28711931
Cross section and transverse polarization transfer for the 2H(p,n)2p reaction at 160 MeV.
The cross section and transverse polarization transfer for the $^{2}\mathrm{H}$(p,n)2p reaction at ${E}_{\mathrm{p}=160}$ MeV and theta=0\ifmmode^\circ\else\textdegree\fi{} have been measured with good energy resolution (1 MeV). An asymmetric peak shape characteristic of the $^{1}\mathrm{S}_{0}$ final-state interaction of the residual two-proton system has been clearly observed. The measured transverse polarization transfer coefficient for this peak is ${D}_{\mathrm{NN}}$(0?(de)=-0.43\ifmmode\pm\else\textpm\fi{}0.04. A simple impulse approximation calculation including the $^{1}\mathrm{S}_{0}$ final-state interaction reproduces the main features of the observed peak shape and polarization transfer. Small discrepancies observed in the peak tail region can be accounted for by including the $^{3}\mathrm{P}_{0}$,1,2 final state interaction.
120921557
Gamow-Teller strength distribution in 81Kr and the consequences for a 81Br solar neutrino detector
Abstract Neutron time-of-flight measurements have been performed on the 81 Br(p,n) 81 Kr reaction at E p = 190 and 200 MeV. Gamow-Teller transition strengths have been deduced for final 81 Kr states accessible through solar neutrino capture on 81 Br. For the standard solar model, 81 Br is most sensitive to 8 B neutrinos, not — as previously believed — 7 Be neutrinos.
8485111
Direct evidence for the breakdown of the N = 8 shell closure in 12Be
Partial cross sections and corresponding momentum distributions have been studied in the one-neutron knockout reaction ( 12Be,11Be+gamma) on a 9Be target at 78 MeV/nucleon. The resulting spectroscopic factors for the only two bound states of 11Be are 0.42+/-0.06 ( 1/2(+)) and 0.37+/-0.06 ( 1/2(-)), where the errors are experimental only. This result shows that N = 8 is not a good closed shell in the neutron-rich 12Be and that the last neutron pair is two-thirds in the ( 1s(2)+0d(2)) intruder configuration.