scholarly journals THE ELECTRIC-DIPOLE GAMMA-RAY STRENGTH FUNCTION FOR HEAVY EVEN-EVEN NUCLEI

1962 ◽  
Author(s):  
R.T. Carpenter
Keyword(s):  
Electric Dipole ◽  
Gamma Ray ◽  
Strength Function

scholarly journals Determination of the electric dipole (E1) gamma ray strength function of 56Mn from the Bn level to low levels by two-step gamma cascades

2016 ◽  
Vol 19 (1) ◽  
pp. 83-93
Author(s):  
Son An Nguyen
Keyword(s):  
Cross Section ◽  
Electric Dipole ◽  
Nuclear Reactor ◽  
Gamma Ray ◽  
Transition Probabilities ◽  
Strength Function ◽  
Spin Parity ◽  
Coincidence System ◽  
Low Levels

Investigation of gamma ray strength function is necessary to determine some nuclear characteristics, such as: spin, parity, electromagnetic transitions, cross section, … In this research, 55Mn target was activated on the neutron of 3rd horizontal channel of Dalat nuclear reactor. The experimental data was collected by event-event coincidence by gammagamma coincidence system. The 56Mn deexcitation afforded the collected of 49 gamma – gamma twostep cascades. This was applied on shell model to determine the spin, parity, electric dipole gamma strength function (E1) as well as comparing between the theoretical and experimental E1 transition probabilities

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 Systematics of the electric dipole response in stable tin isotopes

2018 ◽  
Vol 178 ◽  
pp. 03008 ◽  
Author(s):  
Sergej Bassauer ◽  
Peter von Neumann-Cosel ◽  
Atsushi Tamii
Keyword(s):  
Electric Dipole ◽  
Strength Function ◽  
Research Centre ◽  
Underlying Structure ◽  
Skin Thickness ◽  
Neutron Skin ◽  
Proton Scattering ◽  
Heavy Nuclei ◽  
Scattering Experiment ◽  
Dipole Response

The electric dipole is an important property of heavy nuclei. Precise information on the electric dipole response provides information on the electric dipole polarisability which in turn allows to extract important constraints on neutron-skin thickness in heavy nuclei and parameters of the symmetry energy. The tin isotope chain is particularly suited for a systematic study of the dependence of the electric dipole response on neutron excess as it provides a wide mass range of accessible isotopes with little change of the underlying structure. Recently an inelastic proton scattering experiment under forward angles including 0º on 112,116,124Sn was performed at the Research Centre for Nuclear Physics (RCNP), Japan with a focus on the low-energy dipole strength and the polarisability. First results are presented here. Using data from an earlier proton scattering experiment on 120Sn the gamma strength function and level density are determined for this nucleus.

scholarly journals How do we infer shell effects at high-excitation energies? A new spectroscopic probe to search for magic numbers

2019 ◽  
Vol 223 ◽  
pp. 01045 ◽  
Author(s):  
Cebo Ngwetsheni ◽  
José Nicolás Orce
Keyword(s):  
Gamma Ray ◽  
Strength Function ◽  
Dipole Polarizability ◽  
Magic Numbers ◽  
Data Sets ◽  
High Excitation ◽  
Excitation Energies ◽  
Long Range Correlations ◽  
Shell Effects ◽  
Spectroscopic Probe

The nuclear dipole polarizability is mainly governed by the dynamics of the giant dipole resonance and, assuming validity of the brink-Axel hypothesis, has been investigated along with the effects of the low-energy enhancement of the photon strength function for nuclides in medium- and heavy-mass nuclei. Cubic-polynomial fitsto both data sets extrapolated down to a gamma-ray energy of 0.1 MeV show a significantreduction of the nuclear dipole polarizability for semi-magic nuclei, with magic numbers N =28, 50 and 82, which supports shell effects at high-excitation energies in the the quasi-continuum region. This work assigns σ-2 values as sensitive measures of long-range correlations of the nuclear force and provides a new spectroscopic probe to search for “old” and “new” magic numbers at high-excitation energies.

scholarly journals Combined study of the gamma-ray strength function of114Cd with (n,γ) and (γ,γ’) reactions

2015 ◽  
Vol 93 ◽  
pp. 01012 ◽  
Author(s):  
T. Belgya ◽  
R. Massarzyk ◽  
L. Szentmiklósi ◽  
G. Schramm ◽  
R. Schwengner ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Strength Function

Gamma-ray strength function of 198Hg

1985 ◽  
Vol 441 (3) ◽  
pp. 397-409 ◽  
Author(s):  
D.S. Armstrong ◽  
S.K. Saha ◽  
C.-W. Cheng ◽  
E. Adamides ◽  
A. Henrikson ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Strength Function

Proposal on Gamma-Ray Strength Function for Calculation of Gamma-Ray Production Cross Sections

1980 ◽  
Vol 17 (4) ◽  
pp. 312-314 ◽  
Author(s):  
Tsuguyuki KOBAYASHP ◽  
Hideo KITAZAWA ◽  
Nobuhiro YAMAMURO
Keyword(s):  
Cross Sections ◽  
Gamma Ray ◽  
Production Cross ◽  
Strength Function

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.

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