scholarly journals Investigation of the Transient Field at High Velocities by magnetic-moment measurements in 74Ge and 70Zn

2019 ◽  
Vol 18 ◽  
pp. 135
Author(s):  
T. J. Mertzimekis
Keyword(s):  
Angular Correlation ◽  
Excited States ◽  
Magnetic Moment ◽  
Magnetic Moments ◽  
Research Work ◽  
Transient Field ◽  
Radioactive Beams ◽  
Field Technique ◽  
Experiment Method ◽  
Experimental Facilities

The advent of radioactive beams at large experimental facilities has moti- vated extensive research work on the expansion of techniques to accommodate higher ion velocities. The application of the Transient Field technique in measuring magnetic moments of excited states in energetic nuclei is investigated at the INFN-LNS in Catania by means of re-measuring the g(2+1 ) factors in 74Ge and 70Zn. The description of the experiment method and some preliminary angular correlation results are presented.

scholarly journals Measurement of g factors of excited states in radioactive beams by the transient field technique: 132Te

2008 ◽  
Vol 664 (4-5) ◽  
pp. 241-245 ◽  
Author(s):  
N. Benczer-Koller ◽  
G.J. Kumbartzki ◽  
G. Gürdal ◽  
C.J. Gross ◽  
A.E. Stuchbery ◽  
...  
Keyword(s):  
Excited States ◽  
Transient Field ◽  
Radioactive Beams ◽  
Field Technique ◽  
G Factors

Shell closure effects in the stable74–82Se isotopes from magnetic moment measurements using projectile excitation and the transient field technique

1998 ◽  
Vol 57 (5) ◽  
pp. 2181-2188 ◽  
Author(s):  
K.-H. Speidel ◽  
N. Benczer-Koller ◽  
G. Kumbartzki ◽  
C. Barton ◽  
A. Gelberg ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Shell Closure ◽  
Transient Field ◽  
Field Technique

Analytical solution for magnetic moments of Λ-hypernuclei in a relativistic approach

2019 ◽  
Vol 28 (05) ◽  
pp. 1950033 ◽  
Author(s):  
S. Mohammad Moosavi Nejad ◽  
A. Armat
Keyword(s):  
Wave Function ◽  
Analytical Solution ◽  
Excited States ◽  
Magnetic Moment ◽  
Magnetic Moments ◽  
Spin Orbital ◽  
Direct Information ◽  
Central Potential ◽  
Highly Sensitive ◽  
Relativistic Approach

The magnetic moments of [Formula: see text]-hypernuclei are the most interesting observables which provide a highly sensitive probe of lambda in the hypernuclei structure and also supply direct information on hyperon–nucleon interactions. In this work, in a relativistic approach we analytically determine the magnetic moment of several [Formula: see text]-hypernuclei such as [Formula: see text], [Formula: see text] and [Formula: see text] in their ground and excited states, i.e., the [Formula: see text], [Formula: see text] and [Formula: see text] states. For our analysis, we consider the central potential of Wood–Saxon and the spin-orbital potential and determine the wave function of hypernuclei. Then, we compute the Dirac, the anomalous and the total magnetic moments of the ground and excited states of [Formula: see text]-hypernuclei.

scholarly journals g-factors of some excited states in 49,50Cr

2019 ◽  
Vol 3 ◽  
pp. 205
Author(s):  
A. A. Pakou ◽  
J. Billowes ◽  
A. W. Mountford ◽  
C. Tenreiro ◽  
D. D. Warner
Keyword(s):  
Magnetic Field ◽  
Excited States ◽  
Ground State ◽  
Experimental Error ◽  
Magnetic Moments ◽  
Transient Field ◽  
Ground State Band ◽  
Model Calculations ◽  
State Band ◽  
G Factors

Magnetic moments of the first excited states in 50Cr and of the 7/2" and 19/2' states in 49Cr, have been measured by the transient field technique. The states were excited by the inverse reaction 40Ca + 12C and the recoil nuclei traversed a thick gadolinium foil. The observed rotations, of the 2+, 4+, 6+, 8+ states of the ground-state band in 50Cr, were found into the experimental error to be the same, suggesting similar g-factors for these states and thus supporting a high collectivity for the ground-state band, g-factors of the 7/2' and 19/2 states in 49Cr, were deduced by adopting both an overall parametrization of the transient magnetic field in Gd and by comparing the 49Cr rotations with rotations of states with known magnetic moments, as the 2+ ones of 50Cr and of 46Ti which was also populated in the same reaction. Both methods gave similar results and the g-factors adopted for the 19/2" and 7/2" states were + 0.78(17) and +0.35(7) respectively. These results are discussed in terms of cranked shell model calculations and are found to support a proton alignment in the f7/2 shell.

scholarly journals The Application of the High-Velocity Transient Field for the g(2^+_1) Measurement in the Neutron-rich 72Zn

2013 ◽  
Vol 20 ◽  
pp. 44
Author(s):  
T. J. Mertzimekis ◽  
For the GANIL E535 Collaboration
Keyword(s):  
Magnetic Fields ◽  
Hyperfine Field ◽  
Magnetic Moment ◽  
High Velocity ◽  
Coulomb Excitation ◽  
Radioactive Beam ◽  
Transient Field ◽  
Radioactive Beams ◽  
Hyperfine Fields ◽  
Radioactive Beam Facilities

The first successful application of the recently developed High-Velocity Transient Field Technique (HVTF) on European soil was performed at GANIL. HVTF is an extension of the well established Transient Field (TF) technique, which utilizes immense hyperfine magnetic fields (10-100 kG) capable of inducing a spin precession of an excited nucleus. With the advent of radioactive beams, detailed explorations of such hyperfine fields have been carried out at larger-than-usual ion velocities in an effort to introduce the technique to large radioactive beam facilities. The neutron-rich radioactive 72Zn isotope is an ideal playground for HVTF. Coulomb excitation populated the 2^+_1 state in 72Zn nuclei, produced as fast secondary beams at GANIL and INFN-LNS, aiming to (a) calibrate the hyperfine field at these beam energies and (b) measure the g factor of 2^+_1 directly. The outcome of these experiments are reported and the application of the HVTF to magnetic-moment measurements are briefly described.

scholarly journals Spin Gapless Semiconductor–Nonmagnetic Semiconductor Transitions in Fe-Doped Ti2CoSi: First-Principle Calculations

2018 ◽  
Vol 8 (11) ◽  
pp. 2200 ◽  
Author(s):  
Yu Feng ◽  
Zhou Cui ◽  
Ming-sheng Wei ◽  
Bo Wu ◽  
Sikander Azam
Keyword(s):  
Magnetic Moment ◽  
Electronic Structures ◽  
Magnetic Moments ◽  
Total Magnetic Moment ◽  
First Principle ◽  
Half Metallic ◽  
Heusler Compound ◽  
First Principle Calculations ◽  
Metallic Ferromagnet

Employing first-principle calculations, we investigated the influence of the impurity, Fe atom, on magnetism and electronic structures of Heusler compound Ti2CoSi, which is a spin gapless semiconductor (SGS). When the impurity, Fe atom, intervened, Ti2CoSi lost its SGS property. As TiA atoms (which locate at (0, 0, 0) site) are completely occupied by Fe, the compound converts to half-metallic ferromagnet (HMF) TiFeCoSi. During this SGS→HMF transition, the total magnetic moment linearly decreases as Fe concentration increases, following the Slate–Pauling rule well. When all Co atoms are substituted by Fe, the compound converts to nonmagnetic semiconductor Fe2TiSi. During this HMF→nonmagnetic semiconductor transition, when Fe concentration y ranges from y = 0.125 to y = 0.625, the magnetic moment of Fe atom is positive and linearly decreases, while those of impurity Fe and TiB (which locate at (0.25, 0.25, 0.25) site) are negative and linearly increase. When the impurity Fe concentration reaches up to y = 1, the magnetic moments of Ti, Fe, and Si return to zero, and the compound is a nonmagnetic semiconductor.

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