Microscopic treatment of some weak processes in the A = 14 nuclei

1980 ◽  
Vol 58 (3) ◽  
pp. 388-400 ◽  
Author(s):  
B. Lorazo ◽  
B. Goulard
Keyword(s):  
Ground State ◽  
Total Spin ◽  
Muon Capture ◽  
Β Decay ◽  
Capture Process ◽  
Hyperfine State

A microscopic treatment of weak processes like the β-decay of 14C (ground state) or 14O (ground state) and the partial muon capture by 14N (ground state) to 14C (ground state) is presented in order to detect the possible importance of the mesonic exchange currents in these unusually inhibited processes. The study shows that this possibility could occur in the muon capture process associated with the total spin [Formula: see text] hyperfine state.

scholarly journals Measurement of the 2+→0+ ground-state transition in the β decay of F20

2019 ◽  
Vol 100 (6) ◽  
Author(s):  
O. S. Kirsebom ◽  
M. Hukkanen ◽  
A. Kankainen ◽  
W. H. Trzaska ◽  
D. F. Strömberg ◽  
...  
Keyword(s):  
Ground State ◽  
State Transition ◽  
Ground State Transition ◽  
Β Decay

scholarly journals Two-phonon structures for beta-decay theory

2018 ◽  
Vol 194 ◽  
pp. 02008
Author(s):  
A.P. Severyukhin ◽  
N.N. Arsenyev ◽  
I.N. Borzov ◽  
R.G. Nazmitdinov ◽  
S. Åberg
Keyword(s):  
Random Matrix ◽  
Single Particle ◽  
Ground State ◽  
Matrix Theory ◽  
Decay Rates ◽  
Total Probability ◽  
Phonon Coupling ◽  
Skyrme Interaction ◽  
Β Decay ◽  
Gamow Teller

The β-decay rates of 60Ca have been studied within a microscopic model, which is based on the Skyrme interaction T45 to construct single-particle and phonon spaces. We observe a redistribution of the Gamow–Teller strength due to the phonon-phonon coupling, considered in the model. For 60Sc, the spin-parity of the ground state is found to be 1+. We predict that the half-life of 60Ca is 0.3 ms, while the total probability of the βxn emission is 6:1%. Additionally, the random matrix theory has been applied to analyze the statistical properties of the 1+ spectrum populated in the β-decay to elucidate the obtained results.

Structures, electronic and magnetic properties of the MnnS and Mnn−1S2 (n = 1–6) clusters

2019 ◽  
Vol 33 (22) ◽  
pp. 1950254 ◽  
Author(s):  
Zhi Li ◽  
Zhen Zhao ◽  
Qi Wang ◽  
Tong-Tong Shi
Keyword(s):  
Magnetic Properties ◽  
Ground State ◽  
First Principles ◽  
Steel Industry ◽  
Population Analysis ◽  
Total Spin ◽  
Spontaneous Generation ◽  
Mulliken Population ◽  
Electronic And Magnetic Properties ◽  
Homo Lumo

To understand sulfide inclusions in the steel industry, the structures, stabilities, electronic and magnetic properties of the Mn[Formula: see text]S and Mn[Formula: see text]S2 (n=1–6) clusters are investigated by using first-principles. The results show that the S atoms prefer to occupy the outside surface center of the Mn[Formula: see text] (n = 3–6) clusters. Chiral isomers are occurred to the Mn5S2 isomers. The Mn2S, Mn2S2 clusters are more stable than their neighbors. However, the MnS, S2, and Mn5I2 clusters possess higher dynamic stability than their neighbors by the HOMO–LUMO gaps. The Mn[Formula: see text]S and Mn[Formula: see text]S2 (n = 1–6) clusters prefer to spontaneous generation by Gibbs free energy. A few 4s orbital electrons of Mn atoms transferred to the S atoms by Mülliken population analysis. For the other Mn[Formula: see text]S (n = 1–6) clusters, the spin density (17.256) of the ground-state Mn6S clusters is the largest. For the Mn[Formula: see text]S2 (n = 1–6) clusters, the total spin (9.604) of the ground-state Mn2S2 cluster is the largest.

scholarly journals Ground-State Proton Decay ofBr69and Implications for theSe68Astrophysical Rapid Proton-Capture Process Waiting Point

2011 ◽  
Vol 106 (25) ◽  
Author(s):  
A. M. Rogers ◽  
M. A. Famiano ◽  
W. G. Lynch ◽  
M. S. Wallace ◽  
F. Amorini ◽  
...  
Keyword(s):  
Ground State ◽  
Proton Decay ◽  
Proton Capture ◽  
Capture Process ◽  
Rapid Proton

The effects of ground state correlations in 16O on the muonuclear sum rule

1982 ◽  
Vol 60 (3) ◽  
pp. 321-328 ◽  
Author(s):  
D. Duplain ◽  
B. Goulard
Keyword(s):  
Wave Function ◽  
Cluster Expansion ◽  
Ground State ◽  
Neutrino Energy ◽  
Tensor Component ◽  
Second Order ◽  
Muon Capture ◽  
Total Rate ◽  
Sum Rule ◽  
The Mean

The total rate of muon capture by 16O is calculated using the linked cluster expansion to introduce ground state correlations. All diagrams up to the second order in the number of hole-lines are included. [Formula: see text] is reduced by some 15% and is shown to behave like σ−1,. [Formula: see text] and [Formula: see text] are strongly increased by about 30%. This enhancement is related to that part of the defect wave function which arises directly from the tensor component of the N–N potential. It is suggested that, for those transitions that are induced by spin operators, the mean neutrino energy may be smaller than usually thought.

New pulsed-beam measurement of the average polarization of 12B (ground state) produced in the polarized-muon capture reaction 12C(μ−,vμ)12B

1984 ◽  
Vol 148 (4-5) ◽  
pp. 270-274 ◽  
Author(s):  
Y. Kuno ◽  
J. Imazato ◽  
K. Nishiyama ◽  
K. Nagamine ◽  
T. Yamazaki ◽  
...  
Keyword(s):  
Ground State ◽  
Muon Capture ◽  
Capture Reaction ◽  
Average Polarization

Many particle and many hole states in 31Mg

2006 ◽  
Vol 21 (31n33) ◽  
pp. 2461-2467
Author(s):  
Masaaki Kimura
Keyword(s):  
Molecular Dynamics ◽  
Magnetic Moment ◽  
Ground State ◽  
Level Structure ◽  
Magic Number ◽  
Theoretical Framework ◽  
Β Decay ◽  
Generator Coordinate Method ◽  
Coordinate Method ◽  
Generator Coordinate

The low-lying level structure of 31 Mg has been investigated by the theoretical framework of deformed-basis antisymmetrized molecular dynamics (DAMD) plus generator coordinate method (GCM) with the Gogny D1S force. It is shown that the N =20 magic number is broken and the intruder configuration (neutron 2p3h configuration) dominates the ground state. The observed data such as the magnetic moment and β decay strength are well reproduced.

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