M. Carchidi

Systematics of pion double-charge-exchange reactions on T = 0 nuclei

Abstract Pion induced double charge exchange on 12 C, 16 O, 24 Mg, 28 Si, 32 S, and 40 Ca exhibits forward-angle cross sections that vary rapidly with pion energy and fall off roughly as A −4 3 . Angular distributions at 164 MeV appear diffractive for targets of 12 C, 16 O, and 40 Ca.

Proton occupation numbers in Ge isotopes

Abstract Wave functions for ground states in Ge isotopes, derived solely from fits to 2n transfer data, give a good account of the jump in proton occupation numbers between 72Ge and 74Ge, and determine the proton occupation numbers of the basic states.

Resonances in C13(13C,)22Ne

Complete angular distributions (theta/sub c.m./ = 9/sup 0/--90/sup 0/) for the reaction /sup 13/C( /sup 13/C,..cap alpha..) /sup 22/ Ne in the energy range E/sub c.m./ = 6.25--13.38 MeV have been measured. The data exhibit significant resonancelike behavior and a portion of it has been fitted to extract the amplitudes and phases of the relevant l values with two methods. The first uses a least-squares procedure to fit the angular distributions to a linear sum of Legendre polynomials while the second makes a grid search to find a best fit to an amplitude squared equation.

Resonances inC13(13C,α)22Ne

Complete angular distributions (theta/sub c.m./ = 9/sup 0/--90/sup 0/) for the reaction /sup 13/C( /sup 13/C,..cap alpha..) /sup 22/ Ne in the energy range E/sub c.m./ = 6.25--13.38 MeV have been measured. The data exhibit significant resonancelike behavior and a portion of it has been fitted to extract the amplitudes and phases of the relevant l values with two methods. The first uses a least-squares procedure to fit the angular distributions to a linear sum of Legendre polynomials while the second makes a grid search to find a best fit to an amplitude squared equation.

Resonances in /sup 13/C(/sup 13/C,. cap alpha. )/sup 22/Ne

Complete angular distributions (theta/sub c.m./ = 9/sup 0/--90/sup 0/) for the reaction /sup 13/C( /sup 13/C,..cap alpha..) /sup 22/ Ne in the energy range E/sub c.m./ = 6.25--13.38 MeV have been measured. The data exhibit significant resonancelike behavior and a portion of it has been fitted to extract the amplitudes and phases of the relevant l values with two methods. The first uses a least-squares procedure to fit the angular distributions to a linear sum of Legendre polynomials while the second makes a grid search to find a best fit to an amplitude squared equation.

Dominance of l = 10 in /sup 12/C(/sup 12/C,. cap alpha. ) /sup 20/Ne(g. s. ) at E/sub c. m. / = 13--15 MeV

In the c.m. energy region 13--15 MeV, the l = 10 partial wave dominates the cross section for /sup 12/C(/sup 12/C, ..cap alpha..) /sup 20/Ne(g.s.), frequently contributing more than 90% of the total cross section.

Dominance of l=10 in C12(C12,)Ne (g.s.)20 at Ec.m.=13-15 MeV

In the c.m. energy region 13--15 MeV, the l = 10 partial wave dominates the cross section for /sup 12/C(/sup 12/C, ..cap alpha..) /sup 20/Ne(g.s.), frequently contributing more than 90% of the total cross section.

l determinations for 12C + 12C☆

Abstract Detailed angular-distribution measurements and Legendre-polynomial fits for 12 C ( 12 C , α 0 ) 20 Ne ( g.s ) in the bombardi energy region of the so-called “12 + ” bump in 12 C + 12 C inelastic scattering show conclusively that l = 10 dominates the α 0 exit channel throughout the range, except near the narrow 12 + resonance that was previously known.