scholarly journals Reinterpretation of excited states in Po212 : Shell-model multiplets rather than α -cluster states

2021 ◽  
Vol 104 (5) ◽  
Author(s):  
A. Fernández ◽  
A. Jungclaus ◽  
P. Golubev ◽  
D. Rudolph ◽  
L. G. Sarmiento ◽  
...  
Keyword(s):  
Shell Model ◽  
Excited States ◽  
Cluster States

scholarly journals GDR Contribution to Coulomb Excitation. II. 17O

1982 ◽  
Vol 35 (3) ◽  
pp. 301 ◽  
Author(s):  
FC Barker
Keyword(s):  
Excited State ◽  
Shell Model ◽  
Excited States ◽  
Giant Dipole Resonance ◽  
Coulomb Excitation ◽  
Dipole Resonance ◽  
First Excited State ◽  
Virtual Excitation

The contribution to the Coulomb excitation of the first excited state of 170 due to virtual excitation of the giant dipole resonance (GDR) is calculated, using shell model wavefunctions for the ground and first excited states. A large value is obtained.

Gamma Decay of Excited States inBi210and an Interpretation with the Shell Model

1973 ◽  
Vol 7 (5) ◽  
pp. 2137-2150 ◽  
Author(s):  
D. Proetel ◽  
F. Riess ◽  
E. Grosse ◽  
R. Ley ◽  
M. R. Maier ◽  
...  
Keyword(s):  
Shell Model ◽  
Excited States ◽  
Gamma Decay ◽  
Decay Of Excited States

CLUSTER STATES IN 13C AND 11B

2008 ◽  
Vol 17 (10) ◽  
pp. 2071-2075 ◽  
Author(s):  
T. KAWABATA ◽  
Y. SASAMOTO ◽  
Y. MAEDA ◽  
S. SAKAGUCHI ◽  
Y. SHIMIZU ◽  
...  
Keyword(s):  
Excited States ◽  
Molecular Configuration ◽  
Cluster States

The cluster structures of the excited states in 11 B and 13 C were discussed by measuring the isoscalar monopole strengths in the inelastic α scattering at Eα = 388 MeV . It was found that the [Formula: see text], [Formula: see text], and [Formula: see text] states in 13 C are candidates for the α cluster states with a 3α + n molecular configuration.

Three-center cluster states in 11C and 11B

2006 ◽  
Vol 21 (31n33) ◽  
pp. 2403-2409
Author(s):  
Yoshiko Kanada-En'yo
Keyword(s):  
Experimental Data ◽  
Molecular Dynamics ◽  
Excited States ◽  
Cluster State ◽  
Cluster Structure ◽  
Cluster States ◽  
Spin Parity ◽  
Variational Calculations

Structures of excited states in 11 C and 11 B were studied based on variational calculations after spin-parity projection in a framework of antisymmetrized molecular dynamics (AMD). The calculations systematically reproduce experimental data of the transition strengths such as Gamov-Teller(GT) and M1 transitions. A well-developed cluster structure of 2α+3 He (t) was found in the [Formula: see text] state of 11 C (11 B ). We assigned this state to the observed [Formula: see text] state at 8 MeV. The calculations reproduce the small [Formula: see text] which has been measured in the recent experiments. It was found that the [Formula: see text] state has a dilute cluster state, and its features are similar to those of the [Formula: see text] which is considered to be a gas state of three α clusters.

Details of the structure of bound excitons and bound multiexciton complexes in Si

1977 ◽  
Vol 55 (17) ◽  
pp. 1463-1480 ◽  
Author(s):  
M. L. W. Thewalt
Keyword(s):  
High Resolution ◽  
Shell Model ◽  
Excited States ◽  
Photoluminescence Spectra ◽  
Luminescence Line ◽  
Donor And Acceptor

The high resolution photoluminescence spectra reported here reveal new details of the structure of both bound excitons and bound multiexciton complexes in donor and acceptor doped Si. The bound exciton and bound multiexciton complexes in Si containing P impurities are found to have excited states, as was postulated in a recent shell-model of the bound multiexciton complexes. Several new features of the luminescence due to bound excitons and bound multiexciton complexes in acceptor doped Si are also found to be in agreement with the shell-model. In contrast to previous studies, we find no reason to doubt the original bound multiexciton complex explanation of the luminescence line series which are seen in lightly doped Si. The implications of these results are also discussed in relation to previously reported interpretations of the photoluminescence spectra of donor-doped Ge.

FIRST γ-RAY SPECTROSCOPY AND ISOSPIN SYMMETRY STUDY OF THE N = Z - 2 NUCLEUS 44V

2010 ◽  
Vol 25 (21n23) ◽  
pp. 2028-2029 ◽  
Author(s):  
M. J. TAYLOR ◽  
M. A. BENTLEY ◽  
J. BROWN ◽  
R. WADSWORTH ◽  
P.E. KENT ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Shell Model ◽  
Excited States ◽  
State Of The Art ◽  
Isospin Symmetry ◽  
Charge Symmetry Breaking ◽  
Charge Symmetry ◽  
Model Calculations ◽  
Γ Ray ◽  
First Time

Excited states in the Tz = -1 nucleus 44 V have been observed for the first time. The states have been identified through recoil-γ-γ coincidences and comparison with analogue states in the mirror nucleus 44 Sc . Mirror energy differences have been extracted and compared to state-of-the-art fp shell-model calculations which include charge symmetry breaking forces.

Hartree–Fock and Shell-Model Studies of 56Ni

1973 ◽  
Vol 51 (7) ◽  
pp. 737-742 ◽  
Author(s):  
G. Do Dang ◽  
J. A. Rabbat
Keyword(s):  
Shell Model ◽  
Excited States ◽  
Single Particle ◽  
Critical Discussion ◽  
Hartree Fock ◽  
Model Studies

The structure of the low-lying states of 56Ni is studied in the frameworks of the Hartree–Fock theory and the shell model. Attention is focused on the choice of the single particle energies and the effect of highly excited states. It is found that the low-lying states can reasonably be described by the shell model with 1p–1h and 2p–2h excitations from the 1f7/2 level. A critical discussion of the contradictory results of previous works is made and their connection with the present work is pointed out.

scholarly journals Investigation of E1 Strength in Coulomb Excitation of Light Nuclei

1989 ◽  
Vol 42 (3) ◽  
pp. 233 ◽  
Author(s):  
FC Barke ◽  
CL Woods
Keyword(s):  
Harmonic Oscillator ◽  
Shell Model ◽  
Excited States ◽  
Single Particle ◽  
Coulomb Excitation ◽  
Light Nuclei ◽  
Additional Increase ◽  
Intermediate States ◽  
Experimental Values

Contributions to the predominantly E2 Coulomb excitation of the first excited states of 6U, 7U, lOB, 11 B, 12C and 170 due to virtual E1 transitions through intermediate states are calculated using for all states shell model wavefunctions of the lowest admissible configurations, obtained with a realistic Hamiltonian. When harmonic oscillator single-particle wavefunctions are used, the contributions can be calculated rigorously but are generally less than the experimental values. Increases due to use of Woods-Saxon wavefunctions are estimated in a semi-quantitative way. For 170, the additional increase due to admixtures from higher configurations in the wavefunctions is also considered.

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