Double beta decay ofTe128

Low-Energy Neutrino Physics and Neutrino Mass

“…The upper limits for m~ and r/ (ignoring neutrino mixing) are m~ < 5 eV and r/< 2 x 10-5, independently of the specifics of the calculation, aside from the assumed equality of the matrix elements. The ratio of Kirsten et al, however, disagrees with another geochemical ratio, obtained by Hennecke et al (83), ~r13o/~r~2s = (6.3+0.2) -4. This t 1/2/-t 1/2 result could be interpreted as requiring 0v decay to occur and thus would constitute evidence for lepton-number violation with either m~ ~ 10 eV or /m 5 x 10-5.…”

130Te and 128Te double beta decay half-lives

“…The 130 Te DBDHL calculated from analyses of kitkaite (NiTeSe) [15] falls right in the middle of "short" DBDHL values, lending strong support to the cluster of "short" DBDHL of 130 Te as the correct value. We therefore propose that the 130 Te DBDHL should be 9.0 ± 1.4 × 10 20 yr (as the weighted average of [11][12][13][14][15][16][17][18]) and 128 Te DBDHL should be 2.41 ± 0.39 × 10 24 yr (corresponding to the observed ratio of 128 Te-derived 128 Xe to 130 Te-derived 130 Xe of 3.74 ± 0.10 × 10 −4 [32]). …”

“…The first measurement of the 130 Te DBDHL was made 58 years ago by Ingram and Reynolds [1]. Since then, numerous determinations, performed in different laboratories using tellurium min- erals of different ages, have yielded 130 Te DBDHLs that tend to fall into two distinct groups, 2.5 ± 0.4 × 10 21 yr [2-10] and 8 ± 1 × 10 20 yr [11][12][13][14][15][16][17][18], which clearly differ substantially more than the experimental uncertainties ( Fig. 1).…”

Bazı Tellür İzotoplarının Nötron Yakalama Tesir Kesiti Analizi / Analysis of Some Tellur Isotopes Neutron Capture Cross Sections

“…Tellür izotoplarının beta bozunumuna olan yatkınlığı nedeniyle, bir çok kez bu izotopların çift-beta bozunum analizi yapılmıştır [12][13][14][15][16][17][18]. Diğer bir uygulama alanı ise ağır element nükleosentezindeki hızlı ve yavaş nötron yakalama süreçleridir.…”