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