Polarization observables for the (polarized He-3)(polarized d,p)He-4 reaction

Abstract

It was proposed that a new experimental approach to study the high momentum component of the deuteron D-state wave function by measuring the polarization correlation coefficient, C(sub //), for the (polarized He-3)(d,p)He-4 reaction. The experiment was carried out at RIKEN (Institute of Physical and Chemical Research) Accelerator Research Facility in 1996. In this report, the experimental results and its comparison with the related experimental data are presented. The experimental results of C(sub //) was compared with PWBA (Plane-Wave Born Approximation) calculations. The large discrepancy between experiment and theory in this comparison leads to the conclusion that C(sub //) is sensitive to these reaction-mechanism effects. The individual components of C(sub //), A(sub yy), C(sub y,y) and C(sub x,x), were compared with the polarization observables for DPBS (d+p Backward Scattering) and DIB (Deuteron Inclusive Breakup). The results of these comparison suggest that the polarization observables for the (polarized He-3)(d,p)He-4 reaction are expected to give significant information on the unsolved problems encountered in the DPBS and DIB experiments.

(polarized He-3)(d,p)He-4反応における偏極相関係数C(sub //)測定による重陽子D状態波動関数の高運動量成分を研究するための新しい実験方法の提案を行った。実験は1996年にRIKEN(理化学研究所)加速器施設にて行った。ここでは、実験結果とそれに関係する実験データとの比較を報告する。偏極相関係数の実験結果はPWBA(平面波ボルン近似)計算と比較した。この比較における実験と理論の大きな矛盾から、偏極相関係数がこれらの反応機構効果に敏感であるという結論が導かれる。C(sub //)、A(sub yy)、C(sub y,y)、C(sub x,x)の個々の成分をDPBS(d+p後方散乱)とDIB(重陽子包括的崩壊)の偏極観測量と比較した。これらの比較の結果は、(polarized He-3)(d,p)He-4反応における偏極観測量がDPBS、DIB実験が直面している未解決な問題に対する重要な情報を与えることを示唆している。