the observed average final energies. On the basis of these initial conditions we further calculated by the method of Boneh, Fraenkel, and Nebenzahl 5 the average energy of the 5 He at the time of its decay taking into consideration its exponential decay with a half-life of 8 xlO" 22 sec. This curve is also shown in Fig. 3. The measured average energy of the 5 He at the time of breakup (6.3 ±0.8 MeV) yields a unique graphical solution to the initial conditions, i.e., E F (0) = 40 ±11 MeV and £ 5 (0) = 3.9±0.9 MeV. This solution applies only to neutrons which are coincident with a particles above 9 MeV. An approximate correction for the missing events gives E F (0) = 31 ± 11 MeV and £ 5 (0) = 3.2 ±0.9 MeV.The average initial conditions obtained here for the emission of 5 He are similar to those obtained in Ref. 5 from trajectory calculations which were used to reproduce the properties of the longrange a particles in spontaneous fission of 252 Cf and in particular their angular distribution relative to the fragments. Our results are also in good agreement with a similar trajectory calculation performed by Musgrove 6 who fitted his calculation to the experimental angular distribution of Raisbeck and Thomas 7 which is narrower than the experimental angular distribution 8 used by Boneh, Fraenkel, and Nabenzahl. Rajagopalan and Thomas 9 recently remeasured this angular distribution and found it to be in substantial agreement with the results of Raisbeck and Thomas. 10 We have also performed trajectory calculations in which E F (0) is a Gaussian distribution with cr = 12 MeV and a mean E F (0) = 28 MeV,The investigation of four-particle configurations in nuclei has recently been extended from nuclei of the sd shell into the Ni region 1 " 3 via the ( le O, 12 C) reaction. However, extraction of reliable spectroscopic information is difficult because of the strong Q -value dependence of the cross section 4 and the uncertainties in knowing E 5 (0) has a Maxwellian distribution with E s (0) = 3.0 MeV, and the initial emission of the 5 He is isotropic between 30° and 150° with respect to the fragment direction. The calculated a spectrum (which takes into account the lifetime of 5 He and the backward recoil of the a in the 5 He decay) is shown in Fig. 2 to be in good agreement with the experimental results. 9) also made trajectory calculations to fit their experimental results. They state (Ref. 9) that their results are in substantial agreement with the results of Musgrove (Ref. 6) despite the fact that they obtain a much lower fragment kinetic energy at scission (7.5 MeV versus 25 MeV of Ref. 6).the various configurations of the transferred fournucleon cluster. 5 A more attractive approach is the ( 6 Li,d) reaction which extensive studies 6 " 7 on light nuclei have shown to be a good a -transfer reaction. Furthermore, distorted-wave Bornapproximation (DWBA) calculations 7 indicate that the Q-value dependence of the cross section is ( 6 Li, tf)on 58 Niand 64 NiThe ( 6 Li,d) reaction has been performed on 58 Ni and 64 Ni at 38 ...