Wesley Scott Wilburn

Test of parity-conserving time-reversal invariance using polarized neutrons and nuclear spin aligned holmium.

A test of parity-conserving, time-reversal noninvariance (PC TRNI) has been performed in 5.9 MeV polarized neutron transmission through nuclear spin aligned holmium. The experiment searches for the T-violating fivefold correlation via a double modulation technique{emdash}flipping the neutron spin while rotating the alignment axis of the holmium. Relative cross sections for spin-up and spin-down neutrons are found to be equal to within 1.2{times}10{sup {minus}5} (80{percent} confidence). This is a two orders of magnitude improvement compared to traditional detailed balance studies of time reversal, and represents the most precise test of PC TRNI in a dynamical process, to our knowledge. {copyright} {ital 1997} {ital The American Physical Society}

A new atomic beam polarized ion source for the Triangle Universities Nuclear Laboratory: overview, operating experience, and performance

Abstract A newly constructed source of polarized H ± and D ± ions is described. Atomic H or D beams from a dissociator with a cooled nozzle enter a system of two sextupole magnets and several radio-frequency transitions where they are focused and polarized. They enter a downstream electron-cyclotron-resonance-heated plasma ionizer from which positive ions are extracted. When negative ions are desired, they may be produced from the positive beam by charge-exchange in cesium vapor. Emerging beams are intense, have good polarization, low energy spread, and good optical quality. Descriptions are included for all major systems and for diagnostic procedures used to optimize both the intensity and the polarization of the output H ± or D ± beams obtained. Typical operating experience, performance figures, and a description of routine maintenance procedures are given.

Measurements of the total cross section for the scattering of polarized neutrons from polarized {sup 3}He

Measurements of polarized-neutron--polarized

3He melting curve thermometry in a nuclear polarization experiment

{\mathrm{\ensuremath{-}}}^{3}

The scattering of polarized neutrons from statically polarized solid 3He

He scattering are reported. The target consisted of cryogenically polarized solid

Measurements at Low Energies of the Polarization-Transfer Coefficient

^{3}\mathrm{He}

Determination of the concentration of SF6 in an accelerator gas mixture by measuring the velocity of sound

, with thickness 0.04 atom/b and polarization \ensuremath{\sim}0.4. Polarized neutrons were produced via the

An experimental test of parity‐even time reversal invariance with MeV neutrons

^{3}\mathrm{H}

A polarized solid 3He target for neutron transmission experiments

(p\ensuremath{\rightarrow},n\ensuremath{\rightarrow}

Testing P‐even time reversal invariance with MeV neutrons

{)}^{3}