Hybridization ofsd- andfp-shell proton orbitals in the systemS36+

Abstract

Experimental and theoretical evidence is presented that the proton exchange is strongly enhanced by a mixing of single-particle configurations in 37 C1 (in the system 36 S+ 37 C1), which is shown to be the clearest example of hybridization in nuclear physics. The experimental data on elastic and inelastic transfer are only reproduced if the complete set of single-particle states (^3/2, ^1/2, fin, pyi, fsn, and pxji) is included in a coupled-reaction-channel calculation. The strong enhancement is explained by the hybridization of orbits of different parity. In a two-center molecular-orbital approach the density of the proton orbitals in the lowest state is shown to be concentrated at the center between the two 36 S cores.3"2+ 0*

A study of coupled-reaction channel effects in the36S +37Cl system, hybridization between single particle orbits

“…These angles correspond to the small angles of the transfer process and represent contributions from partial waves larger than those contributing to the grazing peak. A similar increase of the elastic transfer cross section due to configuration mixing has been observed in the OCRC calculations already published in [11]. In order to have a relation between the two CRC approaches we show later (in Figs.…”

“…In order to have a relation between the two CRC approaches we show later (in Figs. 5 and 6) the results of the OCRC and FRESCO calculations with the parameters as in the case in [11].…”

“…In all calculations shown the prior representation has been used. (In case of OCRC calcula:tion in [11] there is no post-prior difference according to the definition of the interactions in the theory ( [3]). …”

“…The data are compared with coupled reaction channel calculations. Preliminary calculations based on OCRC (Orthogonalized Coupled Reaction Calculation) and the molecular orbital method have been already published in [11] with results obtained using the computer Code and the method described in [-3]. A unique feature is observed, the enhancement of the transfer cross section (of the 9round state transition) with the inclusion of higher lyin9 single particle states.…”

“…The coupling effects due to transfer and inelastic (single particle) transitions as well as collective excitations, are sufficiently strong to induce changes in the OM parameters as compared to cases of no coupling, thus the bare potentials (OM1,OM2,OM3) give no fit to the elastic scattering in the case of no coupling. The OM1 parameters were obtained for the case of no collective coupling, the parameter set OM2 was obtained including all coupling effects, OM3 is the same parameter set as in the CRC calculations in the othogonalized coupled reaction channel approach (OCRC) shown in [11].…”