Measurement of the cross sections and the vector and tensor analyzing powers for d-p elastic scattering at E(sub d) = 270 MeV

Abstract

In regard to the cross section and the vector and tensor analyzing powers Ay, Ayy, Axx, Axz for the deuteron-proton (d-p) elastic scattering at 270 MeV, measurement values were compared with ones reported by Sakamoto et al and the theoretical predictions of the three body Faddeev calculation. The measurement was conducted for the forward angles 10 deg - 60 deg and for the backward angles 125 deg - 180 deg. The polyethylene target with a thickness of 46.7 mg/sq cm was bombarded by a polarized deuteron beam and either scattered deuterons or protons were detected by the spectrograph SMART depending on the scattering angle. As the results, the two independent measurements provide almost the same values in the overlapping region, and are also good agreement with the calculations for the tensor analyzing power Ay if the effect of three nucleon force is taken into account in the calculations. However, the agreements in the tensor analyzing powers Ayy and Axx are rather poor.

270MeVでの重陽子-陽子(d-p)弾性散乱に対する断面積およびベクトルとテンソル偏極解析能に関して、本測定値を坂本らによって報告された値および3体ファデーエフ計算による理論予測と比較した。測定は前進角10度?60度および後退角125度?180度に対して行った。46.7mg/平方センチメートル厚みのポリエチレン標的を偏極重陽子ビームで衝撃し、散乱重陽子や陽子を散乱角度を変えながら分光写真器SMARTで検出した。その結果、別個の2つの測定値は共通の範囲でほぼ同じ値を示し、またテンソル偏極解析能Ayに対しては3つの核子力の効果を考慮した計算値とよく一致した。しかし、テンソル偏極解析能AyyとAxxにおいては計算結果との一致はやや劣っていた。