/*===================================================================*/ /* NRDF D1822 Data No.6 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,6; 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,6; /* 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=ENGY-SPEC'38'; /* '38' 6He energy spectra */ ANL=RMTRX-THEORY; /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,6; INC-ENGY-LAB=73.40MEV; RSD=11N; THTL=12.0DEG; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; EXC-ENGY'39' COUNTS DELTA-COUNTS'40' (MEV) (NODIM) (NODIM) 0.000 7. +-2.65 0.100 4. +-2.00 0.200 5. +-2.24 0.300 6. +-2.45 0.400 1. +-1.00 0.500 6. +-2.45 0.600 8. +-2.83 0.700 8. +-2.83 0.800 6. +-2.45 0.900 7. +-2.65 1.000 9. +-3.00 1.100 9. +-3.00 1.200 18. +-4.24 1.300 23. +-4.80 1.400 31. +-5.57 1.500 31. +-5.57 1.600 36. +-6.00 1.700 51. +-7.14 1.800 58. +-7.62 1.900 93. +-9.64 2.000 153. +-12.37 2.100 178. +-13.34 2.200 172. +-13.11 2.300 170. +-13.04 2.400 146. +-12.08 2.500 135. +-11.62 2.600 119. +-10.91 2.700 127. +-11.27 2.800 103. +-10.15 2.900 93. +-9.64 3.000 94. +-9.70 3.100 80. +-8.94 3.200 71. +-8.43 3.300 65. +-8.06 3.400 70. +-8.37 3.500 81. +-9.00 \END; /*===================================================================*/ |