/*===================================================================*/ /* NRDF D1991 Data No.1 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,1; D#=D1991; TITLE=/ Observation of strong low-lying E1 strength in the two-neutron halo nucleus 11Li /; ATH=(T.NAKAMURA'1', A.M.VINODKUMAR'1', T.SUGIMOTO'1', N.AOI'2', H.BABA'3', D.BAZIN'4', N.FUKUDA'2', T.GOMI'2', H.HASEGAWA'3', N.IMAI'5', M.ISHIHARA'2', T.KOBAYASHI'6', Y.KONDO'1', T.KUBO'2', M.MIURA'1', T.MOTOBAYASHI'2', H.OTSU'6', A.SAITO'7', H.SAKURAI'2', S.SHIMOURA'7', K.WATANABE'6', Y.X.WATANABE'5', T.YAKUSHIJI'6', Y.YANAGISAWA'2', K.YONEDA'2'); INST-ATH=(2JPNTIT'1', 2JPNIPC'2', 2JPNRIK'3', 1USAMSU'4', 2JPNKEK'5', 2JPNTOH'6', 2JPNTOK'7'); /* '1' Department of Physics */ /* '3' Department of Physics */ /* '4' National Supercondugting Cyclotron Laboratory */ /* '6' Department of Physics */ /* '7' Center for Nuclear Study */ REF=PRL; VLP=96(2006)252502; RCTS=PB(11LI,11LI)PB; PHQS=(ANGL-DSTRN, ENGY-SPEC, XSECTN, TRNSN-STRGTH'8'); /* '8' dE(B1)/dE(rel) */ /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,1; /* 2006-07-03 : Compiled, Kc + On */ /* 2006-07-03 : Recieved, On. Received by e-mail from T.Nakamura RTY=INEL-SCATT; CHM=ELM; PHYS-FORM=SLD; THK-TGT=346MG/CM**2; POL-TGT=0%; ALGN-TGT=0%; ACC=(CYC'9',PRJFS'10'); /* '9' To accelerate primary 100 MeV/A 18O beam */ /* '10' To separate fragment from Be target bombarded by 18O beam */ INST-ACC=(2JPNIPC'9',2JPNIPC'10'); /* '9' RIKEN Accelerator Research Facility */ /* '10' RIKEN projectile-fragment separator */ INC-ENGY-LAB=69.7MEV/A; ERS-PRJ=XKEV'11'; /* '11' Momentum spread of +-3% */ BEAM-INTNSTY=XPNA'12'; /* '12' 2.0e4 ions/sec */ POL-PRJ=0%; DET-PARTCL=(N,9LI); COINC=(N,N,9LI); ANT-COINC=NO; DET-SYS=(NAI'13',SCT'14',DRFTC'15'); /* '13' DALI: To detect gamma from 9Li (no significant gamma line was observed) */ /* '14' To detect two neutrons */ /* '15' To detect 9Li */ /* Experimental Method: - Coincidence (Exclusion of two neutron signals from two independent single neutron emission events are confirmed to be negligible using 7Li(p,n)7Be reactions.) RCT=PB(11LI,11LI)PB; PHQ=ANGL-DSTRN; ANL=X'16'; /* '16' Equivalent photon method */ /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,1; INC-ENGY-LAB=69.7MEV/A; SYS-ERR=12%'17'; /* '17' Total systematic error. Systematic error in absolute normalization coming from primarily from uncertainties in neutron detection efficiency */ EXC-ENGY-EMT-MAX=4MEV'18'; /* '18' Excitation energy of 11Li measured from 9Li-2n threshold /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; THTC DSIGMA/DOMEGA DELTA-DSIGMA/DOMEGA'19' (DEG) (B/SR) (B/SR) 0.125 1.535E+03 +-1.348E+02 0.375 1.448E+03 +-7.944E+01 0.625 1.053E+03 +-6.271E+01 0.875 9.024E+02 +-5.137E+01 1.125 6.303E+02 +-3.661E+01 1.375 4.607E+02 +-2.733E+01 1.625 2.983E+02 +-2.319E+01 1.875 1.725E+02 +-2.429E+01 2.125 1.294E+02 +-1.480E+01 2.375 6.736E+01 +-1.648E+01 2.625 5.595E+01 +-9.195E+00 2.875 3.820E+01 +-7.338E+00 3.125 1.814E+01 +-5.573E+00 3.375 4.096E+00 +-5.237E+00 3.625 8.066E+00 +-4.923E+00 3.875 3.830E+00 +-6.639E+00 4.125 -2.895E+00 +-7.215E+00 4.375 4.068E+00 +-3.805E+00 4.625 8.464E+00 +-3.184E+00 4.875 1.258E+00 +-9.522E-01 \END; /*===================================================================*/ |