scholarly journals Nuclear Level Densities in Intermediate and Heavy Nuclei

1967 ◽  
Vol 20 (5) ◽  
pp. 477 ◽  
Author(s):  
JL Cook ◽  
H Ferguson ◽  
AR de L Musgrove
Keyword(s):  
Cross Section ◽  
Anomalous Behaviour ◽  
Incident Neutron ◽  
Heavy Nuclei ◽  
Nuclear Level ◽  
Free Gas ◽  
Level Densities

The level densities of intermediate and heavy nuclei have been fitted to the free gas model formula with some improvement over previous fits. The predictions of tho model regarding cross section behaviour have been tested and found to lead to anomalous behaviour of the partial widths for incident neutron energies above 1�5 MeV.

scholarly journals Proton capture reactions in medium-heavy nuclei relevant to p-process nucleosynthesis

2019 ◽  
Vol 22 ◽  
pp. 98
Author(s):  
V. Foteinou ◽  
M. Axiotis ◽  
A. Lagoyannis ◽  
P. Demetriou ◽  
H.-W. Becker ◽  
...  
Keyword(s):  
Cross Section ◽  
Strength Function ◽  
Model Potential ◽  
Heavy Nuclei ◽  
Proton Capture ◽  
Level Densities ◽  
Section Data ◽  
Microscopic Models ◽  
Optical Model Potential ◽  
Molybdenum Isotopes

Cross-section measurements of proton-capture reactions on Molybdenum isotopes have been performed at beam energies from 2.0 to 6.2 MeV. The cross-section data obtained in this work are compared with those predicted by theory. The latter were calculated using the latest version of the TALYS Hauser-Feshbach (HF) theory code [1] (version 1.6). In these calculations, various phenomenological and (semi)microscopic models were used for the nucleon-nucleus and the α-particle-nucleus optical model potential, the nuclear level densities and the γ-ray strength function.

Nuclear-level densities from cross-section fluctuations

1967 ◽  
Vol 51 (1) ◽  
pp. 100-113 ◽  
Author(s):  
E. Gadioli ◽  
I. Iori
Keyword(s):  
Cross Section ◽  
Nuclear Level ◽  
Level Densities

scholarly journals Installation of NEOPTOLEMOS, the new sum spectrometer for cross section measurements of capture reactions at the ΤANDEM Accelerator Laboratory of NCSR “Demokritos”

2019 ◽  
Vol 24 ◽  
pp. 134
Author(s):  
V. Lagaki ◽  
V. Michalopoulou-Petropoulou ◽  
M. Axiotis ◽  
V. Foteinou ◽  
A. Lagoyannis ◽  
...  
Keyword(s):  
Cross Section ◽  
Large Volume ◽  
Solid Angle ◽  
Nuclear Astrophysics ◽  
Nuclear Level ◽  
Level Densities ◽  
Γ Rays ◽  
Integrated Cross Section ◽  
The University

Cross-section measurements of capture reactions are of key importance in understanding the contribution of the uncertainties of nuclear properties, such as the nucleon-nucleus potential and the nuclear level densities, entering in astrophysics abundance calculations. During the recent years, the Nuclear Astrophysics group of NCSR “Demokritos” has been conducting angle-integrated cross-section measurements using a large-volume NaI(Tl) detector installed at the Dynamitron Tandem Laboratory of the University of Bochum in Germany. Thanks to LIBRA funds a brand new cylindrically shaped NaI(Tl) detector, coined NEOPTOLEMOS, was acquired that is axially segmented in two, covering a solid angle of almost 4π for γ rays emitted at its center.

On the Cross Section of Heavy Nuclei for Slow Neutrons

1935 ◽  
Vol 48 (4) ◽  
pp. 367-372 ◽  
Author(s):  
J. H. van Vleck
Keyword(s):  
Cross Section ◽  
Heavy Nuclei ◽  
The Cross ◽  
Slow Neutrons

scholarly journals Microscopic calculation of symmetry projected nuclear level densities

2009 ◽  
Vol 79 (2) ◽  
Author(s):  
K. Van Houcke ◽  
S. M. A. Rombouts ◽  
K. Heyde ◽  
Y. Alhassid
Keyword(s):  
Nuclear Level ◽  
Level Densities ◽  
Microscopic Calculation

scholarly journals Level studies of 73As via 73Ge(p, nγ)73As reaction and density of discrete levels in 73As

2009 ◽  
Vol 24 (2) ◽  
pp. 82-85 ◽  
Author(s):  
Aziz Behkami ◽  
Rohallah Razavi ◽  
Tayeb Kakavand
Keyword(s):  
Proton Beam ◽  
Excited States ◽  
Level Scheme ◽  
Level Density ◽  
Fermi Gas ◽  
Temperature Model ◽  
Nuclear Level Density ◽  
Nuclear Level ◽  
Level Densities ◽  
Experimental Level

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.

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