scholarly journals Isotope Shifts in High Lying Levels of Dy I and Er I by High-Resolution UV Laser Spectroscopy

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Wei-Guo Jin ◽  
Hiroaki Ono ◽  
Tatsuya Minowa

High-resolution atomic-beam ultraviolet (UV) laser spectroscopy in Dy I and Er I has been performed. Isotope shifts have been measured for two transitions in Dy I and one transition in Er I. Specific mass shifts and field shifts have been derived for the studied transitions, and large differences between the two – transitions in Dy I have been found. From the derived specific mass shifts and field shifts, configuration mixing at the upper levels of transitions has been discussed.

With the use of enriched isotopes of ruthenium, the isotope shifts in six lines of the arc spectrum of 44 Ru were studied. A Fabry-Perot etalon, with multiple dielectric coatings, provided the high resolution required. Shifts between all the stable isotopes were measured accurately in the line λ4372 Å, and several shifts were measured in the other five lines. A treatment of the combined results made it possible to derive a relation between the various specific mass shifts. From this, all the specific mass shifts could be determined if one were known. An estimate was made of the proportion of the shift due to mass effects and that due to nuclear volume effects in the different lines. The estimated nuclear volume shifts in λ4372 Å were: 96-98 39.6 mK, 98-99 11.3 mK , 99-100 23.7 mK , 100-101 7.1 mK, 101-102 24.9 mK, and 102-104 35.2 mK. The order of magnitude of the configuration mixing in some odd levels was also found.


1991 ◽  
Vol 44 (3) ◽  
pp. R1442-R1445 ◽  
Author(s):  
D. Kowalewska ◽  
K. Bekk ◽  
S. Göring ◽  
A. Hanser ◽  
W. Kälber ◽  
...  

1978 ◽  
Vol 18 (5) ◽  
pp. 2342-2354 ◽  
Author(s):  
G. Huber ◽  
F. Touchard ◽  
S. Büttgenbach ◽  
C. Thibault ◽  
R. Klapisch ◽  
...  

Two lines in the arc spectrum of platinum have been studied by high resolution interferometry, and results have been obtained for the isotope shifts in both lines. No evidence is found for large specific mass effects and, after allowance for normal mass effects, the results for the two lines give the following relative field isotope shifts: 192-194: 194-196: 196-198 = 0.895 ± 0.009: 0.919 ± 0.004:1 and 194-195: 194-196 = 0.458 ± 0.003; these values are compared with the relative isotope shifts in mercury and thallium. Differences in the mean square radius of the proton distribution for the platinum isotopes are calculated from the field isotope shifts. The contribution of changes in nuclear deformation to the shifts is discussed.


1979 ◽  
Vol 20 (6) ◽  
pp. 2457-2457 ◽  
Author(s):  
G. Huber ◽  
F. Touchard ◽  
S. Büttgenbach ◽  
C. Thibault ◽  
R. Klapisch ◽  
...  

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