High-resolution study of theSn116(p,t)reaction and shell model structure of

Calculation of the Transition from Pairing Vibrational to Pairing Rotational Regimes between Magic NucleiSn100andSn132via Two-Nucleon

“…2) that the same level of agreement between theoretical predictions and experimental findings is achieved by using U , V occupation numbers resulting from the BCS diagonalization of a pairing Hamiltonian H p (see above) with constant matrix elements G, than with those resulting from state of the art shell model calculations, which diagonalize an effective interaction derived from the CD-Bonn NN potential, renormalizing its short range repulsion by means of a v low-k approach (see, e.g., [11][12][13][14][15] and references therein). In other words, the properties associated with a coherent state like jBCSi, and thus with the members of the associated pairing rotational band (see Fig.…”

“…Making use of the associated two-particle transfer spectroscopic amplitudes B ¼ ðj þ 1=2Þ 1=2 U ðA À 2ÞV ðAÞ [10], and standard optical parameters [11][12][13][14][15], the absolute differential cross sections associated with the reactions A Snðp; tÞ AÀ2 Snðg:s:Þ (102 A 130) were calculated. In all cases, successive, simultaneous, and nonorthogonality contributions (postrepresentation) to the cross section were considered (see [19][20][21] and references therein, see also [22]).…”

“…We display in Fig. 2 the theoretical predictions in comparison with the experimental data for all of the six mass numbers (A ¼ 124, 122, 120, 118, 116, and 112) for which observations have been carried out ( [11][12][13][14][15]). Theory provides, without any free parameters, an account of the absolute value of all measured differential cross sections within limits well below the (estimated) 15% (systematic) experimental error, and almost within statistical errors.…”

“…The absolute values of the g:s: ! g:s: integrated cross sections (in b units) are given (perpendicular) to the abscissa, as a function of N.In the shaded areas we report the experimental values[11][12][13][14][15], while the remaining values correspond to theoretical predictions integrated in the range 0 80 . For the first group (experimental), we also report (in parenthesis), the relative (in %) (p, t), pairing vibrational, cross sections P i ðg:s: !…”

High-resolution measurement of theSn118,124(p,Guazzoni1, Zetta2, Covello3 et al. 2011Phys. Rev. CSelf Cite425350View full textAdd to dashboardCite

“…The (p,t) reaction on even Sn isotopes 112, 116, 120, and 122 [1][2][3][4] was systematically studied by our group starting from 1998. This paper, devoted to the measurement and analysis of 118,124 Sn(p,t) 116,122 Sn reactions, will complete the study.…”