Q(EC) value of the superallowed beta emitter Sc-42

Eronen, T; Hardy, JC; Canete, L; Jokinen, A; Hakala, J; Kankainen, A; Kolhinen, VS; Koponen, J; Moore, ID; Murray, IM; Penttila, H; Pohjalainen, I; Poleshchuk, Oleksii; Reinikainen, J; Rinta-Antila, S; Soukouti, N; Voss, A; Aysto, J

doi:10.1103/PhysRevC.95.025501

Q(EC) value of the superallowed beta emitter Sc-42

Author:

Eronen, T

Hardy, JC ; Canete, L ; Jokinen, A ; Hakala, J ; Kankainen, A ; Kolhinen, VS ; Koponen, J ; Moore, ID ; Murray, IM ; Penttila, H ; Pohjalainen, I ; Poleshchuk, Oleksii ; Reinikainen, J ; Rinta-Antila, S ; Soukouti, N ; Voss, A ; Aysto, J

Keywords:

Science & Technology, Physical Sciences, Physics, Nuclear, Physics, PRECISION MASS-SPECTROMETRY, PENNING TRAPS, RAMSEY METHOD, JYFLTRAP, ION, ELECTRON, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, 5106 Nuclear and plasma physics

Abstract:

The QEC value of the superallowed β+ emitter 42Sc has been measured with the JYFLTRAP Penning-trap mass spectrometer at the University of Jyväskylä to be 6426.350(53) keV. This result is at least a factor of four more precise than all previous measurements, which were also inconsistent with one another. As a byproduct we determine the excitation energy of the 7+ isomeric state in 42Sc to be 616.762(46) keV, which deviates by 8σ from the previous measurement.