scholarly journals Study of the 191Ir(n,2n)190Ir cross section

2020 ◽  
Vol 15 ◽  
pp. 97
Author(s):  
N. Patronis ◽  
C. T. Papadopoulos ◽  
S. Galanopoulos ◽  
M. Kokkoris ◽  
G. Perdikakis ◽  
...  
Keyword(s):  
Cross Section ◽  
Isomeric State ◽  
Reaction Cross Section ◽  
Hpge Detector ◽  
Theoretical Calculations ◽  
Level Density ◽  
Reaction Cross ◽  
Activation Technique ◽  
Spin Dependence ◽  
State 1

The 191Ir(n,2n)190Ir cross section was measured by using of the activation technique at four neutron energies in the range 10.0-11.3 MeV. The quasimonoenergetic neutron beam was produced via the 2H(d,n)3He reaction at the 5.5 MV Tandem Van de Graaff accelerator of NCSR ”Demokritos”. After the irradiations the induced activity of the samples was measured through a 56% relative efficiency HPGe detector. The cross section for the population of the second high spin (11−) isomeric state was measured along with the sum of the reaction cross section populating both the ground (4−) and the first isomeric state (1−). The experimental data will be combared to theoretical calculations in order to deduce information for the spin dependence of the level density parameters.

scholarly journals Study of the 193Ir(n,2n)192Ir Reaction Cross Section

2019 ◽  
Vol 24 ◽  
pp. 29
Author(s):  
N. Patronis ◽  
A. Kalamara ◽  
S. Harissopulos ◽  
M. Kokkoris ◽  
A. Lagoyannis ◽  
...  
Keyword(s):  
Cross Section ◽  
Neutron Beam ◽  
Ground State ◽  
Reaction Cross Section ◽  
Hpge Detector ◽  
Deuteron Beam ◽  
Reaction Cross ◽  
Total Reaction Cross Section ◽  
Activation Technique ◽  
State 1

The 193Ir(n,2n)192Ir reaction cross section was measured relative to the 27Al(n,a)24Na and 197Au(n,2n)196Au reactions by means of the activation technique at two neutron beam energies: 10.0 and 10.5 MeV. The neutron beam was produced via the 2H(d,n)3Ηe reaction. The deuteron beam was provided by the 5.5 MV Tandem Van de Graaff accelerator of the N.C.S.R. “Demokritos”. After the irradiations the induced activity of the samples was measured through a 56% relative efficiency HPGe detector. The total reaction cross section for the population of the ground state (4+) and the first isomeric state (1-) was determined. The adopted method for the correction concerning the population of the product nucleus 192Ir through the 191Ir(n,γ)192Ir reaction is also presented.

scholarly journals Experimental study of the 197Au(n,2n) reaction cross section

2019 ◽  
Vol 17 ◽  
pp. 9
Author(s):  
A. Tsinganis ◽  
M. Kokkoris ◽  
A. Lagoyannis ◽  
E. Mara ◽  
C. T. Papadopoulos ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Isomeric State ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Activation Technique ◽  
Incident Neutron ◽  
Mcnp Code ◽  
Foil Activation ◽  
24Na Reaction

In the present work, the 197Au(n,2n) reaction cross section is experimentally determined relative to the 27Al(n,α)24Na reaction at incident neutron energies of 9.0 to 10.5 MeV by means of the activation technique. The quasi-monoenergetic fast neutron beam was produced via the 2H(d,n)3He reaction at the 5.5 MV Tandem Van de Graaff accelerator at the NCSR “Demokritos” and was studied to determine the contribution of background “parasitic” neutrons using the multiple foil activation technique and the SULSA unfolding code. The cross sections for the population of the second isomeric state (12−) of 196Au and the sum of the ground (2−) and first isomeric state (5−) population cross sections were independently determined. Auxiliary Monte Carlo simulations were performed with the MCNP code.

scholarly journals Activation cross section of the (n,2n) reaction on Hf isotopes

2019 ◽  
Vol 23 ◽  
pp. 47
Author(s):  
A. Kalamara ◽  
M. Serris ◽  
A. Spiliotis ◽  
D. Sigalos ◽  
N. Patronis ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Reaction Cross Section ◽  
Beam Energy ◽  
Reaction Cross ◽  
Activation Technique ◽  
Incident Neutron ◽  
Activation Cross Section ◽  
Reference Reaction

Cross sections of the 174Hf(n,2n)173Hf and 176Hf(n,2n)175Hf reactions have been experimentally determined relative to the 27Al(n,α)24Na reference reaction at incident neutron energies of 15.3 and 17.1 MeV by means of the activation technique. The irradiations were carried out at the 5 MV tandem T11/25 Accelerator Laboratory of NCSR "Demokritos" with monoenergetic neutron beams provided via the 3H(d,n)4He reaction, using a new Ti-tritiated target of 373 GBq activity. In the determination of the 176Hf(n,2n)175Hf reaction cross section the contamination of the 174Hf(n,γ)175Hf and 177Hf(n,3n)175Hf reactions has been taken into account. Moreover, the neutron beam energy has been studied by means of Monte Carlo simulation codes and the neutron flux has been determined via the 27Al(n,α)24Na reference reaction.

The effect of level density and reaction mechanisms on the reaction cross-section calculations at intermediate energies

1999 ◽  
Vol 112 (7) ◽  
pp. 743-760 ◽  
Author(s):  
V. P. Lunev ◽  
Yu. N. Shubin ◽  
C. Grandi ◽  
B. Poli ◽  
A. Ventura
Keyword(s):  
Cross Section ◽  
Reaction Mechanisms ◽  
Reaction Cross Section ◽  
Level Density ◽  
Reaction Cross ◽  
Intermediate Energies

scholarly journals Theoretical study of the isomeric cross section of the 197Au(n,2n) reaction

2019 ◽  
Vol 18 ◽  
pp. 13
Author(s):  
A. Tsinganis ◽  
M. Diakaki ◽  
M. Kokkoris ◽  
A. Lagoyannis ◽  
C. T. Papadopoulos ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Isomeric State ◽  
Level Scheme ◽  
Reaction Cross Section ◽  
Theoretical Study ◽  
Strong Dependence ◽  
Mass Region ◽  
Reaction Cross ◽  
Theoretical Results

In the present work, the 197Au(n,2n) reaction cross section is studied within the framework of the Gen- eralized Superfluid Model (GSM). The cross sections for the population of the second isomeric state (12−) of 196Au and the sum of the ground (2−) and first isomeric state (5−) population cross sections were independently studied in the 8 to 25 MeV region with the use of the STAPRE-F, EMPIRE and TALYS codes, which were also compared in their implementation of the GSM. The theoretical results are compared with previous work in the same mass region and the strong dependence on the level scheme of the nuclei involved was revealed.

(γ, 2n)-Reaction cross-section calculations of several even-even lanthanide nuclei using different level density models

2015 ◽  
Vol 78 (1) ◽  
pp. 53-64 ◽  
Author(s):  
A. Kaplan ◽  
İ. H. Sarpün ◽  
A. Aydın ◽  
E. Tel ◽  
V. Çapalı ◽  
...  
Keyword(s):  
Cross Section ◽  
Reaction Cross Section ◽  
Level Density ◽  
Reaction Cross ◽  
Level Density Models

scholarly journals Neutron reaction studies in the rare earth region: First results for the 162Er(n,2n)161Er physics case

2019 ◽  
Vol 22 ◽  
pp. 45
Author(s):  
N. Patronis ◽  
X. Aslanoglou ◽  
M. Axiotis ◽  
Z. Eleme ◽  
V. Foteinou ◽  
...  
Keyword(s):  
Rare Earth ◽  
Experimental Method ◽  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Activation Technique ◽  
Reaction Study ◽  
Neutron Reaction ◽  
First Results ◽  
Threshold Energies

In the present work the first experimental results at near two threshold energies for the 162Er(n,2n)161Er reaction study are presented. The reaction cross section was determined at the energies of 11.0 and 11.3 MeV by means of the activation technique. The experimental method and setup is described.

Sign in / Sign up

Export Citation Format

Share Document