2023 Impact factor 4.2
Particles and Fields

Eur. Phys. J. C 19, 43-55
DOI: 10.1007/s100520100594

High sensitivity 2$\beta $ decay study of 116Cd and 100Mo with the BOREXINO counting test facility (CAMEO project)

G. Bellini1, B. Caccianiga1, M. Chen2, F.A. Danevich3, M.G. Giammarchi1, V.V. Kobychev3, B.N. Kropivyansky3, E. Meroni1, L. Miramonti1, A.S. Nikolayko3, L. Oberauer4, O.A. Ponkratenko3, V.I. Tretyak3, S.Yu. Zdesenko3 and Yu.G. Zdesenko3

1  Physics Department of the University and INFN, 20133 Milano, Italy
2  Department of Physics, Queen's University, Kingston, Canada
3  Institute for Nuclear Research, MSP 03680 Kiev, Ukraine
4  Technical University Munich, Garching, Germany

(Received: 20 July 2000 / Revised version: 9 January 2001 / Published online: 23 February 2001 -© Springer-Verlag 2001)

The unique features (super-low background and large sensitive volume) of the CTF and BOREXINO set ups are used in the CAMEO project for a high sensitivity study of 100Mo and 116Cd neutrinoless 2$\beta $ decay. Pilot measurements with 116Cd and Monte Carlo simulations show that the sensitivity of the CAMEO experiment (in terms of the half-life limit for $
0\nu 2\beta $ decay) is $\approx $4$\times $1024 yr with a 1 kg source of 100Mo and $\approx $1026 yr with $\approx $100 kg of enriched 116CdWO4 crystals placed in the liquid scintillator of the CTF. The last value corresponds to a limit on the neutrino mass of $m_\nu \leq 0.06$ eV. Similarly with 1000 kg of 116CdWO4 crystals located in the BOREXINO apparatus the neutrino mass limit can be pushed down to $m_\nu \leq
0.02$ eV.

© Società Italiana di Fisica, Springer-Verlag 2001