ENTRY M0520 20160205 M082M052000000001 SUBENT M0520001 20160205 M082M052000100001 BIB 13 44 M052000100002 TITLE Total photoabsorption cross sections for He-4 from M052000100003 200 to 800 MeV. M052000100004 AUTHOR (M.Maccormick,J.Habermann,J.Ahrens,G.Audit,R.Beck, M052000100005 A.Braghieri,G.Galler,N.D'hose,V.Isbert,P.Pedroni, M052000100006 T.Pinelli,G.Tamas,S.Wartenberg,A.Zabrodin) M052000100007 INSTITUTE (2GERMNZ,2ITYPAV,2FR SAC,4RUSJIA) M052000100008 REFERENCE (J,PR/C,55,1033,1997) M052000100009 INC-SOURCE (QMPH,TAGD) electron tagged bremsstrahlung: Glasgow M052000100010 tagged photon spectrometer installed at the MAMI in M052000100011 Mainz. M052000100012 FACILITY (MICRT,2GERMNZ) MAMI Mainz racetrack microtron. M052000100013 SAMPLE The liquid He-4 target at 4.25 K and 1050 mbar was M052000100014 contained in mylar cylinder of dimensions 4.3 cm in M052000100015 diameter by 27.5 cm in length. M052000100016 METHOD (EXTB,SITA) M052000100017 DETECTOR (SCIN,MWPC,TELES) The large acceptance detector M052000100018 DAPHNE, developed by INFN, Italy and CEA-SPHN, M052000100019 saclay, france has a central tracking detector, M052000100020 consisting of three coaxial cylindrical multiwire M052000100021 proportional chambers, surrounded by a segmented M052000100022 cylindrical scintillator E-dE telescope. The angular M052000100023 polar acceptance was from 22 to 158 degree and M052000100024 azimuthal acceptance was from 0 to 360 degree. M052000100025 ANALYSIS Total photoabsorption cross sections was directly M052000100026 accessed by measuring the number of events with M052000100027 charged particles in the final state. About 80 % of M052000100028 the remaining part was deduced fron the measured M052000100029 number of pi-0 events with no accompanying charged M052000100030 particles by using the calculated pi-0 detection M052000100031 efficiency. Finally, the last contribution was M052000100032 evaluated by extrapolation both of the charged pion M052000100033 photoproduction and photodisintegration channels. M052000100034 ERR-ANALYS (ERR-S) Statistical errors. M052000100035 (ERR-1) Systematic errors. M052000100036 COMMENT The total photoabsorption cross sections for He-4 has M052000100037 been measured for the first time over a wide photon M052000100038 energy range from 200 to 800 MeV. By using the large M052000100039 acceptance detector DAPHNE at the tagged photon M052000100040 facility of MAMI accelerator in Mainz high precision M052000100041 results with small systematic errors were obtained. M052000100042 HISTORY (19980212C) Data were compiled at the MSU SINP CDFE M052000100043 by V.Varlamov. M052000100044 (20160205A) Corected by V.Varlamov: dates, lovercase, M052000100045 ERR-ANALYS, STATUS. M052000100046 ENDBIB 44 0 M052000100047 COMMON 1 3 M052000100048 EN-RSL M052000100049 PER-CENT M052000100050 .25 M052000100051 ENDCOMMON 3 0 M052000100052 ENDSUBENT 51 0 M052000199999 SUBENT M0520002 20160205 M082M052000200001 BIB 3 4 M052000200002 REACTION (2-HE-4(G,ABS),,SIG) M052000200003 STATUS (TABLE) Data from the Table I. M052000200004 HISTORY (20160205A) Corected by V.Varlamov: STATUS, M052000200005 ERR-S. M052000200006 ENDBIB 4 0 M052000200007 NOCOMMON 0 0 M052000200008 DATA 4 57 M052000200009 EN DATA ERR-S ERR-1 M052000200010 MEV MICRO-B MICRO-B MICRO-B M052000200011 204. 722. 2. 23. M052000200012 216. 879. 3. 25. M052000200013 228. 1010. 3. 27. M052000200014 240. 1139. 3. 30. M052000200015 252. 1263. 3. 32. M052000200016 264. 1374. 4. 35. M052000200017 276. 1461. 4. 37. M052000200018 288. 1543. 4. 39. M052000200019 300. 1583. 4. 40. M052000200020 312. 1620. 4. 41. M052000200021 324. 1610. 4. 41. M052000200022 336. 1610. 4. 41. M052000200023 348. 1563. 4. 39. M052000200024 360. 1521. 4. 38. M052000200025 371. 1462. 4. 37. M052000200026 383. 1410. 4. 36. M052000200027 395. 1332. 4. 34. M052000200028 407. 1269. 4. 32. M052000200029 419. 1194. 4. 31. M052000200030 430. 1154. 4. 30. M052000200031 442. 1095. 4. 28. M052000200032 453. 1064. 4. 28. M052000200033 465. 1013. 4. 27. M052000200034 476. 995. 4. 26. M052000200035 488. 950. 4. 25. M052000200036 499. 949. 4. 25. M052000200037 510. 920. 4. 25. M052000200038 521. 905. 4. 25. M052000200039 532. 901. 4. 25. M052000200040 543. 897. 5. 25. M052000200041 554. 865. 4. 24. M052000200042 564. 862. 5. 25. M052000200043 575. 852. 5. 24. M052000200044 585. 847. 5. 25. M052000200045 595. 870. 5. 25. M052000200046 605. 855. 5. 25. M052000200047 615. 839. 5. 25. M052000200048 625. 859. 5. 26. M052000200049 635. 855. 5. 26. M052000200050 644. 851. 5. 26. M052000200051 654. 842. 5. 26. M052000200052 663. 836. 5. 26. M052000200053 672. 831. 5. 26. M052000200054 681. 839. 5. 26. M052000200055 690. 834. 5. 26. M052000200056 699. 823. 5. 26. M052000200057 707. 814. 5. 26. M052000200058 715. 824. 5. 27. M052000200059 724. 823. 5. 27. M052000200060 732. 814. 5. 27. M052000200061 739. 795. 5. 26. M052000200062 748. 789. 5. 26. M052000200063 756. 775. 5. 26. M052000200064 765. 778. 5. 26. M052000200065 774. 737. 5. 25. M052000200066 782. 751. 5. 25. M052000200067 789. 756. 6. 25. M052000200068 ENDDATA 59 0 M052000200069 ENDSUBENT 68 0 M052000299999 ENDENTRY 2 0 M052099999999