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Neutron pair correlations in A=100 nuclei involved in neutrinoless double-$\beta$ decay

Authors :
Thomas, J. S.
Freeman, S. J.
Deibel, C. M.
Faestermann, T.
Hertenberger, R.
Kay, B. P.
McAllister, S. A.
Mitchell, A. J.
Schiffer, J. P.
Sharp, D. K.
Wirth, H. F.
Source :
Phys. Rev. C, 86, 047304 (2012)
Publication Year :
2012

Abstract

The pairing properties of the neutrinoless double beta decay $(0\nu2\beta)$ candidate $^{100}$Mo have been studied, along with its daughter $^{100}$Ru, to provide input for nuclear matrix element calculations relevant to the decay. The $(p,t)$ two-neutron transfer reaction was measured on nuclei of $^{102,100}$Ru and $^{100,98}$Mo. The experiment was designed to have particular sensitivity to $0^{+}$ states up to excitation energies of $\sim 3$ MeV with high energy resolution. Measurements were made at two angles and L=0 transitions identified by the ratio of yields between the two angles. For the reactions leading to and from $^{100}$Ru, greater than 95% of the L=0 $(p,t)$ strength was in the ground state, but in $^{100}$Mo about 20% was in excited $0^{+}$ states. The measured $(p,t)$ data, together with existing $(t,p)$ data, suggest that $^{100}$Mo is a shape-transitional nucleus while $^{100}$Ru is closer to the spherical side of that transition. Theoretical calculations of the $0\nu2\beta$ nuclear matrix element may be complicated by this difference in shape.<br />Comment: 5 pages, 2 figures

Subjects

Subjects :
Nuclear Experiment

Details

Database :
arXiv
Journal :
Phys. Rev. C, 86, 047304 (2012)
Publication Type :
Report
Accession number :
edsarx.1210.2638
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevC.86.047304