p, n) reactions over proton energy ranges from threshold to 3� 25,3' 80 and 4�86 MeV respectively, and for 63CU(p, p')63CU over a proton energy range of 1�05-4'00 MeV. All the data are compared with global statistical model calculations. The agreement, to within a factor of 2, between theory and experiment is regarded as satisfactory for a global code, but the 64Ni data are suggestive of a closed shell effect at Z = 28.

scholarly journals Statistical model calculations of 72,73Ge(n,p) and 72,74Ge(n,α) reactions on natural Ge

2020 ◽  
Vol 15 ◽  
pp. 104
Author(s):  
S. Galanopoulos ◽  
R. Vlastou ◽  
P. Demetriou ◽  
M. Kokkoris ◽  
C. T. Papadopoulos ◽  
...  
Keyword(s):  
Statistical Model ◽  
Energy Range ◽  
Neutron Energy ◽  
Cross Sections ◽  
Reaction Cross ◽  
Model Calculations ◽  
Monoenergetic Neutron ◽  
Theoretical Investigations ◽  
Equilibrium Emission ◽  
Reaction Cross Sections

Systematic experimental and theoretical investigations of the 72,73Ge(n,p)72,73 Ga and 72,74Ge(n,α)69,71Znm reaction cross sections are presented in the energy range from thresh- old to about 17 MeV neutron energy. The above reaction cross sections were measured from 8.8 to 11.4 MeV by using the activation method, relative to the 27Al(n,α)24Na refer- ence reaction. The quasi-monoenergetic neutron beams were produced via the 2H(d,n)3He reaction at the 5 MV VdG Tandem T11/25 accelerator of NCSR “Demokritos”. Statisti- cal model calculations using the code EMPIRE-II (version 2.19) taking into consideration pre-equilibrium emission were performed on the data measured in this work as well as on data reported in literature.

scholarly journals Evaluation of neutron induced reactions on 56Fe with CONRAD

2020 ◽  
Vol 239 ◽  
pp. 11005 ◽  
Author(s):  
M. Diakaki ◽  
S. Chen ◽  
G. Noguere ◽  
D. Bernard ◽  
P. Tamagno ◽  
...  
Keyword(s):  
Statistical Model ◽  
Energy Range ◽  
Fast Neutron ◽  
Neutron Energy ◽  
Resonance Region ◽  
Covariance Matrices ◽  
Neutron Energy Range ◽  
Model Calculations ◽  
First Results ◽  
The Continuum

The evaluation of the 56Fe neutron induced reactions is currently ongoing at the CEA-Cadarache using the code CONRAD, with the goal to cover the whole energy range from the Resolved Resonance Region to the continuum and estimate the corresponding uncertainties and covariance matrices. Some first results and issues occurred from this work are presented and discussed here, more specifically on the analysed transmission and capture data in the Resolved Resonance Region, as well as the optical and statistical model calculations in the fast neutron energy range.

MEASUREMENT AND ANALYSIS OF EXCITATION FUNCTIONS FOR ALPHA-INDUCED REACTIONS IN BISMUTH

1992 ◽  
Vol 01 (04) ◽  
pp. 823-831 ◽  
Author(s):  
B. P. SINGH ◽  
M. G. V. SANKARACHARYULU ◽  
M. A. ANSARI ◽  
R. PRASAD ◽  
H. D. BHARDWAJ
Keyword(s):  
Energy Range ◽  
Compound Nucleus ◽  
Projectile Energy ◽  
Exciton Model ◽  
Excitation Functions ◽  
Model Calculations ◽  
Stacked Foil Technique ◽  
Measurement And Analysis ◽  
Foil Technique

Excitation functions for 209 Bi (α, 3n), 209 Bi (α, 4n) and 209 Bi (α, 5n) reactions have been measured in the energy range threshold to ≈50 MeV using stacked foil technique. Excitation functions have also been theoretically calculated and as expected, inclusion of pre-equilibrium contribution based on exciton model calculations along with compound nucleus calculations using Hauser–Feshbach formalism reproduces well the measured excitation functions. Interesting trend in the ratio of pre-equilibrium to equilibrium component with projectile energy has been observed.

PECULIARITIES OF NUCLEAR REACTIONS INDUCED BY 6He AND 6Li NUCLEI NEAR THE COULOMB BARRIER

2008 ◽  
Vol 17 (10) ◽  
pp. 2349-2353 ◽  
Author(s):  
YU. E. PENIONZHKEVICH ◽  
R. KALPAKCHIEVA ◽  
A. A. KULKO ◽  
S. M. LUKYANOV ◽  
V. A. MASLOV ◽  
...  
Keyword(s):  
Statistical Model ◽  
Cross Section ◽  
Coulomb Barrier ◽  
Nuclear Reactions ◽  
Transfer Reactions ◽  
Excitation Functions ◽  
Model Calculations ◽  
The Cross ◽  
Evaporation Residues

Excitation functions for evaporation residues in the reactions 206,208 Pb (6,4 He,2n 210 Po , as well as for the transfer reactions in the interaction of 6 He and 6 Li projectiles with Au and Pt were measured at the energies near the Coulomb barrier. Studied reactions were characterized by an increase in the cross-section compared to statistical model calculations.

scholarly journals Statistical model calculations of the 7Li +11 Β reaction

2019 ◽  
Vol 10 ◽  
pp. 165
Author(s):  
C. Tsabaris ◽  
C. T. Papadopoulos ◽  
R. Vlastou ◽  
A. A. Pakou ◽  
P. A. Assimakopoulos ◽  
...  
Keyword(s):  
Experimental Data ◽  
Statistical Model ◽  
Energy Range ◽  
Cross Section ◽  
Compound Nucleus ◽  
Cross Sections ◽  
Coulomb Barrier ◽  
Reaction Channel ◽  
Model Calculations ◽  
The Individual

The 7Li + 11 Β reaction has been studied in the energy range from a little below to about three times the Coulomb barrier by measuring the cross section of the 7- ray transitions in the residual nuclei produced. Statistical compound nucleus calculations have been performed in order to interpret the experimental data as well as to extract cross sections of the individual exit channels. The statistical compound nucleus theory can reproduce rather well the absolute j - ray and the various reaction channel excitation functions.

Excitation functions of proton-induced reactions in natCu in the energy range 7–17MeV

2009 ◽  
Vol 67 (11) ◽  
pp. 2037-2039 ◽  
Author(s):  
T. Siiskonen ◽  
J. Huikari ◽  
T. Haavisto ◽  
J. Bergman ◽  
S.-J. Heselius ◽  
...  
Keyword(s):  
Energy Range ◽  
Excitation Functions ◽  
Proton Induced Reactions
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