title: Masses of 32Ar and 33Ar for fundamental tests.
abstract: Masses of the short-lived radionuclides 32Ar (T(1/2)=98 ms) and 33Ar (T(1/2)=173 ms) have been determined with the Penning trap mass spectrometer ISOLTRAP. Relative uncertainties of 6.0x10(-8) (deltam=1.8 keV) and 1.4x10(-8) (deltam=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 20sigma deviation for 44Ar from the literature value was found and interpreted.
authors.affiliation: CERN, Division EP, 1211 Geneva 23, Switzerland and GSI, Planckstrasse 1, 64291 Darmstadt, Germany. Klaus.Blaum@CERN.ch
authors.forename: K
authors.initials: K
authors.lastname: Blaum
authors.forename: G
authors.initials: G
authors.lastname: Audi
authors.forename: D
authors.initials: D
authors.lastname: Beck
authors.forename: G
authors.initials: G
authors.lastname: Bollen
authors.forename: F
authors.initials: F
authors.lastname: Herfurth
authors.forename: A
authors.initials: A
authors.lastname: Kellerbauer
authors.forename: H-J
authors.initials: HJ
authors.lastname: Kluge
authors.forename: E
authors.initials: E
authors.lastname: Sauvan
authors.forename: S
authors.initials: S
authors.lastname: Schwarz