Detecting small effects in molecules by high-resolution spectroscopy: From nuclear hexadecapole coupling to parity violation and the change of fundamental constants in space-time

2012 ◽  
Author(s):  
Peter Schwerdtfeger
Keyword(s):  
High Resolution ◽  
Parity Violation ◽  
Space Time ◽  
High Resolution Spectroscopy ◽  
Fundamental Constants

scholarly journals High resolution spectroscopy of methyltrioxorhenium: towards the observation of parity violation in chiral molecules

2011 ◽  
Vol 13 (3) ◽  
pp. 854-863 ◽  
Author(s):  
Clara Stoeffler ◽  
Benoît Darquié ◽  
Alexander Shelkovnikov ◽  
Christophe Daussy ◽  
Anne Amy-Klein ◽  
...  
Keyword(s):  
High Resolution ◽  
Parity Violation ◽  
High Resolution Spectroscopy ◽  
Chiral Molecules

scholarly journals Fundamental constants and high-resolution spectroscopy

2014 ◽  
Vol 335 (1) ◽  
pp. 83-91 ◽  
Author(s):  
P. Bonifacio ◽  
H. Rahmani ◽  
J.B. Whitmore ◽  
M. Wendt ◽  
M. Centurion ◽  
...  
Keyword(s):  
High Resolution ◽  
High Resolution Spectroscopy ◽  
Fundamental Constants

Microcalorimeters for X-Ray Spectroscopy

1988 ◽  
Vol 102 ◽  
pp. 41
Author(s):  
E. Silver ◽  
C. Hailey ◽  
S. Labov ◽  
N. Madden ◽  
D. Landis ◽  
...  
Keyword(s):  
High Resolution ◽  
High Efficiency ◽  
Thermal Response ◽  
Low Noise ◽  
High Resolution Spectroscopy ◽  
Superconducting Transition ◽  
Sapphire Substrates ◽  
Laboratory Plasmas ◽  
Adiabatic Demagnetization ◽  
Theoretical Predictions

The merits of microcalorimetry below 1°K for high resolution spectroscopy has become widely recognized on theoretical grounds. By combining the high efficiency, broadband spectral sensitivity of traditional photoelectric detectors with the high resolution capabilities characteristic of dispersive spectrometers, the microcalorimeter could potentially revolutionize spectroscopic measurements of astrophysical and laboratory plasmas. In actuality, however, the performance of prototype instruments has fallen short of theoretical predictions and practical detectors are still unavailable for use as laboratory and space-based instruments. These issues are currently being addressed by the new collaborative initiative between LLNL, LBL, U.C.I., U.C.B., and U.C.D.. Microcalorimeters of various types are being developed and tested at temperatures of 1.4, 0.3, and 0.1°K. These include monolithic devices made from NTD Germanium and composite configurations using sapphire substrates with temperature sensors fabricated from NTD Germanium, evaporative films of Germanium-Gold alloy, or material with superconducting transition edges. A new approache to low noise pulse counting electronics has been developed that allows the ultimate speed of the device to be determined solely by the detector thermal response and geometry. Our laboratory studies of the thermal and resistive properties of these and other candidate materials should enable us to characterize the pulse shape and subsequently predict the ultimate performance. We are building a compact adiabatic demagnetization refrigerator for conveniently reaching 0.1°K in the laboratory and for use in future satellite-borne missions. A description of this instrument together with results from our most recent experiments will be presented.

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