ENTRY 41530 20091208 41484153000000001 SUBENT 41530001 20091208 41484153000100001 BIB 11 92 4153000100002 TITLE The ratio of the quasi-elastic nd->p(nn) to the elastic4153000100003 np -> pn charge-exchange-process yields at the proton 4153000100004 emitting angle Thetap,lab=0 deg over 0.55-2.0-GeV 4153000100005 neutron beam energy region. Experimental results. 4153000100006 AUTHOR (V.I.Sharov,A.A.Morozov,R.A.Shindin,V.G.Antonenko, 4153000100007 S.B.Borzakov, Yu.T.Borzunov, E.V.Chernykh,V.F.Chumakov,4153000100008 S.A.Dolgii,M.Finger,M.Finger Jr,L.B.Golovanov, 4153000100009 D.K.Guriev, A.Janata,A.D.Kirillov,A.D.Kovalenko, 4153000100010 V.A.Krasnov,N.A.Kuzmin,A.K.Kurilkin,PP.K.Kurilkin, 4153000100011 A.N.Livanov,V.M.Lutsenko,P.K.Maniakov,E.A.Matyushevsky,4153000100012 G.P.Nikolaevsky,A.A.Nomofilov,Tz.Panteleev,S.M.Piyadin,4153000100013 I.L.Pisarev,Yu.P.Polunin,A.N.Prokofiev,V.Yu.Prytkov, 4153000100014 P.A.Rukoyatkin,M.Slunecka,V.Sluneckova,A.Yu.Starikov, 4153000100015 L.N.Strunov,T.A.Vasiliev,E.I.Vorobiev,I.P.Yudin, 4153000100016 I.V.Zaitsev,A.A.Zhdanov,V.N.Zhmyrov) 4153000100017 INSTITUTE (4ZZZDUB) Veksler and Baldin Lab. of High Energies: 4153000100018 V.I.Sharov,A.A.Morozov,R.A.Shindin,Yu.T.Borzunov, 4153000100019 E.V.Chernykh,V.F.Chumakov,S.A.Dolgii,L.B.Golovanov, 4153000100020 D.K.Guriev,A.D.Kirillov,A.D.Kovalenko,V.A.Krasnov, 4153000100021 A.K.Kurilkin,PP.K.Kurilkin,A.N.Livanov,P.K.Maniakov, 4153000100022 E.A.Matyushevsky,G.P.Nikolaevsky,A.A.Nomofilov, 4153000100023 S.M.Piyadin,V.Yu.Prytkov,P.A.Rukoyatkin,A.Yu.Starikov, 4153000100024 L.N.Strunov,T.A.Vasiliev,E.I.Vorobiev,I.V.Zaitsev. 4153000100025 Frank Lab. of Neutron Physics: 4153000100026 S.B.Borzakov,Tz.Panteleev. 4153000100027 Dzelepov Lab. of Nuclear Problems: 4153000100028 M.Finger,M.Finger Jr,A.Janata,I.L.Pisarev,M.Slunecka, 4153000100029 V.Sluneckova,V.N.Zhmyrov. 4153000100030 Lab. of Particle Physics: 4153000100031 N.A.Kuzmin,V.M.Lutsenko,I.P.Yudin. 4153000100032 (4RUSKUR) V.G.Antonenko,Yu.P.Polunin . 4153000100033 (3CZRCHU) M.Finger,M.Slunecka. 4153000100034 (3BULBLA) Tz.Panteleev. 4153000100035 (4RUSLIN) A.N.Prokofiev,A.A.Zhdanov. 4153000100036 REFERENCE (J,YF,72,(6),1051,200906) Main Reference. 4153000100037 (J,YF,72,(6),1065,200906) 4153000100038 Graph of data and model calculations. 4153000100039 (J,EPJ/A,39,267,2009) 4153000100040 #doi:10.1140/epja/i2008-10719-x 4153000100041 (J,PAN,72,(6),1007,200906) 4153000100042 #doi:10.1134/S1063778809060131 4153000100043 English translation of J,YF,72,1051. 4153000100044 (J,PAN,72,(6),1021,200906) 4153000100045 #doi:10.1134/S1063778809060143 4153000100046 English translation of J,YF,72,1065. 4153000100047 FACILITY (ACCEL,4ZZZDUB) Nuclotron of Veksler and Baldin Lab. 4153000100048 INC-SOURCE (D-BE) IV beam line.Average intensity of primary 4153000100049 deutron beam 2E+10 d/cycle. Cycle duration 2 sec. 4153000100050 Deutron beam was monitored by two calibratd ionization4153000100051 chambers. Four collimators determined neutron beam 4153000100052 profile size. Be target of 20 cm long, 8x8 cm**2. 4153000100053 INC-SPECT Qasi-monochromatic neutrons. 4153000100054 Loses due to beam-transport line are 4153000100055 - for deutron beam - about 20 MeV, 4153000100056 - for neutron beam - about 10 MeV. 4153000100057 Neutron energies in DATA block are given without 4153000100058 taking into account these losses. 4153000100059 Neutron beam intensity varied from 8.E+5 n/cycle at 4153000100060 Tn=0.8 GeV to 4.E+6 n/cycle at Tn=2.0 GeV. 4153000100061 DETECTOR (SCIN) Two independent neutron-beam monitors as : 4153000100062 CH2 converter 60 mm thick behind a large veto 4153000100063 scintillation counter and two scintillation counters 4153000100064 in coincidence; counters and converter of 30 mm 4153000100065 diameter. Efficiency about 2 % . 4153000100066 (SPEC,MWPC,SCIN) One analyzing dipole SP-94, 4153000100067 set of multiwire proportional chambers (PC). 4153000100068 DTS contained the internal set of 4 scintillators 4153000100069 (450x160x20 mm) for detecting charge recoils, set of 4153000100070 lead converters for gamma interactions,external set of4153000100071 20 scintillators (400x50x20 mm) for detecting the 4153000100072 converted electrons.Efficiency to detect the inelastic4153000100073 np interactions was estimated to be about 80%. 4153000100074 (IOCH) Ionization chambers for primary-deutron-beam 4153000100075 monitoring. 4153000100076 SAMPLE -Liquid H2 ( or D2) cryogenic targets into thin-wall 4153000100077 mylar container 340 mm long,70 mm diameter, cooled by 4153000100078 liquid helium. Surrounded by device DTS to detect 4153000100079 charge recoil particles and gammas. 4153000100080 Filled and emplty targets were interchanged after 3-4 4153000100081 hours. H2 target - 14.496E+23 at/cm**2, 4153000100082 D2 target - 16.892E+23 at/cm**2 . 4153000100083 -At neutron-beam energies of 0.55, 0.80, 1.40 GeV - 4153000100084 polyethylene CH2, deuterated-polyethylene CD2, carbon 4153000100085 targets: 4153000100086 CH2 CD2 C 4153000100087 Length,mm 150 150 75 4153000100088 Width,mm 50 50 50 4153000100089 Height,mm 40 40 40 4153000100090 Number of atoms, H:12.1495 D:12.490 C:6.342 4153000100091 10**23/cm**2 C:6.348 C:6.245 4153000100092 METHOD (TOF) TOF base 10.9 m. For particle identification. 4153000100093 HISTORY (20091208C) M.M. 4153000100094 ENDBIB 92 0 4153000100095 NOCOMMON 0 0 4153000100096 ENDSUBENT 95 0 4153000199999 SUBENT 41530002 20091208 41484153000200001 BIB 3 20 4153000200002 REACTION ((1-H-2(N,2N)1-H-1,,DA)/(1-H-1(N,EL)1-H-1,,DA)) 4153000200003 Ratio of quasi-elastic nd->p(nn) charge-exchange yield4153000200004 to the free elastic np->pn yield . 4153000200005 MOM - incident neutron beam linear momentum. 4153000200006 ANG - polar angle of outgoing proton. 4153000200007 EN - neutron beam kinetic energy . 4153000200008 ERR-ANALYS (ERR-T) Toal error is square root of sum of 4153000200009 (ERR-S) statistical uncertainty and 4153000200010 (ERR-SYS) systematical uncertainty 4153000200011 squared. 4153000200012 Partial systematical uncertainties 4153000200013 (error for Tn=1.4 GeV, absolute value) : 4153000200014 - Total PC efficiencies - 0.0027; 4153000200015 - Trigger PC efficiency - 0.0026; 4153000200016 - Efficiency of DTS - 0.0179; 4153000200017 - Efficiency of TOF system - 0.0034; 4153000200018 - Error im shift determination of H2 and D2 elastic 4153000200019 peak center position - 0.0177; 4153000200020 - Number of H/D nuclei in targets - 0.0014 . 4153000200021 STATUS (TABLE) Table 5 of J,YF,72,(6),1051,2009. 4153000200022 ENDBIB 20 0 4153000200023 COMMON 1 3 4153000200024 ANG 4153000200025 ADEG 4153000200026 0. 4153000200027 ENDCOMMON 3 0 4153000200028 DATA 6 7 4153000200029 EN DATA ERR-T ERR-S ERR-SYS MOM 4153000200030 GEV NO-DIM NO-DIM NO-DIM NO-DIM GEV/C 4153000200031 0.55 0.589 0.046 0.024 0.039 1.156 4153000200032 0.80 0.554 0.023 0.017 0.016 1.464 4153000200033 1.00 0.553 0.026 0.011 0.023 1.697 4153000200034 1.20 0.551 0.022 0.011 0.019 1.922 4153000200035 1.40 0.576 0.038 0.028 0.026 2.143 4153000200036 1.80 0.568 0.033 0.016 0.029 2.573 4153000200037 2.00 0.564 0.045 0.014 0.042 2.785 4153000200038 ENDDATA 9 0 4153000200039 ENDSUBENT 38 0 4153000299999 ENDENTRY 2 0 4153099999999