Masses of Ar-32 and Ar-33 for Fundamental Tests
|Title||Masses of Ar-32 and Ar-33 for Fundamental Tests|
|Publication Type||Journal Article|
|Year of Publication||2003|
|Authors||Blaum, K., Audi G., Beck D., Bollen G., Herfurth F., Kellerbauer A., Kluge H. - J., Sauvan E., and Schwarz S.|
|Journal||Phys. Rev. Lett.|
|Full Text|| |
Masses of the short-lived radionuclides 32Ar (T1/2=98 ms) and 33Ar (T1/2=173 ms) have been determined with the Penning trap mass spectrometer ISOLTRAP. Relative uncertainties of 6.0×10-8 (δm=1.8 keV) and 1.4×10-8 (δm=0.44 keV), respectively, have been achieved. At present, these new mass data serve as the most stringent test of the quadratic form of the isobaric-multiplet mass equation. Furthermore, the improved accuracy for the mass of 32Ar will allow for a better constraint on scalar contributions to the weak interaction. New mass values have also been measured for 44Ar and 45Ar, and a 20σ deviation for 44Ar from the literature value was found and interpreted.