scholarly journals Discovery of collective states in 208Pb by complete spectroscopy

2019 ◽  
Vol 223 ◽  
pp. 01023 ◽  
Author(s):  
Andreas Heusler
Keyword(s):  
Shell Model ◽  
Bound States ◽  
Collective Excitations ◽  
Proton Scattering ◽  
Model Calculations ◽  
Sum Rule ◽  
Transformation Matrices ◽  
Precise Data ◽  
Isobaric Analog ◽  
Inelastic Proton Scattering

Most neutron and proton bound states in 208Pb are described in the shell model as one-particle onehole configurations. Besides precise data obtained with the Q3D magnetic spectrograph of the MLL (Garching, Germany) an important reaction is the inelastic proton scattering via isobaric analog resonances in 209Bi. It yields amplitudes of neutron one-particle one-hole configurations with relative signs in each stateof 208Pb. The orthogonality, normality, and sum rule relations allow to investigate the completeness of the transformation matrices of one-particle one-hole configurations describing the states in 208Pb with spins from 0− to 14− and 0+ to 12+. By this method amplitudes of unobservable one-particle one-hole configurations can be determined.The comparison of spin, parity, and dominant particle-hole components thus derived in up to 30 states of a certain spin to shell model calculations allows to identify states described as collective excitations of the entire nucleus.

A Comparison of Spectroscopic Models of Low Excitation 2+ States in 24Mg and 28Si from Inelastic Proton Scattering

1980 ◽  
Vol 33 (3) ◽  
pp. 495 ◽  
Author(s):  
K Amos ◽  
P Nesci ◽  
I Morrison
Keyword(s):  
Inelastic Scattering ◽  
Shell Model ◽  
Proton Scattering ◽  
Distorted Wave ◽  
Potential Models ◽  
Wave Approximation ◽  
Transition Mechanism ◽  
Transition Densities ◽  
Inelastic Proton Scattering ◽  
Mev Protons

Distorted wave approximation analyses of the inelastic scattering of 49�5 MeV protons from 24Mg and 28Si are used to compare 2 + transition densities that were obtained from a standard shell model, deformed potential models and an SU(3) model of the low excitation spectroscopy of these nuclei. Analysing power predictions do not reproduce the data adequately, and the discrepancies indicate a deficiency in the prescription for the transition mechanism.

Inelastic Proton Scattering fromMo96Through Isobaric Analog Resonances

1973 ◽  
Vol 7 (1) ◽  
pp. 388-394 ◽  
Author(s):  
J. J. Kent ◽  
W. R. Coker ◽  
C. Fred Moore
Keyword(s):  
Proton Scattering ◽  
Isobaric Analog ◽  
Inelastic Proton Scattering

Inelastic proton scattering from 42Ca and 44Ca and analysis in terms of shell-model form factors

1968 ◽  
Vol 116 (3) ◽  
pp. 580-608 ◽  
Author(s):  
J.C. Bane ◽  
J.J. Kraushaar ◽  
B.W. Ridley ◽  
M.M. Stautberg
Keyword(s):  
Shell Model ◽  
Form Factors ◽  
Proton Scattering ◽  
Model Form ◽  
Inelastic Proton Scattering

Multi-ħω shell model analyses of elastic and inelastic proton scattering fromN14andO16

1996 ◽  
Vol 53 (2) ◽  
pp. 838-844 ◽  
Author(s):  
S. Karataglidis ◽  
P. J. Dortmans ◽  
K. Amos ◽  
R. de Swiniarski
Keyword(s):  
Shell Model ◽  
Proton Scattering ◽  
Inelastic Proton Scattering

scholarly journals High-resolution radioactive beam study of the $$^{26}\hbox {Al}(d,p$$) reaction and measurements of single-particle spectroscopic factors

2020 ◽  
Vol 56 (1) ◽  
Author(s):  
G. Lotay ◽  
P. J. Woods ◽  
M. Moukaddam ◽  
M. Aliotta ◽  
G. Christian ◽  
...  
Keyword(s):  
Shell Model ◽  
Transfer Reaction ◽  
Detailed Comparison ◽  
Inverse Kinematic ◽  
Radioactive Beam ◽  
Model Calculations ◽  
Spectroscopic Factors ◽  
Reaction Data ◽  
Isobaric Analog ◽  
High Level

AbstractWe present a detailed comparison of shell model calculations with inverse kinematic transfer reaction data, obtained using a radioactive beam. Experimentally extracted spectroscopic factors from the $$^{26}\hbox {Al}(d,p)^{27}\hbox {Al}$$26Al(d,p)27Al reaction for both even and odd parity states are found to be exceptionally well reproduced by the shell model and a high level of consistency is observed between bound isobaric analog states in $$^{27}\hbox {Al}$$27Al and $$^{27}\hbox {Si}$$27Si, populated via (d, p) and (d, n) transfer, respectively. Furthermore, an evaluation of key resonances in the astrophysical $$^{26}\hbox {Al}(p,\gamma )^{27}\hbox {Si}$$26Al(p,γ)27Si reaction indicates that shell model calculations provide relatively accurate predictions for the existence of strong resonances and mirror nucleus comparisons appear to hold exceptionally well for proton-unbound levels. Consequently, we expect that the utilization of both techniques will likely be a very effective tool in the investigation of stellar processes outside the current reach of experiment.

Grid Lifetime Measurements and Shell Model Calculations In 59Ni

1991 ◽  
Author(s):  
S. Ulbig ◽  
K. P. Lieb ◽  
H. G. Börner ◽  
S. J. Robinson ◽  
J. G. L. Booten
Keyword(s):  
Shell Model ◽  
Lifetime Measurements ◽  
Model Calculations

Low-lying Negative-parity Levels of 17N and 18N

1984 ◽  
Vol 37 (1) ◽  
pp. 17 ◽  
Author(s):  
FC Barker
Keyword(s):  
Shell Model ◽  
Weak Coupling ◽  
Coupling Model ◽  
Negative Parity ◽  
Positive Parity ◽  
Model Calculations

On the basis of a weak-coupling model, adjustments are made to the interactions used in the full shell model calculations of Millener in order to fit the experimental energies of the low-lying negativeparity levels of 16N and of the low-lying positive-parity levels of 180 and 190 . The predicted energies of the low-lying negative-parity levels of 17N then agree better with experiment, while those for 18N lead to suggested spin assignments for the observed levels.

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