/*===================================================================*/ /* NRDF D1822 Data No.18 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,18; D#=D1822; TITLE=/Structure of the unbound 11N nucleus by the (3He,6He) reaction/; PURPOSE=/This experiment was performed in order to confirm the energies and widths of the ground state and low-lying levels of the unbound 11N in the consideration of a possible halo structure in 11N./; ATH=(V.GUIMARAES'1', S.KUBONO'2', F.C.BARKER'3', M.HOSAKA'4', S.C.JEONG'5', I.KATAYAMA'5', T.MIYACHI'2', T.NOMURA'5', M.H.TANAKA'5', Y.FUCHI'5', H.KAWASHIMA'5', S.KATO'6', C.C.YUN'7', K.ITO'7', H.ORIHARA'7', T.TERAKAWA'7', T.KISHIDA'8', Y.PU'8', S.HAMADA'9', M.HIRAI'10', H.MIYATAKE'5'); INST-ATH=(3BZLUSP'1', 2JPNTOK'2', 3AULCBR'3', 2JPNJPN'4', 2JPNKEK'5', 2JPNYMG'6', 2JPNTOH'7', 2JPNIPC'8', 2JPNJAE'9', 2JPNTOK'10'); /* '1' Instituto de Fisica */ /* '2' Center for Nuclear Study */ /* '3' Department of Theoretical Physics, Research School of Physical Science and Engineering */ /* '4' Institute for Molecular Science, Okazaki */ /* '5' Institute of Particle and Nuclear Studies */ /* '6' Physics Department */ /* '7' Cyclotron and Radioisotope Center */ /* '10' Department of Physics */ REF=(PR/C'11', RBF'12'); VLP=(67(2003)064601'11', 33(2003)263'12'); /* '12' V.Guimaraes et al., Proceedings of the XXV Workshop on Nuclear Physics in Brazil (Sao Pedro, 2002) */ RCTS=14N(3HE,6HE)11N; PHQS=(ENGY-SPEC'13', RESN-ENGY'14', ANGL-DSTRN, OPT-POTL-PARA); /* '13' 6He energy spectra */ /* '14' Energy above the 10C+p threshold (decay energy) of the 11N reasonance */ /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,18; /* 2003-10-03 : Compiled */ RTY=PKUP; ENR=99.95%; CHM=ELM; PHYS-FORM=GAS; THK-TGT=XMG/CM**2'15'; /* '15' 14N2 gas target filled to a pressure of about 21 cm Hg */ POL-TGT=0%; ALGN-TGT=0%; ACC=CYC; INST-ACC=2JPNTOK'16'; /* '16' Center for Nuclear Study */ INC-ENGY-LAB=73.40MEV; ERS-PRJ=0.05MEV; BEAM-INTNSTY=[0.5UA; POL-PRJ=0%; DET-PARTCL=6HE; COINC=NO; ANT-COINC=NO; DET-SYS=(MAG'17',PROP-CNTR'18',SCT'19',TOF'20',EDE'21'); /* '17' QDD type spectrograph to analyze 6He and other products /* '18' Gas proportinal counter to detect reaction products and measure energy loss */ /* '19' To measure energy and time-of-flight */ /* '20' ToF was obtained from the time interval between cyclotron-rf and fast signal from plastic scintillator. */ /* '21' E and Delta E are obtained from plastic scintillator and proportional counter. */ ERS-DET=[200KEV'22'; /* '22' FWHM */ CALB-DET=/ The known states of 21Mg from 24Mg(3He,6He)21Mg is used for energy calibration. /; /* Experimental Method: - Time-of-flight (ToF was obtained from the time interval between cyclotron-rf and fast signal from plastic scintillator.) - Particle identification by 'E/Delta E' measurement (E and Delta E are obtained from plastic scintillator and proportional counter.) RCT=14N(3HE,6HE)11N; PHQ=OPT-POTL-PARA; ANL=DWBA'78'; /* '78' The exact finite-range DWBA using the computer code TWOFNR(M. Igarashi unpublished) was used for the analysis of the characteristic behavior at forward angles in the experimental angular distributions. */ /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,18; INC-ENGY-LAB=73.40MEV; RSD=11N; POTL-FORM=/ Uc(X) -V*F(X,Rr,Ar) -i*W*F(X,Riv,Aiv) : Uniform charge of radius Rc*A**(1/3) : f(X,R,A)=1/(1+exp((X-R*A**(1/3))/A) /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; V RR AR WV RIV AIV RC FLAG'79' (MEV) (FM) (FM) (MEV) (FM) (FM) (FM) (NODIM) 160.00 1.633 0.375 35.00 1.015 1.767 1.3 1 64.70 1.350 0.717 13.00 1.500 0.800 1.3 2 X 1.25 0.65 X X X X 3 X 1.25 0.65 X X X X 4 \END; /*===================================================================*/ |