R. D. Ransome

Measurement of the p-C analyzing power between 100 and 750 MeV and the p-Be analyzing power at 780 MeV

Abstract The inclusive p-C analyzing power has been measured for laboratory scattering angles between 4° and 25°, for energies between 100 and 750 MeV. The inclusive p-Be analyzing power has been measured at 780 MeV between 4° and 28°. The experiment was performed at LAMPF using a large solid angle polarimeter. An energy dependent empirical fit to these data as well as to data from SIN and TRIUMF is presented. The data from all three facilities are in generally good agreement.

A polarimeter for protons between 100 and 800 MeV

Abstract A carbon polarimeter has been built and used for protons with energies between 100 and 800 MeV. The polarimeter accepts scatters in the carbon analyzer up to 30° lab , with negligible instrumental asymmetries. Drift chambers 60 cm square were used with a system for resolving the left-right ambiguity inherent in drift chambers. A hardware system for rejecting small angle scatters is described. The polarimeter is routinely used to measure spin transfer parameters with a typical precision of ±0.03 in about eight hours of low-duty LAMPF beam.

The measurement of KNN and KLL in at 800 MeV

Abstract The spin-transfer parameters K NN and K LL have been measured for at 0° and 800 MeV for neutron momenta between 700 and 1200 MeV c . Peak values of K NN and K LL are −0.30 ± 0.05 and −0.5 ± 0.1 respectively. These results are in substantial disagreement with VerWests field theoretic model.

Some proton spin observables obtained in p-d elastic scattering at 500 and 800 MeV

Abstract Measurements of the spin transfer observables D NN , D SS , and D LS in p + d → p + d at 500 and 800 MeV are reported. In addition we have measured the polarization, P , and the asymmetry A y . The data were taken in the range 0.2 t c ) 2 . Comparison of the observables is made with the predictions of a relativistic multiple scattering model employing the results of a recent phase shift analysis of NN scattering data.

QPAN — A quick polarization analyzer for neutrons☆

A device, dubbed QPAN, for determining the polarization of an intermediate energy neutron beam has been developed. QPAN consists of a double arm scintillator range telescope viewing a CH2 target. The effective analyzing power was measured to be 0.18 ± 0.01.

The energy dependence of the 90° pp elastic scattering depolarization parameter and amplitudes between 0.9 and 1.5 GeV/c☆

Abstract The depolarization parameter D NN for pp elastic scattering at θ cm = 90 ° has been measured at twelve momenta between 0.9 and 1.5 GeV/ c . The moduli of the three transversity amplitudes T 1 , T 3 , and T 4 have been extracted from these data and from previous measurements of the differential cross section and spin correlation parameter A NN (90 °). Smooth energy dependence is found for all three amplitude moduli.

Measurement of KNN, KSS, KSL, and KLL in n↘p → p↘n at 800 MeV in the CEX region

The spin transfer parameters1 KNN, KSS, and KLL have been measured for np elastic scattering at 800 MeV between 165° and 180° c.m. The parameters KNN and KLL are in good agreement with the quasi‐free reaction p↘d → n↘pp at 180°.2

The measurement of KNN and KLL in p↘p → n↘X at 800 MeV

The spin transfer parameters, KNN and KLL have been measured in p↘p → n↘X at 0° and 800 MeV for neutron momenta between 700 and 1200 MeV/c. Peak values of KNN and KLL are −.3±.05 and −.5±.1 respectively.

Measurement of DNN, DSS, DLS in pp → pp at 800 MeV

The spin transfer parameters DNN, DSS, DLS have been measured for pp elastic scattering at 800 MeV between 20° and 135° cm. These data bring the number of parameters measured at this energy to a total of 10, which is in general sufficient to determine a set of I=1 amplitudes.

The measurement of Ann for free n‐p scattering for neutron energies 300–665 MeV

The spin correlation parameter Ann for free n‐p scattering has been measured for 300–665 MeV over an angular range 70°–166° cm. This is the first Ann measurement in this energy region. The results are compared with predictions from the existing nucleon‐nucleon phase shift solutions.