Challenges in Double Beta Decay

Table 4

Best reported results on 𝛽𝛽 processes. 𝛽𝛽(0𝜈) limits are at 90% C.L. Where nonexplicitely referenced, the effective neutrino mass ranges are obtained according to the QRPA calculations reported in Table 2.

Isotope	𝑇^2𝜈1/2	𝑇^0𝜈1/2	|⟨𝑚𝜈⟩|
	(10^19 yr)	(10^24 yr)	(eV)
48Ca	(4.4^+0.6−0.5) [142–144]	>0.058 [145]	<19–36
76Ge	(150±10) [124, 146–148]	22.3^+4.4−3.1 [81]	0.32^+0.03−0.03 [81]
		>19 [71]	<0.17–0.29
		>15.7 [72]	<0.19–0.32
^82Se	(9.2±0.7) [149, 150]	>0.36 [90]	<1.23–1.88
^96Zr	(2.3±0.2) [151]	>0.0092 [151]	<5.24–10.83
^100Mo	(0.71±0.04) [152, 153]	>1.1 [90]	<0.71–1.05
^116Cd	(2.8±0.2) [144, 154–156]	>0.17 [155]	<1.64–2.69
^130Te	70^+9−11 [157, 158]	>2.8 [159]	<0.45–0.70
^136Xe	(217±6) [86]	>1.6 [160]	<2.10–3.37
^150Nd	(0.82±0.09) [153, 161]	>0.018 [161]	<9.01–16.07