Search

Data are presented for the (/sup 3/He, t) reaction at energies of 600 MeV, 1.2 GeV, and 2 GeV on targets /sup nat/C, /sup 54/Fe, and /sup 89/Y. The low--excitation-energy regions of the spectra are dominated by isospin-spin excitations. Cross-section calculations in distorted-wave impulse approximation with parameters from NN data account reasonably well for the data. At 2-GeV bombarding energy a strong excitation of the ..delta.. resonance is observed for all targets.

The reaction $^{6}\mathrm{Li}(p, {\ensuremath{\Delta}}^{++})^{6}\mathrm{He}$ has been studied at 1.04 GeV for transferred momenta ranging from 0.11 to 0.35 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$. An exponential decrease of the cross section is observed. A Glauber-type calculation is presented. The possibility of extracting information on ${\ensuremath{\sigma}}_{\ensuremath{\Delta}N}$ and ${\ensuremath{\alpha}}_{\ensuremath{\Delta}N}$ is discussed.

The reaction $^{6}\mathrm{Li}(d, tp)^{4}\mathrm{He}$ has been studied for two values of residual $^{4}\mathrm{He}$ momentum (${\stackrel{\ensuremath{\rightarrow}}{\mathrm{k}}}_{\ensuremath{\alpha}}=0 \mathrm{and} \ensuremath{-}30$ MeV/c). The shift of the first minimum in the angular distribution of the reaction $^{6}\mathrm{Li}(d, tp)^{4}\mathrm{He}$, for fixed ${\stackrel{\ensuremath{\rightarrow}}{\mathrm{k}}}_{\ensuremath{\alpha}}$, with respect to the first minimum in the angular distribution of the reaction $d(d, t)p$, has been used to investigate the structure of the $d$ cluster in the $^{6}\mathrm{Li}$ nucleus.

Excitation functions are given for the following proton reactions on O/ sup 16/ at proton energies of 20 to 150 Mev: (p,pn)O/sup 16/. ((p 2p2n) and (p alpha ) N/sup 13/. STA(p 3p3n) and (p n alpha )!C/sup 1 and STA(p,5p5n) and (p,3p3n alpha ) and (p,pn alpha )!Be/sup 7/. The shapes and amplitudes of these excitation functions are compared with those of C/sup 12/ and F/sup 19/. (T.F.H.)

A proton beam of 155 Mev was obtained from a synchrotron. The angular correlations and energies of the resulting particles were studied. The probability density was investigated for the reactions. (R.E.U.)

Characteristics of (p,n), (p,p2n), (p, alpha ), (p,2n), (p, alpha n), (p,p alpha n), (p,4p4n), (p,pn), (p,3p4n), (p,5p5n), (p,2p3n), (p,2p4n), (p,4p5n), (p,4p6n), and (p,6p7n) are studied on the nuclei Li/sup 7/, Be/sup 9/, B/sup 10/, C/sup 12/, N/sup 11/, O/sup 16/, and F/sup 19/. (T.F.H.)

The (d,t) and (d, 3 He) cross sections, which are equal with 12 C and 14 N targets, are strongly different for 40 Ca. Tentative explanations of this effect are presented.