Level densities of iron isotopes and low-energy enhancement of γ-strength function

2006 ◽  
Author(s):  
A. V. Voinov
Keyword(s):  
Strength Function ◽  
Low Energy ◽  
Iron Isotopes ◽  
Level Densities

Systematic Low-Energy Enhancement of the Gamma-Ray Strength Function

2019 ◽  
pp. 405-407
Author(s):  
J. E. Midtbø ◽  
A. C. Larsen ◽  
T. Renstrøm ◽  
F. L. Bello Garrote ◽  
E. Lima
Keyword(s):  
Gamma Ray ◽  
Strength Function ◽  
Low Energy

scholarly journals Determination of the nuclear level densities and radiative strength function for 43 nuclei in the mass interval 28≤A≤200

2018 ◽  
Vol 169 ◽  
pp. 00007
Author(s):  
David Knezevic ◽  
Nikola Jovancevic ◽  
Anatoly M. Sukhovoj ◽  
Ludmila V. Mitsyna ◽  
Miodrag Krmar ◽  
...  
Keyword(s):  
Nuclear Physics ◽  
Good Description ◽  
Strength Function ◽  
Mass Region ◽  
Nuclear Level ◽  
Characteristic Structure ◽  
Level Densities ◽  
Practical Model ◽  
Strength Functions

The determination of nuclear level densities and radiative strength functions is one of the most important tasks in low-energy nuclear physics. Accurate experimental values of these parameters are critical for the study of the fundamental properties of nuclear structure. The step-like structure in the dependence of the level densities p on the excitation energy of nuclei Eex is observed in the two-step gamma cascade measurements for nuclei in the 28 ≤ A ≤ 200 mass region. This characteristic structure can be explained only if a co-existence of quasi-particles and phonons, as well as their interaction in a nucleus, are taken into account in the process of gamma-decay. Here we present a new improvement to the Dubna practical model for the determination of nuclear level densities and radiative strength functions. The new practical model guarantees a good description of the available intensities of the two step gamma cascades, comparable to the experimental data accuracy.

scholarly journals Microscopic description of the pygmy dipole resonance in neutron-rich Ca isotopes

2018 ◽  
Vol 194 ◽  
pp. 04002
Author(s):  
N.N. Arsenyev ◽  
A.P. Severyukhin ◽  
V.V. Voronov ◽  
N.V. Giai
Keyword(s):  
Electric Dipole ◽  
Random Phase Approximation ◽  
Strength Function ◽  
Random Phase ◽  
Strength Distribution ◽  
Low Energy ◽  
Dipole Strength ◽  
Quasiparticle Random Phase Approximation ◽  
Dipole Resonance ◽  
Dipole Response

We study the effects of the phonon-phonon coupling on the low-energy electric dipole response within a microscopic model based on an effective Skyrme interaction. The finite rank separable approach for the quasiparticle random phase approximation is used. Choosing as an example the isotopic chain of Calcium, we show the ability of the method to describe the low-energy E1 strength distribution. With one and the same set of parameters we describe available experimental data for 48Ca and predict the electric dipole strength function for 50Ca.

Studies of the gamma-strength function and low energy levels in 65Ga using the (p, γ) average resonance method

1987 ◽  
Vol 475 (2) ◽  
pp. 207-218 ◽  
Author(s):  
K. Nilson ◽  
L. Spanier ◽  
B. Erlandsson ◽  
K. Vierinen ◽  
K. Eskola ◽  
...  
Keyword(s):  
Energy Levels ◽  
Strength Function ◽  
Resonance Method ◽  
Low Energy ◽  
Average Resonance

scholarly journals Is there a low-energy enhancement in the photon strength function in molybdenum?

2008 ◽  
Author(s):  
S. A. Sheets ◽  
Jutta Escher ◽  
Frank S. Dietrich ◽  
Toshihiko Kawano ◽  
Ian J. Thompson
Keyword(s):  
Strength Function ◽  
Low Energy ◽  
Photon Strength Function

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.

scholarly journals Examination of the low-energy enhancement of the γ -ray strength function of Fe56

2018 ◽  
Vol 97 (2) ◽  
Author(s):  
M. D. Jones ◽  
A. O. Macchiavelli ◽  
M. Wiedeking ◽  
L. A. Bernstein ◽  
H. L. Crawford ◽  
...  
Keyword(s):  
Strength Function ◽  
Low Energy ◽  
Γ Ray
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