scholarly journals Frequency shifts in gravitational resonance spectroscopy

2015 ◽  
Vol 91 (4) ◽  
Author(s):  
S. Baeßler ◽  
V. V. Nesvizhevsky ◽  
G. Pignol ◽  
K. V. Protasov ◽  
D. Rebreyend ◽  
...  
Keyword(s):  
Resonance Spectroscopy ◽  
Frequency Shifts ◽  
Gravitational Resonance

Publisher’s Note: Frequency shifts in gravitational resonance spectroscopy [Phys. Rev. D91, 042006 (2015)]

2015 ◽  
Vol 91 (6) ◽  
Author(s):  
S. Baeßler ◽  
V. V. Nesvizhevsky ◽  
G. Pignol ◽  
K. V. Protasov ◽  
D. Rebreyend ◽  
...  
Keyword(s):  
Resonance Spectroscopy ◽  
Frequency Shifts ◽  
Gravitational Resonance

scholarly journals Gravitational Resonance Spectroscopy with an Oscillating Magnetic Field Gradient in the GRANIT Flow through Arrangement

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
G. Pignol ◽  
S. Baeßler ◽  
V. V. Nesvizhevsky ◽  
K. Protasov ◽  
D. Rebreyend ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Energy Spectrum ◽  
Field Gradient ◽  
Magnetic Field Gradient ◽  
Resonance Spectroscopy ◽  
Magnetic Excitation ◽  
Flow Through ◽  
Oscillating Magnetic Field ◽  
Gravitational Resonance ◽  
Resonant Transitions

Gravitational resonance spectroscopy consists in measuring the energy spectrum of bouncing ultracold neutrons above a mirror by inducing resonant transitions between different discrete quantum levels. We discuss how to induce the resonances with a flow through arrangement in the GRANIT spectrometer, excited by an oscillating magnetic field gradient. The spectroscopy could be realized in two distinct modes (so called DC and AC) using the same device to produce the magnetic excitation. We present calculations demonstrating the feasibility of the newly proposed AC mode.

Spectroscopic imaging of human disease

1996 ◽  
Vol 54 ◽  
pp. 884-885
Author(s):  
D.J. Meyerhoff
Keyword(s):  
Magnetic Field ◽  
Magnetic Resonance ◽  
Field Gradient ◽  
Human Disease ◽  
Morphological Changes ◽  
Magnetic Field Gradient ◽  
Spectroscopic Imaging ◽  
Resonance Spectroscopy ◽  
Tissue Water

Magnetic Resonance Imaging (MRI) observes tissue water in the presence of a magnetic field gradient to study morphological changes such as tissue volume loss and signal hyperintensities in human disease. These changes are mostly non-specific and do not appear to be correlated with the range of severity of a certain disease. In contrast, Magnetic Resonance Spectroscopy (MRS), which measures many different chemicals and tissue metabolites in the millimolar concentration range in the absence of a magnetic field gradient, has been shown to reveal characteristic metabolite patterns which are often correlated with the severity of a disease. In-vivo MRS studies are performed on widely available MRI scanners without any “sample preparation” or invasive procedures and are therefore widely used in clinical research. Hydrogen (H) MRS and MR Spectroscopic Imaging (MRSI, conceptionally a combination of MRI and MRS) measure N-acetylaspartate (a putative marker of neurons), creatine-containing metabolites (involved in energy processes in the cell), choline-containing metabolites (involved in membrane metabolism and, possibly, inflammatory processes),

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