XIII. Gamma emission in the (2n) transfer reaction 116 Sn + 60 Ni→ 114 Sn(gs) + 62 Ni(gs) (E cm =154.26 MeV, θ cm = 140 • for 114 Sn(gs), D 0 = 13.49 fm) 10 A. Differential cross section 12 1. Change of reference frames 14 B. Dipole length and orientation in Cooper pair transfer 15 C. Maximum of the angular distribution 15 D. Gamma emission in the (1n) transfer reaction 116 Sn + 60 Ni→ 115 Sn(gs) + 61 Ni(gs) (E cm =154.26 MeV, θ cm = 140 • for 115 Sn, D 0 = 13.49 fm) 15 XIV. Analysis of the γ spectra of the 60 Ni+ 116 Sn experiment with the AGATA demonstrator array 17 A. Simulations 17 XV. Conclusions 18 XVI. Hindsight 18 XVII. Acknowledgments 19 A. Rotations in gauge space 20 B. Nuclear pairing rotational bands and Nernst theorem 21 C. Degrees of freedom of rotations in 3D-space 21 D. (ac) Josephson effect 22 E. Relation between bias and Josephson frequency 23 F. Relation between normal and abnormal density 24 G. Single fermion tunneling probability 24 Electrons 24 Nucleons 24

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