ENTRY L0184 20130711 L022L018400000001
SUBENT L0184001 20130711 L022L018400100001
BIB 12 33 L018400100002
TITLE Photo-production of Negative Pions on 15N Using L018400100003
Egamma = 184 MeV Tagged Photons L018400100004
AUTHOR (H.T.Chung,J.C.Kim,J.Shaw,T.Kobayashi,H.Choi,P.Stoler, L018400100005
H.B.Van Den Brink,H.P.Block,W.H.A.Hesselink,T.Gresko, L018400100006
K.Keeter, J.H.Mitchell,B.Norum,E.L.Hallin,D.M.Skopik, L018400100007
J.M.Vogt, T.P.Welch) L018400100008
REFERENCE (J,KPS,29,(5),581,1996) L018400100009
INSTITUTE (3KORNSU,1USARPI,2NEDFUL,1USAVIR,1CANSAS,1USAORU) L018400100010
FACILITY (LINAC,1CANSAS) L018400100011
SAMPLE (7-N-15,ENR=0.998) A urea-form aldehyde (NH3CONH2) L018400100012
and 300 +- 2 mg/cm2 commercial CH2 targets were used L018400100013
in the experiment. L018400100014
DETECTOR (MWPC,CEREN,SCIN) Each of two telescopes consisted of L018400100015
two multi-wire proportional chambers, one Cherenkov L018400100016
detector, and 16 NE 102 plastic scintillators. L018400100017
PART-DET (PI,E,P) L018400100018
INC-SOURCE (BRST,TAGD) L018400100019
METHOD (EXTB,COINC) A tagged photon beam was obtained L018400100020
from an electron beam of energy 268 MeV. Only the L018400100021
photons coming with the proper secondary electrons in L018400100022
specified coincidence resolving time are tagged L018400100023
photons. Pions were produced by properly tagged L018400100024
photons. Particle identification was based on the L018400100025
comparison experimental energy loss with the Birk's L018400100026
formula calculations. L018400100027
ANALYSIS The differential cross section of a (gamma,pi) L018400100028
reaction in the lab system is dsigma/domega = L018400100029
Npi/(Ngamma*(Nt/cos (thetat))*DOmega), where Npi is L018400100030
the number of pions, Ngamma is the number of incident L018400100031
photons, Nt is the number of target nuclei, thetat=45 L018400100032
degrees is the angle of the target to the beamline, L018400100033
and DOmega is the detector solid angle. L018400100034
HISTORY (20130711C) BP L018400100035
ENDBIB 33 0 L018400100036
COMMON 1 3 L018400100037
EN-RSL L018400100038
PER-CENT L018400100039
0.01 L018400100040
ENDCOMMON 3 0 L018400100041
ENDSUBENT 40 0 L018400199999
SUBENT L0184002 20130711 L022L018400200001
BIB 4 6 L018400200002
REACTION 1(1-H-1(G,PIP)0-NN-1,,DA) L018400200003
2(1-H-1(G,PIP)0-NN-1,,DA) L018400200004
METHOD 1Telescope 1. L018400200005
2Telescope 2. L018400200006
STATUS (CURVE) Fig.6, page 584. L018400200007
ERR-ANALYS (DATA-ERR) No details are given. L018400200008
ENDBIB 6 0 L018400200009
COMMON 1 3 L018400200010
ANG-CM L018400200011
ADEG L018400200012
57.0 L018400200013
ENDCOMMON 3 0 L018400200014
DATA 6 2 L018400200015
EN EN-ERR DATA-CM 1DATA-ERR 1DATA-CM 2DATA-ERR 2L018400200016
MEV MEV MB/SR MB/SR MB/SR MB/SR L018400200017
193.0 5.0 7.008E-03 6.05E-04 L018400200018
192.0 5.0 6.782E-03 4.46E-04L018400200019
ENDDATA 4 0 L018400200020
ENDSUBENT 19 0 L018400299999
SUBENT L0184003 20130711 L022L018400300001
BIB 4 6 L018400300002
REACTION (7-N-15(G,PIN)8-O-15,PAR,DA) L018400300003
STATUS (CURVE) Fig.8, page 585. L018400300004
METHOD Two telescopes were located at 45 and 80 degrees and L018400300005
later shifted to 60 and 100 degrees in the lab system. L018400300006
ERR-ANALYS (DATA-ERR) The error bars of the experimental data L018400300007
include statistical and systematic errors. L018400300008
ENDBIB 6 0 L018400300009
COMMON 1 3 L018400300010
E-LVL L018400300011
MEV L018400300012
0.0 L018400300013
ENDCOMMON 3 0 L018400300014
DATA 5 4 L018400300015
ANG-CM EN EN-ERR DATA-CM DATA-ERR L018400300016
ADEG MEV MEV MB/SR MB/SR L018400300017
45.976 184.5 4.5 1.18E-03 5.94E-04 L018400300018
60.756 184.0 5.0 3.73E-04 3.28E-04 L018400300019
81.013 184.5 4.5 5.19E-04 2.73E-04 L018400300020
100.882 186.0 4.0 4.37E-04 3.28E-04 L018400300021
ENDDATA 6 0 L018400300022
ENDSUBENT 21 0 L018400399999
ENDENTRY 3 0 L018499999999