ENTRY M0553 20190524 M100M055300000001
SUBENT M0553001 20190524 M100M055300100001
BIB 12 70 M055300100002
TITLE Two-body disintegration of the deuteron with M055300100003
0.8 - 1.8 GeV photons. M055300100004
AUTHOR (S.J.Freedman,D.F.Geesaman,R.Gilman,M.C.Green, M055300100005
R.J.Holt,H.E.Jackson,E.R.Kinney,R.Kowalczyk, M055300100006
C.Marchand,J.Napolitano,J.Nelson,D.H.Potterveld, M055300100007
B.Zeidman,R.E.Segel,T.-Y.Tung,D.Beck,G.Boyd, M055300100008
D.Collins,B.W.Filippone,C.E.Jones,J.Jourdan, M055300100009
R.D.McKeown,R.Milner,R.Walker,P.E.Bosted, M055300100010
Z.-E.Meziani,R.Minehart) M055300100011
REFERENCE (J,PR/C,48,1864,1993) M055300100012
INSTITUTE (1USAANL,1USANWU,1USAAMW,1USASTF,1USAVIR,1USACAL) M055300100013
FACILITY (LINAC,1USASTF) SLAC-NPAS facility. M055300100014
INC-SOURCE (BRST,KINDT) M055300100015
METHOD (MAGFR) Particles from the target were momentum M055300100016
analyzed and identified using SLAC 1.6 GeV/C M055300100017
spectrometer. M055300100018
SAMPLE Cryogenic targets consisted of three pairs of 5 cm M055300100019
diameter flasks, each pair comprising nominal 4 cm M055300100020
and 15 cm long flasks filled with liquid deuterium. M055300100021
DETECTOR (SCIN,CEREN,MWDC) The detector system consisted of M055300100022
5 layers of scintillator hodoscopes, an aerogel M055300100023
cerenkov counter, and 3 drift chambers. M055300100024
ERR-ANALYS (ERR-T) Errors encluded both statistical errors and M055300100025
systematic onces (total are about < 6.6 %, for M055300100026
theta-cm = 143 degree - < 7.2 %) the sources of which M055300100027
are the following: M055300100028
(ERR-1,,4.6) solid angle determination < 4.6 %; M055300100029
(ERR-2) bremsstrahlung calculation 1.0 %; M055300100030
(ERR-3) acceptance function 2.0 %; M055300100031
(ERR-4,,2.0) software cuts < 2.0 %; M055300100032
(ERR-5) target length 1.0 %; M055300100033
(ERR-6) radiator-out subtraction 1.0 %; M055300100034
(ERR-7,,1.0) particle identification < 1.0 %; M055300100035
(ERR-8,,0.6) beam current integration < 0.6 %; M055300100036
(ERR-9) radiator thickness 0.5 %; M055300100037
(ERR-10,,0.5) tracking efficiency < 0.5 %; M055300100038
(ERR-11) electron beam energy 0.3 %; M055300100039
(ERR-12) momentum calibration 0.3 %; M055300100040
(ERR-13,,0.3) electronuc deadtime < 0.3 %; M055300100041
(ERR-14) target density 0.7 %; M055300100042
(ERR-15) target impurity 0.1 %; M055300100043
(ERR-16) two-step background subtraction M055300100044
for theta-cm = 243 degree 3.0 %. M055300100045
COMMENT The differential cross section for the 2H(gamma,p)n M055300100046
reaction has been measured at several M055300100047
center-of-mass angles ranging from 50 to 143.degr. M055300100048
for proton energies between 0.8 and 1.8 GeV. M055300100049
The experiment was performed at SLAC-NPAS M055300100050
facility with the use of the 1.6 GeV/C M055300100051
spectrometer to detect the high energy protons M055300100052
produced by a bremsstrahlung beam directed at a M055300100053
liquid deuterium target. Contributions from M055300100054
concurrent disintegration by the residual electron M055300100055
beam were determined by measuring the proton yield M055300100056
without the Cu photon radiator. At angles not very M055300100057
far from 90 degree, the energy dependence of the M055300100058
cross sections is consistent with predictions of M055300100059
scaling using counting rules for consitituent M055300100060
quarks. At least one theoretical calculation based M055300100061
on a meson-baryon picture of the reaction is able M055300100062
to reproduce the magnitude and energy dependence M055300100063
of the 90 degree cross section. The angular M055300100064
distribution exhibits a large enhancement at M055300100065
backward angles at the higher energies. M055300100066
HISTORY (19990305C) data were compiled at the USA BNL NNDC by M055300100067
V.V.Varlamov. M055300100068
(20190524A) Corrected by SD and VV: ERR-ANALYS, M055300100069
INC-SOURCE, STATUS, small corrections in BIB section, M055300100070
DATA-ERR -> ERR-T, DATA in SUBENT 002, REACTION, M055300100071
DATA, lowercase. M055300100072
ENDBIB 70 0 M055300100073
COMMON 10 6 M055300100074
ERR-2 ERR-3 ERR-5 ERR-6 ERR-9 ERR-11 M055300100075
ERR-12 ERR-14 ERR-15 ERR-16 M055300100076
PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT M055300100077
PER-CENT PER-CENT PER-CENT PER-CENT M055300100078
1.0 2.0 1.0 1.0 0.5 0.3 M055300100079
0.3 0.7 0.1 3.0 M055300100080
ENDCOMMON 6 0 M055300100081
ENDSUBENT 80 0 M055300199999
SUBENT M0553002 20190524 M100M055300200001
BIB 3 6 M055300200002
REACTION (1-H-2(G,N)1-H-1,,DA,P) M055300200003
STATUS (TABLE) Table 2 from Phys.Rev.,C48(1993)1864 M055300200004
HISTORY (20190524A) Corrected by SD and VV: REACTION (BRS M055300200005
deleted) STATUS, DATA-ERR-> ERR-T, DATA-CM, ERR-T -> M055300200006
ERR-S, DATA EN = 1659 MeV -> 1695 MeV according M055300200007
presentation in the table. M055300200008
ENDBIB 6 0 M055300200009
NOCOMMON 0 0 M055300200010
DATA 4 46 M055300200011
EN ANG-CM DATA-CM ERR-S M055300200012
MEV ADEG NB/SR NB/SR M055300200013
713. 142.1 143. 9. M055300200014
724. 125.8 168. 10. M055300200015
728. 112.4 193. 10. M055300200016
739. 89.0 227. 9. M055300200017
740. 77.6 198. 9. M055300200018
744. 52.4 194. 15. M055300200019
757. 142.6 99. 8. M055300200020
761. 126.4 117. 8. M055300200021
762. 113.0 144. 8. M055300200022
766. 78.0 162. 8. M055300200023
767. 89.5 178. 8. M055300200024
768. 52.7 173. 14. M055300200025
913. 142.3 46.4 3.9 M055300200026
915. 112.4 56.0 3.3 M055300200027
920. 125.0 50.4 2.9 M055300200028
924. 89.0 58.0 2.9 M055300200029
926. 77.6 59.4 3.0 M055300200030
927. 65.5 55.4 3.1 M055300200031
957. 113.0 46.7 2.9 M055300200032
957. 142.7 41.6 3.6 M055300200033
960. 65.9 45.0 3.1 M055300200034
960. 78.0 44.0 2.6 M055300200035
960. 126.4 41.7 2.7 M055300200036
962. 89.5 58.2 2.5 M055300200037
1107. 142.3 22.4 1.3 M055300200038
1109. 88.9 22.6 0.7 M055300200039
1109. 112.5 21.5 0.7 M055300200040
1111. 65.4 24.0 1.4 M055300200041
1148. 142.7 20.1 1.3 M055300200042
1150. 65.8 20.0 1.1 M055300200043
1151. 89.4 17.6 0.6 M055300200044
1151. 113.0 17.7 0.6 M055300200045
1298. 89.0 9.1 0.5 M055300200046
1309. 142.4 12.0 0.8 M055300200047
1310. 112.6 6.9 0.4 M055300200048
1343. 89.5 6.7 0.4 M055300200049
1350. 113.1 6.4 0.4 M055300200050
1351. 142.7 10.6 0.8 M055300200051
1505. 112.6 3.6 0.2 M055300200052
1507. 88.9 4.0 0.2 M055300200053
1512. 142.5 6.5 0.6 M055300200054
1549. 113.1 2.7 0.1 M055300200055
1551. 142.8 5.5 0.6 M055300200056
1553. 89.4 3.7 0.2 M055300200057
1695. 112.6 1.9 0.1 M055300200058
1738. 113.0 1.6 0.1 M055300200059
ENDDATA 48 0 M055300200060
ENDSUBENT 59 0 M055300299999
ENDENTRY 2 0 M055399999999