Modified interaction radius and touching spheres schemes for the determination of impact parameter in Coulomb excitation experiments

2015 ◽  
Vol 30 (30) ◽  
pp. 1550148 ◽  
Author(s):  
Rajiv Kumar ◽  
Pardeep Singh ◽  
Rajesh Kharab
Keyword(s):  
Impact Parameter ◽  
Coulomb Barrier ◽  
Coulomb Excitation ◽  
Interaction Radius ◽  
Minimum Value ◽  
Dependent Term ◽  
Energy Dependent

The parametrization schemes based on interaction radius and touching spheres (ts) commonly used for the determination of minimum value of impact parameter [Formula: see text] in the above barrier Coulomb excitation experiments are modified by incorporating an energy-dependent term. The modification leads to about 13% improvement in the value of [Formula: see text] for a variety of projectile target combinations at above Coulomb barrier incident energies.

Quantum Resonances: Line Profiles and Dynamics

2003 ◽  
Vol 68 (3) ◽  
pp. 529-553 ◽  
Author(s):  
Ivana Paidarová ◽  
Philippe Durand
Keyword(s):  
Hydrogen Atom ◽  
Operator Theory ◽  
Quantum Dynamics ◽  
Line Profiles ◽  
Static Electric Field ◽  
Reversal Effect ◽  
Quantum Resonances ◽  
Energy Dependent ◽  
Effective Hamiltonians

The wave operator theory of quantum dynamics is reviewed and applied to the study of line profiles and to the determination of the dynamics of interacting resonances. Energy-dependent and energy-independent effective Hamiltonians are investigated. The q-reversal effect in spectroscopy is interpreted in terms of interfering Fano profiles. The dynamics of an hydrogen atom subjected to a strong static electric field is revisited.

Determining the energy-dependent X-ray flux variation of a synchrotron beamline using Laue diffraction patterns

2011 ◽  
Vol 44 (1) ◽  
pp. 177-183 ◽  
Author(s):  
Catherine Dejoie ◽  
Martin Kunz ◽  
Nobumichi Tamura ◽  
Colin Bousige ◽  
Kai Chen ◽  
...  
Keyword(s):  
Incident Energy ◽  
Flux Variation ◽  
Laue Diffraction ◽  
X Ray ◽  
Measured Flux ◽  
Highly Sensitive ◽  
Diffraction Patterns ◽  
Energy Dependent ◽  
Flux Curve

Although the spectrum originating from a superconducting bending magnet is quasi-continuous, it shows important intensity variations through its spectral range. A method to determine the incident energy-dependent flux variation based on the comparison between observed intensities and the calculated intensities of a well known structure (calcite) is presented here. It is found that the measured flux is highly sensitive to the use of correct Debye–Waller factors for the atoms of the standard crystal. By using the measured flux curve, it was possible to unambiguously index the Laue diffraction pattern of a trigonal crystal structure in its hexagonal setting. This is a crucial but difficult first step for the determination of strain and stress in materials with this symmetry, such as quartz, Mg, Ti, Znetc.

Determination of dissociation energies by use of energy-dependent decay pathway branching ratios

2001 ◽  
Vol 346 (1-2) ◽  
pp. 117-122 ◽  
Author(s):  
M Vogel ◽  
K Hansen ◽  
A Herlert ◽  
L Schweikhard
Keyword(s):  
Branching Ratios ◽  
Dissociation Energies ◽  
Energy Dependent

Determination of the Static Quadrupole Moment of the First2+State inEr170by Coulomb Excitation UsingBr81Projectiles

1973 ◽  
Vol 8 (1) ◽  
pp. 391-397 ◽  
Author(s):  
Wendell R. Lutz ◽  
James A. Thomson ◽  
Rolf P. Scharenberg ◽  
Ronald D. Larsen ◽  
Roderick G. Kerr
Keyword(s):  
Quadrupole Moment ◽  
Coulomb Excitation ◽  
Static Quadrupole

scholarly journals Search for Isovector Valence-Shell Excitations in 140Nd and 142Sm via Coulomb excitation reactions of radioactive ion beams

2018 ◽  
Vol 194 ◽  
pp. 03003 ◽  
Author(s):  
Ralph Kern ◽  
Robert Stegmann ◽  
Norbert Pietralla ◽  
Georgi Rainovski ◽  
Liam Paul Gaffney ◽  
...  
Keyword(s):  
Excited States ◽  
Coulomb Excitation ◽  
Ion Beams ◽  
Radioactive Ion Beams ◽  
Silicon Strip Detector ◽  
Electromagnetic Transition ◽  
Mixed Symmetry ◽  
Transition Matrix Elements ◽  
Γ Rays

Projectile Coulomb excitation experiments were performed at HIE-ISOLDE at CERN with the radioactive ion beams of 140Nd and 142Sm. Ions with an energy of 4:62 MeV/A were impinging on a 1.45 mg/cm2 thick 208Pb target. The γ-rays depopulating the Coulomb-excited states were recorded by the HPGe-array MINIBALL and scattered particles were detected by a double-sided silicon strip detector. Experimental intensities were used for the determination of electromagnetic transition matrix elements. A preliminary result of the B(M1; 2+3 → 2+1) of 140Nd and an upper limit for the case of 142Sm are revealing the main fragments of the proton-neutron mixed-symmetry 2+1;ms states.

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