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.

Using a double folding potential for the derivation of the spectroscopic factors of the (3He, d) transfer reaction

2016 ◽  
Vol 25 (09) ◽  
pp. 1650061 ◽  
Author(s):  
R. Pampa Condori ◽  
H. Dias ◽  
J. Lubian
Keyword(s):  
Born Approximation ◽  
Transfer Reaction ◽  
Distorted Wave ◽  
Distorted Wave Born Approximation ◽  
Model Calculations ◽  
Folding Potential ◽  
Spectroscopic Factors ◽  
Double Folding ◽  
Double Folding Potential ◽  
Good Agreement

In this paper, the [Formula: see text] reactions are revisited, with the goal of obtaining spectroscopic factors (SF) for the transition to the ground state of some residual nuclei, applying the distorted wave Born approximation (DWBA). The double-folding São Paulo Potential (SPP) was used to derive the distorted wave function in the entrance and exit channels. The derived SF are compared with the results of extensive shell model calculations showing a rather good agreement.

Spectroscopic factors from one-proton stripping reactions on sd-shell nuclei: experimental measurements and shell-model calculations

1994 ◽  
Vol 571 (1) ◽  
pp. 1-42 ◽  
Author(s):  
J. Vernotte ◽  
G. Berrier-Ronsin ◽  
J. Kalifa ◽  
R. Tamisier ◽  
B.H. Wildenthal
Keyword(s):  
Shell Model ◽  
Experimental Measurements ◽  
Model Calculations ◽  
Spectroscopic Factors

scholarly journals Single-Particle and Collective Structures in Neutron-Rich Sr Isotopes

Universe ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 23
Author(s):  
Kamila Sieja
Keyword(s):  
Shell Model ◽  
Ground State ◽  
Experimental Studies ◽  
Low Energy ◽  
Model Description ◽  
Sr Isotopes ◽  
Model Calculations ◽  
Spectroscopic Factors ◽  
Monte Carlo Shell Model ◽  
Insight Into

Neutron-rich Sr nuclei around N=60 exhibit a sudden shape transition from a spherical ground state to strongly prolate-deformed. Recently, much new insight into the structure of Sr isotopes in this region has been gained through experimental studies of the excited levels, transition strengths, and spectroscopic factors. In this work, a “classic” shell model description of strontium isotopes from N=50 to N=58 is provided, using a natural valence space outside the 78Ni core. Both even–even and even–odd isotopes are addressed. In particular, spectroscopic factors are computed to shed more light on the structure of low-energy excitations and their evolution along the Sr chain. The origin of deformation at N=60 is mentioned in the context of the present and previous shell model and Monte Carlo shell model calculations.

Study of 18O States by the 17O(d,p)18O Reaction

1975 ◽  
Vol 53 (9) ◽  
pp. 882-890 ◽  
Author(s):  
D. Drain ◽  
B. Chambon ◽  
J. L. Vidal ◽  
A. Dauchy ◽  
H. Beaumevieille
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Cross Sections ◽  
Differential Cross ◽  
Ground State ◽  
Differential Cross Sections ◽  
Model Calculations ◽  
Absolute Differential ◽  
Spectroscopic Factors

The 17O(d,p)18O reaction was studied at Ed = 3.6 and 4.0 MeV. Absolute differential cross sections were measured for the ground state and the 1.98, 3.55, 3.63, 3.91, 4.45, 5.09, 5.25, and 5.37 MeV states in 18O. The experimental data are analyzed using the DWBA and Hauser–Feshbach theoreies and spectroscopic factors are deduced. These results are compared to previous data and shell model calculations. The correspondence between the above states and their analogue states in 18F is discussed.

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.

scholarly journals THE DENSITY MATRIX RENORMALIZATION GROUP AND THE NUCLEAR SHELL MODEL

2008 ◽  
Vol 17 (supp01) ◽  
pp. 122-132
Author(s):  
S. PITTEL ◽  
B. THAKUR ◽  
N. SANDULESCU
Keyword(s):  
Renormalization Group ◽  
Density Matrix ◽  
Shell Model ◽  
Large Scale ◽  
Group Method ◽  
Density Matrix Renormalization Group ◽  
Model Calculations ◽  
Density Matrix Renormalization ◽  
High Level ◽  
Level Of Agreement

We summarize recent efforts to develop an angular-momentum-conserving variant of the Density Matrix Renormalization Group method into a practical truncation strategy for large-scale shell model calculations of atomic nuclei. Following a brief description of the key elements of the method, we report the results of test calculations for 48 Cr and 56 Ni . In both cases we consider nucleons limited to the 2p-1f shell and interacting via the KB3 interaction. Both calculations produce a high level of agreement with the exact shell-model results. Furthermore, and most importantly, the fraction of the complete space required to achieve this high level of agreement goes down rapidly as the size of the full space grows.

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
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