ENTRY E1991 20070208 E042E199100000001 SUBENT E1991001 20070208 E042E199100100001 BIB 13 42 E199100100002 TITLE Observation of strong low-lying E1 strength in the E199100100003 two-neutron halo nucleus 11Li E199100100004 AUTHOR (T.Nakamura, A.M.Vinodkumar, T.Sugimoto, N.Aoi, H.Baba,E199100100005 D.Bazin, N.Fukuda, T.Gomi, H.Hasegawa, N.Imai, E199100100006 M.Ishihara, T.Kobayashi, Y.Kondo, T.Kubo, M.Miura, E199100100007 T.Motobayashi, H.Otsu, A.Saito, H.Sakurai, S.Shimoura, E199100100008 K.Watanabe, Y.X.Watanabe, T.Yakushiji, Y.Yanagisawa, E199100100009 K.Yoneda) E199100100010 INSTITUTE (2JPNTIT) Department of Physics E199100100011 (2JPNIPC) E199100100012 (2JPNYOK) Department of Physics E199100100013 (1USAMSU) National Supercondugting Cyclotron E199100100014 Laboratory E199100100015 (2JPNKEK) E199100100016 (2JPNTOH) Department of Physics E199100100017 (2JPNTOK) Center for Nuclear Study E199100100018 REFERENCE (J,PRL,96,(25),252502,200606) E199100100019 PART-DET (N,3-LI-9) E199100100020 INC-SOURCE Beam intensity: 2.0e4 ions/sec E199100100021 INC-SPECT [EN-RSL] Momentum spread of +-3% E199100100022 SAMPLE - Chemical-form of target is element. E199100100023 - Physical-form of target is solid. E199100100024 - Target-thickness is 346 mg/cm**2. E199100100025 METHOD (COINC) Exclusion of two neutron signals from two E199100100026 independent single neutron emission events are E199100100027 confirmed to be negligible using 7Li(p,n)7Be E199100100028 reactions. E199100100029 FACILITY (CYCLO,2JPNIPC) To accelerate primary 100 MeV/A 18O E199100100030 beam at RIKEN Accelerator Research E199100100031 Facility E199100100032 (PRJFS,2JPNIPC) To separate fragment from Be target E199100100033 bombarded by 18O beam at RIKEN E199100100034 projectile-fragment separator E199100100035 DETECTOR (NAICR) DALI: To detect gamma from 9Li (no significant E199100100036 gamma line was observed) E199100100037 (SCIN) To detect two neutrons E199100100038 (DRFTC) To detect 9Li E199100100039 ADD-RES E1991.005:82-PB-0(3-LI-11,INL)82-PB-0 E199100100040 Transition strength (dE(B1)/dE(rel)) E199100100041 See NRDF D1991 DATA,4 for detail. E199100100042 HISTORY (20060703C) Kc + On E199100100043 (20060703R) On. Received by e-mail from T.Nakamura E199100100044 ENDBIB 42 0 E199100100045 COMMON 1 3 E199100100046 EN E199100100047 MEV/A E199100100048 69.7 E199100100049 ENDCOMMON 3 0 E199100100050 ENDSUBENT 49 0 E199100199999 SUBENT E1991002 20070208 E042E199100200001 BIB 5 12 E199100200002 REACTION (82-PB-0(3-LI-11,INL)82-PB-0,PAR,DA) E199100200003 EN-SEC ANG-CM is polar angle between beam and 11Li in center E199100200004 of mass system E199100200005 (E-EXC,3-LI-11) Excitation energy of 11Li measured E199100200006 from 9Li-2n threshold E199100200007 ERR-ANALYS (ERR-S) Statistical uncertainty E199100200008 (ERR-SYS) Systematic error in absolute normalization E199100200009 coming from primarily from uncertainties in E199100200010 neutron detection efficiency E199100200011 ADD-RES (COMP) Equivalent photon method E199100200012 STATUS (TABLE) Data (Fig.2, p252502-3 in reference) received E199100200013 by e-mail from T.Nakamura (2006.07.03) E199100200014 ENDBIB 12 0 E199100200015 COMMON 2 3 E199100200016 E-EXC-MAX ERR-SYS E199100200017 MEV PER-CENT E199100200018 4. 12. E199100200019 ENDCOMMON 3 0 E199100200020 DATA 3 20 E199100200021 ANG-CM DATA-CM ERR-S E199100200022 ADEG B/SR B/SR E199100200023 0.125 1.535E+03 1.348E+02 E199100200024 0.375 1.448E+03 7.944E+01 E199100200025 0.625 1.053E+03 6.271E+01 E199100200026 0.875 9.024E+02 5.137E+01 E199100200027 1.125 6.303E+02 3.661E+01 E199100200028 1.375 4.607E+02 2.733E+01 E199100200029 1.625 2.983E+02 2.319E+01 E199100200030 1.875 1.725E+02 2.429E+01 E199100200031 2.125 1.294E+02 1.480E+01 E199100200032 2.375 6.736E+01 1.648E+01 E199100200033 2.625 5.595E+01 9.195E+00 E199100200034 2.875 3.820E+01 7.338E+00 E199100200035 3.125 1.814E+01 5.573E+00 E199100200036 3.375 4.096E+00 5.237E+00 E199100200037 3.625 8.066E+00 4.923E+00 E199100200038 3.875 3.830E+00 6.639E+00 E199100200039 4.125 -2.895E+00 7.215E+00 E199100200040 4.375 4.068E+00 3.805E+00 E199100200041 4.625 8.464E+00 3.184E+00 E199100200042 4.875 1.258E+00 9.522E-01 E199100200043 ENDDATA 22 0 E199100200044 ENDSUBENT 43 0 E199100299999 SUBENT E1991003 20070208 E042E199100300001 BIB 4 10 E199100300002 REACTION (82-PB-0(3-LI-11,INL)82-PB-0,,IPA/DE) E199100300003 Breakup cross sections E199100300004 EN-SEC (E-EXC,3-LI-11) Excitation energy of 11Li measured E199100300005 from 9Li-2n threshold E199100300006 ERR-ANALYS (ERR-S) Statistical uncertainty E199100300007 (ERR-SYS) Systematic error in absolute normalization E199100300008 coming from primarily from uncertainties in E199100300009 neutron detection efficiency E199100300010 STATUS (TABLE) Data (Fig.2, p252502-3 in reference) received E199100300011 by e-mail from T.Nakamura (2006.07.03) E199100300012 ENDBIB 10 0 E199100300013 COMMON 2 3 E199100300014 ANG-CM-MAX ERR-SYS E199100300015 ADEG PER-CENT E199100300016 5. 12. E199100300017 ENDCOMMON 3 0 E199100300018 DATA 3 40 E199100300019 E-EXC DATA ERR-S E199100300020 MEV B/MEV B/MEV E199100300021 0.050 3.333E-01 4.808E-02 E199100300022 0.150 1.591E+00 8.751E-02 E199100300023 0.250 2.686E+00 1.045E-01 E199100300024 0.350 2.732E+00 1.071E-01 E199100300025 0.450 2.334E+00 9.844E-02 E199100300026 0.550 1.882E+00 1.074E-01 E199100300027 0.650 1.623E+00 9.308E-02 E199100300028 0.750 1.345E+00 8.698E-02 E199100300029 0.850 1.168E+00 9.793E-02 E199100300030 0.950 7.651E-01 7.982E-02 E199100300031 1.050 6.770E-01 1.049E-01 E199100300032 1.150 7.711E-01 6.416E-02 E199100300033 1.250 6.581E-01 7.743E-02 E199100300034 1.350 5.825E-01 8.529E-02 E199100300035 1.450 3.898E-01 9.967E-02 E199100300036 1.550 4.609E-01 8.829E-02 E199100300037 1.650 3.564E-01 1.141E-01 E199100300038 1.750 4.247E-01 7.353E-02 E199100300039 1.850 2.907E-01 1.217E-01 E199100300040 1.950 1.841E-01 9.375E-02 E199100300041 2.050 2.555E-01 9.604E-02 E199100300042 2.150 4.468E-01 7.670E-02 E199100300043 2.250 1.925E-02 1.681E-01 E199100300044 2.350 2.420E-01 1.116E-01 E199100300045 2.450 1.285E-01 1.192E-01 E199100300046 2.550 2.108E-01 8.959E-02 E199100300047 2.650 3.379E-01 1.018E-01 E199100300048 2.750 2.604E-01 6.831E-02 E199100300049 2.850 5.528E-02 9.318E-02 E199100300050 2.950 1.971E-01 6.690E-02 E199100300051 3.050 1.235E-01 8.163E-02 E199100300052 3.150 1.402E-01 9.559E-02 E199100300053 3.250 1.870E-01 1.271E-01 E199100300054 3.350 3.969E-02 1.347E-01 E199100300055 3.450 1.899E-01 1.110E-01 E199100300056 3.550 2.832E-01 9.467E-02 E199100300057 3.650 3.326E-01 8.091E-02 E199100300058 3.750 1.341E-01 5.158E-02 E199100300059 3.850 -2.638E-02 1.637E-01 E199100300060 3.950 2.113E-02 1.466E-01 E199100300061 ENDDATA 42 0 E199100300062 ENDSUBENT 61 0 E199100399999 SUBENT E1991004 20070208 E042E199100400001 BIB 4 6 E199100400002 REACTION (82-PB-0(3-LI-11,INL)82-PB-0,PAR,SIG) E199100400003 EN-SEC (E-EXC,3-LI-11) Excitation energy of 11Li measured E199100400004 from 9Li-2n threshold E199100400005 ERR-ANALYS (ERR-S) Statistical uncertainty E199100400006 (ERR-SYS) Total systematic uncertainty E199100400007 STATUS (TABLE) Data taken from text, p252502-2 in reference E199100400008 ENDBIB 6 0 E199100400009 COMMON 1 3 E199100400010 E-EXC-MAX E199100400011 MEV E199100400012 3. E199100400013 ENDCOMMON 3 0 E199100400014 DATA 3 1 E199100400015 DATA ERR-S ERR-SYS E199100400016 B B B E199100400017 2.34 0.05 0.28 E199100400018 ENDDATA 3 0 E199100400019 ENDSUBENT 18 0 E199100499999 NOSUBENT E1991005 20070208 E042E199100500001 ENDENTRY 5 0 E199199999999