/*===================================================================*/ /* NRDF D1806 Data No.2 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,2; D#=D1806; TITLE=/Coulomb excitation of 11Be/; PURPOSE=/To make a rigorous test of the first-order equivalent photon method in analyzing the Coulomb excitation reaction, and to examine the effect of the higher-order contribution/; ATH=(T.NAKAMURA'1', T.MOTOBAYASHI'2', Y.ANDO'2', A.MENGONI'3', T.NISHIO'2', H.SAKURAI'3', S.SHIMOURA'2', T.TERANISHI'1', Y.YANAGISAWA'2', M.ISHIHARA'1,2'); INST-ATH=(2JPNTOK'1', 2JPNYOK'2', 2JPNIPC'3'); /* '1' Department of Physics */ /* '2' Department of Physics */ REF=PL/B; VLP=394(1997)11; RCTS=208PB(11BE,11BE)208PB; PHQS=(XSECTN'4', ANGL-DSTRN, TRNSN-PRBTY'5'); /* '4' Coulomb excitation cross section */ /* '5' B(E1) */ /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,2; /* 2003-05-13 : Compiled */ RTY=INEL-SCATT; ENR=X%; CHM=ELM; PHYS-FORM=SLD; THK-TGT=350MG/CM**2; BAC=SELF; POL-TGT=0%; ALGN-TGT=0%; ACC=PRJFS'6'; /* '6' Secondary 11Be produced in the 100 MeV/u 18O fragmentation reaction */ INST-ACC=2JPNIPC'7'; /* '7' Radioactive beam line RIPS [T. Kubo, Nucl. Instr. and Meth. B70(1992)309] */ INC-ENGY-LAB=[63.9MEV/A'8'; /* '8' Average incident energy of secondary 11Be beam */ ERS-PRJ=1%; BEAM-INTNSTY=5E+4PPS'9'; /* '9' Secondary 11Be beam */ POL-PRJ=0%; DET-PARTCL=(GAMMA'10',11BE); /* '10' Delayed gamma from 11Be. 1/2- to 1/2+ (g.s.) */ COINC=(GAMMA,11BE); ANT-COINC=NO; DET-SYS=(SCT'11',NAI'12',EDE'13',TOF'14'); /* '11' Plastic scintillator. Used as E-Delta E and ToF counter to identify 11Be. Position information of the E/dE telescope is also used for determine angular distribution. */ /* '12' DALI system [T. Motobayashi et al., Phys. Lett. B346(1995)9], to detect gamma-rays. Their energy resolution was typically 6% FWHM for the 1275 keV gamma-ray from the 22Na standard source and 50 keV FWHM for 320keV gamma-ray incorporating the angular resolution of about 20 degree. The total full-energy-peak efficiency was calculated to be 15 % for the 320 keV gamma-ray from a moving 11Be nucleus by the code GEANT. */ /* '13' To identify 11Be */ /* '14' To identify 11Be */ /* Experimental Method: - Particle identification by 'E/Delta E' measurement (To identify 11Be) - Time-of-flight (To identify 11Be) RCT=208PB(11BE,11BE)208PB; PHQ=ANGL-DSTRN; ANL=(CC'18',X'19'); /* '18' Quantum mechanical coupled-channel calculation code ECIS79 [J. Raynal, Coupled channel code ECIS79, unpublished.] /* '19' Equivalent photon method based on a semi-classical first-order perturbation theory, see Eq.(1), p13 in the reference */ /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,2; EMT-1=11BE; EXC-ENGY-EMT-1=320KEV; J-PTY-EMT-1=1/2-; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; THTC DSIGMA/DOMEGA DELTA-DSIGMA/DOMEGA'20' (DEG) (B/SR) (B/SR) 0.472 75.05 +-6.27 1.447 40.61 +-1.92 2.413 15.13 +-0.82 3.419 5.217 +-0.372 4.338 1.339 +-0.169 \END; /*===================================================================*/ |