T. S. Bhatia

The measurement of KNN,KLLINpd →nX and p9Be→nX at 800 MeV☆

Abstract The polarization transfer parameters,KNN and KLL, have been measured in p d→ n X and p 9Be→ n X at 0° and 800 MeV. The quasifree p d→ n X values for KNN and KLL are close to the free n-p measured values. The rather large values of KLL demonstrate that this transfer mechanism will provide a useful source of polarized neutrons at medium energies.

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.

Measurement of KLL and KNN in pd → npp at 500, 650 and 800 MeV

Abstract Measurements of the spin transfer parameters, KNN and KLL, at 500, 650 and 800 MeV are presented for the reaction p d → n pp at 0°. The data are useful input to the NN data base and indicate that the quasi-free charge exchange (CEX) reaction us a useful mechanism for producing neutrons with at least 40% polarization at energies as low as 500 MeV.

Measurement of Ann, Ano, and Aon for the Reaction Pp-]D-Pi+ in the Energy Region 500-800 Mev

Angular distributions of the spin observables A/sub n//sub n/, A/sub n//sub o/, and A/sub o//sub n/ for the reaction pp..-->..d..pi../sup +/ have been measured for pion c.m. angles 30/sup 0/

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.

Measurements of Spin-Correlation Parameters all and Asl for P-]P-]-]Pid between 500 and 800 Mev

Measurements of A/sub L/L between 500 and 800 MeV and spin dependent cross sections derived from these measurements are presented for the reaction pp..--> pi..d at c.m. angles theta/sub ..pi../( of 50/sup 0/, 70/sup 0/, and 90/sup 0/. Angular distributions for A/sub S/L are also presented for energies 500, 650, and 800 MeV. These are the first measurements of spin-correlation parameters in this channel above 590 MeV, and are in substantial disagreement with theoretical predictions of the triplet amplitudes above 600 MeV.

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.

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.

A measurement of the analyzing power for n‐p elastic scattering at 800 MeV for θc.m.≳100°*

The analyzing power for n‐p elastic scattering has been measured using an 800 MeV polarized neutron beam. The measurements extend in the backward scattering region from 100 to 178 degrees.