Data for two-nucleon transfer reactions on even tungsten nuclei are presented. Several systematic features emerge from the data and are discussed in detail. These include the influence of multistep processes on angular distribution shapes. The systematic behavior of excited $0^{+}$ strengths is shown to arise from two types of excitation, one associated with a subshell gap at $N=108\mathrm{}$, the other being of the pairing isomer type.

NUCLEAR REACTIONS ${}_{}{}^{186,184,182,180}{}_{}{}^{}\mathrm{W}$($p$,$t$), $E_p=21\mathrm{}$ MeV; measured $\sigma (E_t,\Theta )$. ${}_{}{}^{180}{}_{}{}^{}\mathrm{W}$($t$,$p$); $E_t=15\mathrm{}$ MeV; measured $\sigma (E_p,\Theta )$. ${}_{}{}^{184,182,180,178}{}_{}{}^{}\mathrm{W}$ deduced levels, $L$, $\pi$, $J$. Nuclear structure analysis.

• Received 20 August 1979

DOI:https://doi.org/10.1103/PhysRevC.21.2275