ENTRY M0546 20081110 M047M054600000001 SUBENT M0546001 20081110 M047M054600100001 BIB 13 40 M054600100002 INSTITUTE (2FR SAC,2ITYPAV,2GERMNZ,2GERTUE,4RUSJIA,2GERGOE) M054600100003 REFERENCE (J,PR/C,55,1033,199703) M054600100004 AUTHOR (M.MACCORMICK,J.HABERMANN,J.AHRENS,G.AUDIT,R.BECK, M054600100005 A.BRAGHIERI,G.GALLER,N.D'HOSE,V.ISBERT,P.PEDRONI, M054600100006 T.PINELLI,G.TAMAS,S.WARTENBERG,A.ZABRODIN) M054600100007 TITLE Total photoabsorption cross section for 4He from M054600100008 200 to 800 MeV. M054600100009 FACILITY (MICRT,2GERMNZ) M054600100010 INC-SOURCE (TAGD) Glasgow tagged photon facility at the MAMI M054600100011 continuous wave accelerator of Mainz. M054600100012 SAMPLE The liquid 4he target at 4.25 k and 1050 mbar M054600100013 contained in a mylar cylinder of dimensions 4.3 cm M054600100014 in diameter by 27.5 cm in length. M054600100015 DETECTOR (TELES,MWPC,SCIN) 3.7 PI acceptance detector M054600100016 DAPHNE: a central tracking detector, consisting of M054600100017 three coaxial cylindrical multiwire proportional M054600100018 chambers, surrounded by a segmented cylindrical M054600100019 scintillator ede telescope for charged particle M054600100020 identification and a scintillator-absorber M054600100021 sandwich. M054600100022 METHOD (COINC,EDE) M054600100023 ERR-ANALYS (ERR-S) Statistical errors. M054600100024 (ERR-1) Systematic errors. M054600100025 COMMENT The total photoabsorption cross section for 4He M054600100026 has been measured for the first time over a wide M054600100027 photon energy range (200 - 800 MeV). By using the M054600100028 large acceptance detector DAPHNE at the tagged M054600100029 photon facility of the mami microtron in Mianz M054600100030 high precision results with small systematic M054600100031 errors were obtained. This measurement shows that M054600100032 4He has a behavior similar to heavy nuclei and, M054600100033 in particular, a reduction of the cross section M054600100034 with respect to the lighter nuclei is found for M054600100035 Eg > 600 MeV. M054600100036 STATUS (TABLE) Data from the Table 1. M054600100037 Data were compiled at the USA BNL NNDC by M054600100038 V.V.Varlamov. M054600100039 HISTORY (19990226C) M054600100040 (20081110A) Corrected by V.Varlamov: ENTRY N2 M054600100041 shifted, lowercase. M054600100042 ENDBIB 40 0 M054600100043 NOCOMMON 0 0 M054600100044 ENDSUBENT 43 0 M054600199999 SUBENT M0546002 19990226 0000M054600200001 BIB 1 1 M054600200002 REACTION (2-HE-4(G,ABS),,SIG) M054600200003 ENDBIB 1 0 M054600200004 NOCOMMON 0 0 M054600200005 DATA 4 56 M054600200006 EN DATA ERR-S ERR-1 M054600200007 MEV MICRO-B MICRO-B MICRO-B M054600200008 204. 722. 2. 23. M054600200009 216. 879. 3. 25. M054600200010 228. 1010. 3. 27. M054600200011 240. 1139. 3. 30. M054600200012 252. 1263. 3. 32. M054600200013 264. 1374. 4. 35. M054600200014 276. 1461. 4. 37. M054600200015 288. 1543. 4. 39. M054600200016 300. 1583. 4. 40. M054600200017 312. 1620. 4. 41. M054600200018 324. 1610. 4. 41. M054600200019 336. 1610. 4. 41. M054600200020 348. 1563. 4. 39. M054600200021 360. 1521. 4. 38. M054600200022 371. 1462. 4. 37. M054600200023 383. 1410. 4. 36. M054600200024 407. 1269. 4. 32. M054600200025 419. 1194. 4. 31. M054600200026 430. 1154. 4. 30. M054600200027 442. 1095. 4. 28. M054600200028 453. 1064. 4. 28. M054600200029 465. 1013. 4. 27. M054600200030 476. 995. 4. 26. M054600200031 488. 950. 4. 25. M054600200032 499. 949. 4. 25. M054600200033 510. 920. 4. 25. M054600200034 521. 905. 4. 25. M054600200035 532. 901. 4. 25. M054600200036 543. 897. 5. 25. M054600200037 554. 865. 4. 24. M054600200038 564. 862. 5. 25. M054600200039 575. 852. 5. 24. M054600200040 585. 847. 5. 25. M054600200041 595. 870. 5. 25. M054600200042 605. 855. 5. 25. M054600200043 615. 839. 5. 25. M054600200044 625. 859. 5. 26. M054600200045 635. 855. 5. 26. M054600200046 644. 851. 5. 26. M054600200047 654. 842. 5. 26. M054600200048 663. 836. 5. 26. M054600200049 672. 831. 5. 26. M054600200050 681. 839. 5. 26. M054600200051 690. 834. 5. 26. M054600200052 699. 823. 5. 26. M054600200053 707. 814. 5. 26. M054600200054 715. 824. 5. 27. M054600200055 723. 823. 5. 27. M054600200056 731. 814. 5. 27. M054600200057 739. 795. 5. 26. M054600200058 747. 789. 5. 26. M054600200059 756. 775. 5. 26. M054600200060 765. 778. 5. 26. M054600200061 774. 737. 5. 25. M054600200062 782. 751. 5. 25. M054600200063 789. 756. 6. 25. M054600200064 ENDDATA 58 0 M054600200065 ENDSUBENT 64 0 M054600299999 ENDENTRY 2 0 M054699999999