scholarly journals Isospin dependence of electromagnetic transition strengths among an isobaric triplet

2019 ◽  
Vol 797 ◽  
pp. 134835
Author(s):  
A. Boso ◽  
S.A. Milne ◽  
M.A. Bentley ◽  
F. Recchia ◽  
S.M. Lenzi ◽  
...  
Keyword(s):  
Electromagnetic Transition ◽  
Isospin Dependence

Energy Levels and Electromagnetic Transition of 90-94mo Nuclei Using Ibm-1

2020 ◽  
pp. 149-152
Keyword(s):  
Experimental Data ◽  
Transition Probability ◽  
Energy Levels ◽  
Dynamical Symmetry ◽  
Interacting Boson Model ◽  
Excitation Energies ◽  
Electromagnetic Transition ◽  
Boson Model ◽  
Energy States ◽  
Good Agreement

The energy states for the J , b , ɤ bands and electromagnetic transitions B (E2) values for even – even molybdenum 90 – 94 Mo nuclei are calculated in the present work of "the interacting boson model (IBM-1)" . The parameters of the equation of IBM-1 Hamiltonian are determined which yield the best excellent suit the experimental energy states . The positive parity of energy states are obtained by using IBS1. for program for even 90 – 94 Mo isotopes with bosons number 5 , 4 and 5 respectively. The" reduced transition probability B(E2)" of these neuclei are calculated and compared with the experimental data . The ratio of the excitation energies of the 41+ to 21+ states ( R4/2) are also calculated . The calculated and experimental (R4/2) values showed that the 90 – 94 Mo nuclei have the vibrational dynamical symmetry U(5). Good agreement was found from comparison between the calculated energy states and electric quadruple probabilities B(E2) transition of the 90–94Mo isotopes with the experimental data .

Proton band crossings and electromagnetic transition probabilities in 161Lu

1988 ◽  
Vol 489 (3) ◽  
pp. 477-507 ◽  
Author(s):  
C.-H. Yu ◽  
M.A. Riley ◽  
J.D. Garrett ◽  
G.B. Hagemann ◽  
J. Simpson ◽  
...  
Keyword(s):  
Transition Probabilities ◽  
Electromagnetic Transition

Electromagnetic transition intensities in deformed nuclei

1965 ◽  
Vol 65 (4) ◽  
pp. 686-694 ◽  
Author(s):  
Yu.T. Grin ◽  
I.M. Pavlichenkov
Keyword(s):  
Deformed Nuclei ◽  
Electromagnetic Transition

scholarly journals Electromagnetic transition form factors of baryons in a relativistic Faddeev approach

2018 ◽  
Vol 181 ◽  
pp. 01013 ◽  
Author(s):  
Reinhard Alkofer ◽  
Christian S. Fischer ◽  
Hèlios Sanchis-Alepuz
Keyword(s):  
Ground State ◽  
Bound States ◽  
Body Wave ◽  
Form Factors ◽  
Wave Functions ◽  
Electromagnetic Form Factors ◽  
Transition Form ◽  
Electromagnetic Transition ◽  
Three Body ◽  
Gluon Interaction

The covariant Faddeev approach which describes baryons as relativistic three-quark bound states and is based on the Dyson-Schwinger and Bethe-Salpeter equations of QCD is briefly reviewed. All elements, including especially the baryons’ three-body-wave-functions, the quark propagators and the dressed quark-photon vertex, are calculated from a well-established approximation for the quark-gluon interaction. Selected previous results of this approach for the spectrum and elastic electromagnetic form factors of ground-state baryons and resonances are reported. The main focus of this talk is a presentation and discussion of results from a recent investigation of the electromagnetic transition form factors between ground-state octet and decuplet baryons as well as the octet-only Σ0 to Λ transition.

scholarly journals YN CORRELATIONS FROM THE STOPPED K− REACTION ON 4He

2008 ◽  
Vol 23 (27n30) ◽  
pp. 2520-2523 ◽  
Author(s):  
T. SUZUKI ◽  
M. IIO ◽  
K. ITAHASHI ◽  
M. IWASAKI ◽  
Y. MATSUDA ◽  
...  
Keyword(s):  
Invariant Mass ◽  
Mass Spectra ◽  
Absorption Process ◽  
Isospin Dependence ◽  
First Time ◽  
Invariant Mass Spectra

We have investigated non-mesonic reactions of the stopped K− on 4 He in terms of correlations of coincident ΛN pairs. As the result, Λp and Λn branches of the two-nucleon absorption process were clearly observed in the ΛN invariant mass spectra. The spin-isospin dependence of the process was observed for the first time.

scholarly journals Shell model description of heavy nuclei and abnormal collective motions

2018 ◽  
Vol 178 ◽  
pp. 02015
Author(s):  
Chong Qi
Keyword(s):  
Shell Model ◽  
Degrees Of Freedom ◽  
Large Scale ◽  
Model Description ◽  
Heavy Nuclei ◽  
Collective Models ◽  
Collective Behaviors ◽  
Electromagnetic Transition ◽  
Nuclear Shell ◽  
Model Approach

In this contribution I present systematic calculations on the spectroscopy and electromagnetic transition properties of intermediate-mass and heavy nuclei around 100Sn and 208Pb. We employed the large-scale configuration interaction shell model approach with realistic interactions. Those nuclei are the longest isotopic chains that can be studied by the nuclear shell model. I will show that the yrast spectra of Te isotopes show a vibrational-like equally spaced pattern but the few known E2 transitions show rotational-like behaviour. These kinds of abnormal collective behaviors cannot be reproduced by standard collective models and provide excellent background to study the competition of single-particle and various collective degrees of freedom. Moreover, the calculated B(E2) values for neutron-deficient and heavier Te isotopes show contrasting different behaviours along the yrast line, which may be related to the enhanced neutron-proton correlation when approaching N=50. The deviations between theory and experiment concerning the energies and E2 transition properties of low-lying 0+ and 2+ excited states and isomeric states in those nuclei may provide a constraint on our understanding of nuclear deformation and intruder configuration in that region.

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