[en] The Delta region of excitation on targets of ¹H ²H, ¹²C, ⁴⁰Ca and ²⁰⁸Pb was studied at the Neutron Time of Flight facility (NTOF) at LAMPF. These spin observables complement existing hadronic and electromagnetic reaction studies. However, (p, n) spin observables are needed to isolate the spin-longitudinal and spin-transverse response functions. Results show smaller medium modifications of the free values than were theoretically predicted. The D_LL + 2*D_v; results show that the Delta is not a pure unnatural parity excitation

[en] The experimental angular distribution for the ¹³C(p,n)¹³N reaction at 120 MeV is shown, along with results of a DWBA calculation. A sample TOF spectrum from the ²⁶Mg(p,n)²⁶Al reaction at 120 MeV is exhibited, and the relative strengths of spin-isospin and isospin terms of the effective nucleon-nucleus interaction are extracted. 0⁰ TOF spectra for ¹¹⁶Sn(p,n) and ²⁰⁸Pb(p,n) reactions are also given; concentration of strength above the IAS is noted in the former. 4 figures

[en] A sample spectrum from the reaction at 43 MeV is shown, and relative strengths are compared with those of other reactions exciting the same states. 1 figure, 1 table

No abstract available

[en] Differential cross sections, analyzing powers, and tensor analyzing powers were measured from 10⁰ to 60⁰ at 17 MeV. Results of zero- and finite-range DWBA calculations are shown. One-step DWBA and two-step CCBA calculations of angular distributions for the 512⁺ to 712⁺ doublet at 2.6 MeV in ²⁰⁷Pb were performed, and results are presented. 2 figures

[en] A study of known core-excited states in ²⁰⁷Pb shows that the cross section and analyzing power data are not well reproduced by two-step mechanisms. 3 figures

[en] Cross sections and analyzing powers were measured in the ²⁰⁶Pb(→t,p) ²⁰⁸Pb reaction leading to the 4^-, 5^- states of the (p/sub 1/2/^-1 g/sub 9/2/) doublet. Standard DWBA calculations reproduce the cross section but not the analyzing power for the 5^- state. The opposite is true for a sequential transfer (t,d) (d,p) calculation for the 4^- state. 1 figure, 1 table

[en] I review available techniques for extraction of weak interaction rates in nuclei. The case for using hadron charge exchange reactions to estimate such rates is presented and contrasted with alternate methods. Limitations of the (p,n) reaction as a probe of Gamow-Teller strength are considered. Review of recent comparisons between beta-decay studies and (p,n) is made, leading to cautious optimism regarding the final usefulness of (p,n)- derived GT strengths to the field of astrophysics. copyright 1995 American Institute of Physics

[en] Low-lying levels of ₈₆Y have been investigated using the ₈₆Sr(₃He, t) reaction at 42.8 MeV. Jsup(π) values or limits were assigned to 20 of the 23 levels observed below 1.5 MeV through the use of collective DWBA calculations or experimental (₃He, t) reaction systematics. The particle-hole structure of ₈₆Y is discussed on the basis of these data and the shell model. (orig.)

[en] The (p,n) reaction at intermediate energies provides a direct determination of nuclear weak-interaction matrix elements which are often unobtainable from decay studies. Calibration of this strong-interaction probe for quantitative measure of such matrix elements has been based primarily on study of the well-known Fermi and GT transitions in the ¹⁴C(p,n)¹⁴N reaction. The energy dependence of the ratio of the strengths of the isovector spinflip and non-spinflip central components of the effective nucleon-nucleon interaction using this reaction has been extended to higher energies than previously investigated using the recently commissioned 600 meter neutron flight path at the NTOF facility of LAMPF. This study will further improve our understanding of the (p,n) reaction as a probe of matrix elements related to beta decay