Masses ofTe130andXe130and Double-β

Abstract

The atomic masses of 130Te and 130Xe have been obtained by measuring cyclotron frequency ratios of pairs of triply charged ions simultaneously trapped in a Penning trap. The results, with 1 standard deviation uncertainty, are M(130Te)=129.906 222 744(16) u and M(130Xe)=129.903 509 351(15) u. From the mass difference the double-beta-decay Q value of 130Te is determined to be Qbetabeta(130Te)=2527.518(13) keV. This is a factor of 150 more precise than the result of the AME2003 [G. Audi, Nucl. Phys. A729, 337 (2003)10.1016/j.nuclphysa.2003.11.003].

Change of nuclear configurations in the neutrinoless double-βdecay ofTe130→Xe130andEntwisle1, Kay2, Tamii3 et al. 2016Phys. Rev. C295340View full textAdd to dashboardCite

“…130 Te is favorable in terms of its high natural abundance, 34%, and a moderately high Q value of 2527 keV [15,16]. It has a long 2ν2β-decay half life of T 2ν 1/2 = 7.0 × 10 20 yr [17], one of the longest of all candidates.…”

The CUORE and CUORE-0 experiments at Gran Sasso

“…Tellurium is an advantage in this instance because of the relatively high natural abundance (34.2% [7]) of the 0νββ candidate isotope, which means that enrichment is not necessary to achieve a reasonably large active mass. Also, the Q-value (around 2528 keV [8][9][10]) of the decay falls between the peak and the Compton edge of the 2615 keV gamma line of 208 Tl, the highest-energy gamma from the natural decay chains; this leaves a relatively clean window in which to look for the signal. Moreover crystals or TeO 2 can be grown to large size with low radioactive contamination [11].…”

Neutrinoless double-beta decay search with CUORE and CUORE-0 experiments

“…Also, the Q-value around 2528 keV of the decay [15][16][17] falls in a relatively clean window in which to look for the 1 Cuoricino tested also some smaller crystals.…”