Data appearing in V. Bellini et al., Nucl. Phys. A646, 55 (1999), "Coherent pi0 photo-production on 4He at Intermediate Energies with Polarized Photons", BNL-65890. ==================================================== Unpolarized cross sections: Egammma = 206 MeV theta_cm pi0 d sigma/d omega err (d sigma/ d omega) (deg) micro b /sr micro b /sr 32.5 10.3 0.5 46.6 15.6 0.8 74.8 16.2 0.6 93.1 13.9 0.4 113.3 11.9 0.4 132.9 4.5 0.2 Egammma = 219 MeV theta_cm pi0 d sigma/d omega err (d sigma/ d omega) (deg) micro b /sr micro b /sr 32.5 13.0 0.5 46.7 22.2 0.9 74.9 27.4 0.6 93.2 21.1 0.4 113.4 14.4 0.3 132.9 5.2 0.2 Egammma = 232 MeV theta_cm pi0 d sigma/d omega err (d sigma/ d omega) (deg) micro b /sr micro b /sr 32.8 22.2 0.7 46.8 25.7 0.9 75.1 31.3 0.8 93.4 23.7 0.4 113.5 12.5 0.3 132.8 5.2 0.2 Egammma = 245 MeV theta_cm pi0 d sigma/d omega err (d sigma/ d omega) (deg) micro b /sr micro b /sr 33.0 29.4 1.4 46.9 39.5 2.1 75.3 31.3 0.9 93.5 23.6 0.5 113.7 8.2 0.3 132.8 3.5 0.2 Egammma = 259 MeV theta_cm pi0 d sigma/d omega err (d sigma/ d omega) (deg) micro b /sr micro b /sr 32.9 31.7 1.4 47.0 41.3 2.2 75.3 34.6 0.9 93.4 21.2 0.5 113.5 7.4 0.3 132.9 2.2 0.2 Egammma = 274 MeV theta_cm pi0 d sigma/d omega err (d sigma/ d omega) (deg) micro b /sr micro b /sr 32.9 38.0 1.5 47.2 60.4 2.6 75.4 40.8 1.0 93.5 19.4 0.5 113.5 4.9 0.3 132.8 1.0 0.2 Egammma = 289 MeV theta_cm pi0 d sigma/d omega err (d sigma/ d omega) (deg) micro b /sr micro b /sr 33.0 47.5 1.7 47.3 56.9 2.1 75.6 36.2 0.9 93.7 12.3 0.3 113.4 3.2 0.2 132.7 1.2 0.2 Egammma = 306 MeV theta_cm pi0 d sigma/d omega err (d sigma/ d omega) (deg) micro b /sr micro b /sr 33.2 45.9 1.6 47.5 54.2 2.5 75.9 26.6 0.8 93.1 8.2 0.4 113.4 1.2 0.2 133.0 0.7 0.1 Egammma = 322 MeV theta_cm pi0 d sigma/d omega err (d sigma/ d omega) (deg) micro b /sr micro b /sr 32.9 35.9 2.4 47.4 31.9 2.9 76.0 15.4 1.1 93.8 5.4 0.5 113.7 1.2 0.3 133.0 0.7 0.1 ==================================================================== Linearly polarized photon asymmetries: Egammma = 206 MeV theta_cm pi0 Asymm err (Asymm) (deg) 32.5 -.921 .070 46.6 -.936 .061 74.8 -.975 .018 93.1 -.917 .024 113.3 -.933 .038 132.9 -.903 .054 Egammma = 219 MeV theta_cm pi0 Asymm err (Asymm) (deg) 32.5 -.948 .055 46.7 -.975 .024 74.9 -.962 .019 93.2 -.976 .009 113.4 -.961 .025 132.9 -.916 .042 Egammma = 232 MeV theta_cm pi0 Asymm err (Asymm) (deg) 32.8 -.896 .040 46.8 -.993 .018 75.1 -.976 .012 93.4 -.965 .018 113.5 -.997 .014 132.8 -.904 .041 Egammma = 245 MeV theta_cm pi0 Asymm err (Asymm) (deg) 33.0 -.965 .069 46.9 -.999 .040 75.3 -1.008 .016 93.5 -.964 .025 113.7 -1.026 .027 132.8 -.906 .095 Egammma = 259 MeV theta_cm pi0 Asymm err (Asymm) (deg) 32.9 -1.000 .032 47.0 -.995 .037 75.3 -.999 .015 93.4 -.985 .014 113.5 -1.015 .030 132.9 -.911 .128 Egammma = 274 MeV theta_cm pi0 Asymm err (Asymm) (deg) 32.9 -.968 .043 47.2 -.997 .027 75.4 -.999 .011 93.5 -.957 .024 113.5 -1.012 .041 132.8 -1.350 .3456507 Egammma = 289 MeV theta_cm pi0 Asymm err (Asymm) (deg) 32.0 -.993 .020 47.3 -.992 .022 75.6 -.986 .012 93.7 -.972 .024 113.4 -.986 .039 132.7 -.787 .116 Egammma = 306 MeV theta_cm pi0 Asymm err (Asymm) (deg) 33.2 -.996 .018 47.5 -.999 .023 75.9 -1.000 .012 93.1 -1.012 .029 113.4 -1.132 .2438293 133.0 -.970 .1863307 Egammma = 322 MeV theta_cm pi0 Asymm err (Asymm) (deg) 32.9 -.995 .032 47.4 -.909 .092 76.0 -.991 .041 93.8 -1.065 .107 113.7 -.928 .155 133.0 -.962 .133