ENTRY M0751 20220816 M120M075100000001 SUBENT M0751001 20220816 M120M075100100001 BIB 13 42 M075100100002 TITLE Coherent PI-0 photo-production on 4He at intermediate M075100100003 energies with polarized photons. M075100100004 AUTHOR (V.Bellini,M.Capogni,A.Caracappa,L.Casano, M075100100005 A.D'Angelo,F.Ghio,B.Girolami,S.Hoblit,L.Hu, M075100100006 M.Khandaker,O.C.Kistner,L.Miceli,D.Moricciani, M075100100007 A.M.Sandorfi,C.Schaerf,M.L.Sperduto,C.E.Thorn) M075100100008 REFERENCE (J,NP/A,646,55,1999) M075100100009 INSTITUTE (2ITYCAT,2ITYLNS,2ITYCAS,2ITYROM,1USABNL,1USAVIP, M075100100010 2ITYUTV,2ITYISR) M075100100011 INC-SOURCE (LCS) Laser-Compton Scattering monoenergetic linearly M075100100012 polarized photons. M075100100013 FACILITY (ESTRG,1USABNL) USA BNL National Synchrotron Light M075100100014 Source (NSLS) Laser Electron Gamma Source (LEGS). M075100100015 SAMPLE Nickel cylinder, closed on both sides by two M075100100016 hemispheres, with a total length l = 10 cm and a M075100100017 diameter of 5 cm filled with liquid 4He at a M075100100018 temperature of 3.9 K and a pressure slightly above 1 M075100100019 atmosphere. M075100100020 DETECTOR (COIN,SCIN,SCIN) The high resolution, cylindrical M075100100021 NaI(Tl) scintillator 48 cm diameter by 48 cm deep M075100100022 for the higher energy photon from PI0 decay M075100100023 detection and 8 NaI(Tl) bars 10 x 10 x 35 cm**3 M075100100024 placed around the detector for the lower energy M075100100025 photon from the PI0 decay detection. M075100100026 METHOD (EXTB,SITA,TOF) M075100100027 ANALYSIS Unpolarized reaction cross section measurements: a M075100100028 recorded event contained the amplitudes and time of M075100100029 flight of the pulses in 48 cm NAI, its M075100100030 anticoincidence shield, the bars of 8 NAI and the M075100100031 TOF of all tagging counters. M075100100032 ERR-ANALYS (ERR-S) Statistical errors. M075100100033 (ERR-SYS) Total quadrature sum - 3.1 %: M075100100034 - PI0 detection efficiency (2.5 %); M075100100035 - Compton rejection (1.0 %); M075100100036 - target density (0.7 %); M075100100037 - flux normalization (2.0 %). M075100100038 CORRECTION The data have been corrected for accidental M075100100039 coincidences (between the 48 cm NAI and the tagger), M075100100040 empty target background and cosmic rays. M075100100041 HISTORY (20080811C) M075100100042 (20220816U) Corrected by VV and SD: INSTITUTE codes M075100100043 added, STATUS. M075100100044 ENDBIB 42 0 M075100100045 COMMON 1 3 M075100100046 ERR-SYS M075100100047 PER-CENT M075100100048 3.1 M075100100049 ENDCOMMON 3 0 M075100100050 ENDSUBENT 49 0 M075100199999 SUBENT M0751002 20220816 M120M075100200001 BIB 3 4 M075100200002 REACTION (2-HE-4(G,PI0)2-HE-4,,DA) M075100200003 STATUS (TABLE) Data from the Table 1 of M075100200004 Nucl.Phys.,A646(1999)55. M075100200005 HISTORY (20220816U) Corrected by VV and SD: STATUS. M075100200006 ENDBIB 4 0 M075100200007 NOCOMMON 0 0 M075100200008 DATA 4 54 M075100200009 EN ANG DATA ERR-S M075100200010 MEV ADEG MU-B/SR MU-B/SR M075100200011 206. 31. 10.28 .47 M075100200012 206. 45. 15.62 .79 M075100200013 206. 72.5 16.21 .59 M075100200014 206. 90. 13.94 .036 M075100200015 206. 110. 11.89 .42 M075100200016 206. 130. 4.53 .17 M075100200017 219. 31. 13.04 .55 M075100200018 219. 45. 22.20 .86 M075100200019 219. 72.5 27.45 .60 M075100200020 219. 90. 21.15 .38 M075100200021 219. 110. 14.39 .33 M075100200022 219. 130. 5.23 .16 M075100200023 232. 31. 22.24 .70 M075100200024 232. 45. 25.74 .88 M075100200025 232. 72.5 31.29 .80 M075100200026 232. 90. 23.66 .44 M075100200027 232. 110. 12.49 .31 M075100200028 232. 130. 5.20 .17 M075100200029 245. 31. 29.37 1.40 M075100200030 245. 45. 39.53 2.08 M075100200031 245. 72.5 31.32 .85 M075100200032 245. 90. 23.58 .52 M075100200033 245. 110. 8.16 .29 M075100200034 245. 130. 3.51 .23 M075100200035 259. 31. 31.07 1.39 M075100200036 259. 45. 41.27 2.22 M075100200037 259. 72.5 34.56 .90 M075100200038 259. 90. 21.20 .52 M075100200039 259. 110. 7.38 .30 M075100200040 259. 130. 2.25 .17 M075100200041 274. 31. 38.04 1.49 M075100200042 274. 45. 60.38 2.61 M075100200043 274. 72.5 40.83 1.03 M075100200044 274. 90. 19.42 .49 M075100200045 274. 110. 1.23 .22 M075100200046 274. 130. .97 .16 M075100200047 289. 31. 47.45 1.65 M075100200048 289. 45. 56.87 2.08 M075100200049 289. 72.5 36.20 .95 M075100200050 289. 90. 12.33 .35 M075100200051 289. 110. 4.87 .26 M075100200052 289. 130. 1.18 .15 M075100200053 306. 31. 45.91 1.56 M075100200054 306. 45. 54.24 2.49 M075100200055 306. 72.5 26.57 .82 M075100200056 306. 90. 8.16 .41 M075100200057 306. 110. 3.19 .19 M075100200058 306. 130. .65 .07 M075100200059 322. 31. 35.94 2.42 M075100200060 322. 45. 31.94 2.86 M075100200061 322. 72.5 15.38 1.05 M075100200062 322. 90. 5.39 .48 M075100200063 322. 110. 1.19 .29 M075100200064 322. 130. .68 .11 M075100200065 ENDDATA 56 0 M075100200066 ENDSUBENT 65 0 M075100299999 ENDENTRY 2 0 M075199999999