scholarly journals Proton capture reaction cross section measurements on Er162 as a probe of statistical model calculations

2017 ◽  
Vol 96 (4) ◽  
Author(s):  
N. Özkan ◽  
R. T. Güray ◽  
C. Yalçın ◽  
W. P. Tan ◽  
A. Aprahamian ◽  
...  
Keyword(s):  
Statistical Model ◽  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Proton Capture ◽  
Model Calculations ◽  
Capture Reaction

scholarly journals Study of the (n,2n) reaction cross section on 174,176Hf isotopes

2020 ◽  
Vol 15 ◽  
pp. 188
Author(s):  
M. Serris ◽  
Et Al.
Keyword(s):  
Statistical Model ◽  
Cross Section ◽  
Neutron Energy ◽  
Energy Region ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Activation Technique ◽  
Tandem Accelerator ◽  
Model Calculations ◽  
Input Parameters

Cross section measurements of the 174Hf(n,2n)173Hf and 176Hf(n,2n)175Hf reactions have been performed at the VdG Tandem accelerator of NCSR “Demokritos” in Athens, in the neutron energy region from 8.8 to 11.5 MeV, using the activation technique. Statistical model calculations based on the Hauser - Feshbach theory have also been implemented by using the code EMPIRE-II with different sets of input parameters. The predictions were compared to the data of the present work as well as data from literature.

scholarly journals Alpha capture reaction cross section measurements on Sb isotopes by activation method

2016 ◽  
Vol 665 ◽  
pp. 012042 ◽  
Author(s):  
Z Korkulu ◽  
N Özkan ◽  
G G Kiss ◽  
T Szücs ◽  
Zs Fülöp ◽  
...  
Keyword(s):  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Activation Method ◽  
Capture Reaction ◽  
Alpha Capture

scholarly journals Cross Section Measurements in the 54Cr(p, ?)55Mn Reaction

1979 ◽  
Vol 32 (4) ◽  
pp. 335 ◽  
Author(s):  
R. J. Wilkinson ◽  
A S. R. Kennett ◽  
A Z. E. Switkowski ◽  
D. G. SargoodA and F. M. MannC
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Reaction Cross Section ◽  
Proton Energy ◽  
Gamma Ray ◽  
Reaction Cross ◽  
Model Calculations ◽  
Global Parameter ◽  
Dramatic Effect ◽  
Bombarding Energy

Cross sections for production of individual y rays in the 54Cr(p, y)55Mn reaction have been measured over the proton energy range 1�0-3�8 MeV. Gamma-ray yields are observed to fall by factors of between 5 and 10 at the crossing of the neutron threshold for a proton bombarding energy of 2�2 MeV. Statistical model calculations with global parameter sets successfully account for the dramatic effect of neutron competition on the (p, y) cross section, and at the same time correctly predict the 54Cr(p,n)54Mn reaction cross section.

Statistical Model Approach to (n,p) Reaction Cross Section Systematics

2002 ◽  
Vol 39 (sup2) ◽  
pp. 782-784 ◽  
Author(s):  
Gonchigdorj Khuukhenkhuu ◽  
Ganjuur Unenbat ◽  
Yuri Gledenov ◽  
Milana Sedysheva
Keyword(s):  
Statistical Model ◽  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Model Approach

scholarly journals Isomeric Cross Section Study of neutron induced reactions on Ge

2020 ◽  
Vol 16 ◽  
pp. 169
Author(s):  
R. Vlastou ◽  
S. Galanopoulos ◽  
C. T. Papadopoulos ◽  
M. Kokkoris ◽  
M. Serris ◽  
...  
Keyword(s):  
Statistical Model ◽  
Cross Section ◽  
Cross Sections ◽  
Reaction Cross ◽  
Model Calculations ◽  
Section Study ◽  
Reaction Cross Sections

The72Ge(n,α)69mZn, 74Ge(n,α)71mZn, 76Ge(n,2n)75g+mGe reaction cross sections have been measured from 9.6 to 11.4 MeV and studied, along with data from litera- ture, within the frame of statistical model calculations by using the code EMPIRE-II.

Systematic study of the (n,2n) reaction cross section for 121Sb and 123Sb isotopes

2022 ◽  
Author(s):  
RATANKUMAR SINGH ◽  
N.L. Singh ◽  
Rakesh Chauhan ◽  
Mayur Mehta ◽  
Saraswatula suryanarayan ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Systematic Study ◽  
Reaction Cross Section ◽  
Level Density ◽  
Reaction Cross ◽  
Measured Cross Section ◽  
Model Calculations ◽  
The Cross ◽  
Equilibrium Emission

Abstract The cross sections of the 121Sb(n,2n) 120Sbm and 123Sb(n,2n) 122Sb reactions were measured at 12.50, 15.79 and 18.87 MeV neutron energies relative to the standard 27Al(n,α) 24Na monitor reaction using neutron activation and offline γ-ray spectrometry technique. Irradiations of the samples were performed at the BARC-TIFR Pelletron Linac Facility, Mumbai, India. The quasi-monoenergetic neutron was generated via the 7Li(p,n) reaction. Statistical model calculations were performed by nuclear reaction codes TALYS (ver. 1.9) and EMPIRE (ver. 3.2.2) using various input parameters and nuclear level density models. The cross sections of the ground and the isomeric state as well as the isomeric cross section ratio were studied theoretically from reaction threshold to 26 MeV energies. The effect of pre-equilibrium emission is also discussed in detail using different theoretical models. The present measured cross section were discussed and compared with reported experimental data and evaluation data of the JEFF-3.3, ENDF/B-VIII.0, JENDL/AD-2017 and TENDL-2019 libraries. A detailed analysis of the uncertainties in the measured cross section data was performed using the covariance analysis method. Furthermore, a systematic study of the (n,2n) reaction cross section for 121Sb and 123Sb isotopes were also performed within 14-15 MeV neutron energies using various systematic formulae. This work helps to overcome discrepancies in Sb data and illustrate a better understanding of pre-equilibrium emission in (n,2n) reaction channel.

scholarly journals Proton-capture Reaction Cross Sections on the Sr Isotopes Relevant to the p-process Nucleosynthesis

2020 ◽  
Vol 13 ◽  
pp. 153
Author(s):  
S. Galanopoulos ◽  
S. Harissopulos ◽  
J. W. Hammer ◽  
R. Kunz ◽  
P. Demetriou
Keyword(s):  
Cross Sections ◽  
Reaction Cross ◽  
Tandem Accelerator ◽  
Proton Capture ◽  
Model Calculations ◽  
Capture Reaction ◽  
Level Densities ◽  
Theoretical Predictions ◽  
The University ◽  
Reaction Cross Sections

Proton-capture reaction cross sections on the 86,87,88Sr isotopes have been determined at energies from 1.4 to 5 MeV by measuring γ-angular distributions at the 4 MV single-ended Dynamitron accelerator of the University of Stuttgart as well as at the 5 MV VdG Tandem accelerator of NCSR "Demokritos", Athens. In the former case an array of 4 HPGe detectors with relative efficiency εr≈100%, each shielded with BGO crystals, were used. In the case of the measurements carried out at "Demokritos" we used only one HPGe detector (εr≈80%) with no BGO shield. Cross sections ranging from 0.5 μb to 5 mb as well as the relevant S factors were obtained. The data were compared with statistical model calculations using the code MOST. In the calculations, various combinations of microscopic and phe- nomenological models of the nucleon-Nucleus Optical Model Potentials (OMP) and Nuclear Level Densities (NLD) were used and a good agreement between the data and theoretical predictions was found.

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