A microscopic particle-vibration coupling model applied to single-particle states and giant resonances

2012 ◽  
Author(s):  
G. Colò ◽  
P. F. Bortignon ◽  
M. Brenna ◽  
L. Cao ◽  
K. Mizuyama ◽  
...  
Keyword(s):  
Single Particle ◽  
Coupling Model ◽  
Giant Resonances ◽  
Microscopic Particle ◽  
Vibration Coupling

scholarly journals Evolution of nuclear spin-orbit splittings with Skyrme functional SAMi-T

2019 ◽  
Vol 223 ◽  
pp. 01059
Author(s):  
Shihang Shen ◽  
Gianluca Colò ◽  
Xavier Roca-Maza
Keyword(s):  
Single Particle ◽  
Good Description ◽  
Mean Field ◽  
Tensor Force ◽  
Particle Energy ◽  
Single Particle Energy ◽  
Giant Resonances ◽  
Hartree Fock ◽  
Nuclear Ground State ◽  
Vibration Coupling

A new Skyrme functional has been developed with tensor term guided by ab initio relativistic Brueckner-Hartree-Fock (RBHF) studies on neutron-proton drops. Instead of extracting information on the tensor force from experimental single-particle energy splittings, the RBHF calculations do not contain beyond mean-field effects such as particle-vibration coupling and therefore the information on the tensor force can be obtained without ambiguities. The new functional gives a good description of nuclear ground-state properties aswell as various giant resonances. The description for the evolution of single-particle energy splittings is also improved by the new functional.

A new torsional vibration coupling model for transmission system in diesel generator

2021 ◽  
pp. 146808742110689
Author(s):  
Bin Chen ◽  
Yunbo Hu ◽  
Yibin Guo ◽  
Zhijun Shuai ◽  
Chongpei Liu ◽  
...  
Keyword(s):  
Fault Diagnosis ◽  
Torsional Vibration ◽  
Coupling Model ◽  
Transmission System ◽  
System Matrix ◽  
Diesel Generator ◽  
Lumped Mass ◽  
Proposed Model ◽  
Torsional Coupling ◽  
Vibration Coupling

The coupling between the crankshaft and the camshaft is neglected before in fault diagnosis which may lead to incomplete fault information. In this paper, a new torsional coupling model of a diesel generator transmission system is proposed for fault diagnosis. The natural frequency and forced torsional vibration response of the model are obtained by the system matrix method and Newmark-β method. For the system without considering the lumped mass of camshafts, some key natural frequencies are lost. The vibration dynamics are compared for the transmission system with and without the new coupling model. And important frequency responses are missed in the spectrums of the forced torsional vibration without the new coupling model. Finally, the new coupling model is implemented in fault diagnosis and the cause of an unusual vibration fault is deduced in the simulation, which confirms the feasibility of the proposed model in fault diagnosis.

On the perturbation approach to the particle-vibration coupling model

1973 ◽  
Vol 78 (2) ◽  
pp. 467-495 ◽  
Author(s):  
G Vanden Berghe ◽  
M Waroquier ◽  
K Heyde
Keyword(s):  
Coupling Model ◽  
Perturbation Approach ◽  
Vibration Coupling

The 59Co (d, 3He)58Fe reaction and 58Fe levels in the particle-vibration coupling model

1982 ◽  
Vol 377 (1) ◽  
pp. 148-162 ◽  
Author(s):  
M. Niwano ◽  
T. Ishimatsu ◽  
R. Asano ◽  
T. Suehiro ◽  
M. Tanaka
Keyword(s):  
Coupling Model ◽  
Vibration Coupling

CALCULATION OF GIANT RESONANCE WIDTHS FROM DAMPED SINGLE PARTICLE MOTION

1992 ◽  
Vol 01 (04) ◽  
pp. 833-844 ◽  
Author(s):  
YING-CAI WANG ◽  
F. E. SERR ◽  
E. J. MONIZ ◽  
N. TERUYA ◽  
H. DIAS ◽  
...  
Keyword(s):  
Single Particle ◽  
Particle Motion ◽  
Qualitative Agreement ◽  
Optical Potential ◽  
Giant Resonance ◽  
Low Energy ◽  
Hole State ◽  
Giant Resonances ◽  
Vertex Corrections ◽  
Quadrupole Resonance

The spreading and escape widths of giant resonances are evaluated by considering damped particle and hole propagation in the nucleus. The magnitude and averaged A-dependence of the isoscalar quadrupole resonance widths are reproduced qualitatively when the nucleon optical potential, fit globally to low-energy scattering, is used to damp nucleon motion. Contributions from hole state widths and from vertex corrections increase and decrease the giant resonance widths, respectively. Qualitative agreement with experimental widths is shown for 16 O , 40 Ca and 208 Pb . Comparison with recent calculations within continuum RPA is made.

Single-particle calculation of giant resonances of nonmagic nuclei

1971 ◽  
Vol 14 (5) ◽  
pp. 691-693
Author(s):  
A. A. Bazhenov ◽  
P. A. Cherdantsev
Keyword(s):  
Single Particle ◽  
Giant Resonances
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