ENTRY C1971 20130116 C126C197100000001 SUBENT C1971001 20130116 C126C197100100001 BIB 12 48 C197100100002 TITLE Quadrupole Collectivity in 32,34,36,38Si and the N = C197100100003 20 Shell Closure C197100100004 AUTHOR (R.W.Ibbotson,T.Glasmacher,B.A.Brown,L.Chen, C197100100005 M.J.Chromik,P.D.Cottle,M.Fauerbach,K.W.Kemper, C197100100006 D.J.Morrissey,H.Scheit,M.Thoennessen) C197100100007 INSTITUTE (1USAMSU,1USAFSU) C197100100008 REFERENCE (J,PRL,80,(10),2081,1998) C197100100009 #doi:10.1103/PhysRevLett.80.2081 C197100100010 FACILITY (CYCLO,1USAMSU) C197100100011 (FRS,1USAMSU) The experiment was performed using the C197100100012 A1200 Fragment Separator(FRS). C197100100013 DETECTOR (COIN,NAICR,SCIN) The experimental apparatus includes C197100100014 NSCL NaI(Tl) array, silicon PIN, TOF and dE/E and C197100100015 tracking detectors. The NSCL NaI(Tl) array consists C197100100016 of 38 detectors, which are arranged in 3 concentric C197100100017 rings, of 11 (inner), 17 (middle) and 10 (outer) C197100100018 detectors, respectively. The radii of the three C197100100019 detector rings are 10.8 cm, 16.9 cm and 21.8 cm, C197100100020 respectively. The crystals are cylindrical, C197100100021 approximately 18.0 cm long and 5.75 cm in diameter C197100100022 and placed into a 0.45 mm thick aluminum shield. A 1 C197100100023 cm thick quartz window is attached to each end. C197100100024 Optical glue was used to connect 5 cm in diameter C197100100025 photomultiplier tubes (PMTs) to each window. To C197100100026 shield the NaI(Tl) detector array from photons C197100100027 originating at the phoswich detector, and natural C197100100028 radioactivity, the entire array was placed into a 16 C197100100029 cm thick lead shield. The phoswich detector has a C197100100030 diameter of 101.6 mm and is made of 100 mm thick. C197100100031 Slow plastic scintillator (Bicron 444) and a thin C197100100032 layer (0.6 mm thick) of fast plastic scintillator C197100100033 (Bicron 400) is glued to it. The detector is viewed C197100100034 through a lightguide by 2 PMTs (THORN EMI C197100100035 ElectronTubes 9807B02). The PMTs were attached by C197100100036 using Tracon F113 epoxy. In addition, a water cooling C197100100037 system was installed to cool down the PMT voltage C197100100038 dividers because the detector operates in a vacuum. C197100100039 PART-DET (G) C197100100040 METHOD (EDE,GSPEC,TOF,COINC,EXTB) C197100100041 ANALYSIS (PGS,INTAD) Numerical calculations using GEANT were C197100100042 used to extrapolate the efficiency function to 3.3 C197100100043 MeV using a functional form eff = exp(a0 + C197100100044 a1*ln(Eg/E0)), where E0 is an arbitrary reference C197100100045 energy and a0 and a1 are fitted parameters. C197100100046 ERR-ANALYS (DATA-ERR) Uncertainty includes root mean square from C197100100047 efficiency, statistical and geometrical uncertainties. C197100100048 STATUS (APRVD) Approved by authors. C197100100049 HISTORY (20130116C) BP C197100100050 ENDBIB 48 0 C197100100051 NOCOMMON 0 0 C197100100052 ENDSUBENT 51 0 C197100199999 SUBENT C1971002 20130116 C126C197100200001 BIB 3 3 C197100200002 REACTION (79-AU-197(14-SI-32,INL)79-AU-197,PAR,SIG) C197100200003 EN-SEC (E-LVL,14-SI-32) C197100200004 STATUS (TABLE) Table I, page 2082. C197100200005 ENDBIB 3 0 C197100200006 COMMON 3 3 C197100200007 THICKNESS E-LVL E-LVL-ERR C197100200008 G/CM-SQ KEV KEV C197100200009 0.184 1930.0 31.0 C197100200010 ENDCOMMON 3 0 C197100200011 DATA 3 1 C197100200012 EN DATA DATA-ERR C197100200013 MEV/A MB MB C197100200014 37.4 22.1 6.4 C197100200015 ENDDATA 3 0 C197100200016 ENDSUBENT 15 0 C197100299999 SUBENT C1971003 20130116 C126C197100300001 BIB 3 3 C197100300002 REACTION (79-AU-197(14-SI-34,INL)79-AU-197,PAR,SIG) C197100300003 EN-SEC (E-LVL,14-SI-34) C197100300004 STATUS (TABLE) Table I, page 2082. C197100300005 ENDBIB 3 0 C197100300006 COMMON 3 3 C197100300007 THICKNESS E-LVL E-LVL-ERR C197100300008 G/CM-SQ KEV KEV C197100300009 0.255 3305.0 55.0 C197100300010 ENDCOMMON 3 0 C197100300011 DATA 3 1 C197100300012 EN DATA DATA-ERR C197100300013 MEV/A MB MB C197100300014 42.6 18.5 7.2 C197100300015 ENDDATA 3 0 C197100300016 ENDSUBENT 15 0 C197100399999 SUBENT C1971004 20130116 C126C197100400001 BIB 3 3 C197100400002 REACTION (79-AU-197(14-SI-36,INL)79-AU-197,PAR,SIG) C197100400003 EN-SEC (E-LVL,14-SI-36) C197100400004 STATUS (TABLE) Table I, page 2082. C197100400005 ENDBIB 3 0 C197100400006 COMMON 3 3 C197100400007 THICKNESS E-LVL E-LVL-ERR C197100400008 G/CM-SQ KEV KEV C197100400009 0.532 1399.0 25.0 C197100400010 ENDCOMMON 3 0 C197100400011 DATA 3 1 C197100400012 EN DATA DATA-ERR C197100400013 MEV/A MB MB C197100400014 48.2 67.0 21.0 C197100400015 ENDDATA 3 0 C197100400016 ENDSUBENT 15 0 C197100499999 SUBENT C1971005 20130116 C126C197100500001 BIB 3 3 C197100500002 REACTION (79-AU-197(14-SI-38,INL)79-AU-197,PAR,SIG) C197100500003 EN-SEC (E-LVL,14-SI-38) C197100500004 STATUS (TABLE) Table I, page 2082. C197100500005 ENDBIB 3 0 C197100500006 COMMON 3 3 C197100500007 THICKNESS E-LVL E-LVL-ERR C197100500008 G/CM-SQ KEV KEV C197100500009 0.532 1084.0 20.0 C197100500010 ENDCOMMON 3 0 C197100500011 DATA 3 1 C197100500012 EN DATA DATA-ERR C197100500013 MEV/A MB MB C197100500014 42.2 75.0 13.6 C197100500015 ENDDATA 3 0 C197100500016 ENDSUBENT 15 0 C197100599999 SUBENT C1971006 20130116 C126C197100600001 BIB 3 3 C197100600002 REACTION (79-AU-197(18-AR-40,INL)79-AU-197,PAR,SIG) C197100600003 EN-SEC (E-LVL,18-AR-40) C197100600004 STATUS (TABLE) Table I, page 2082. C197100600005 ENDBIB 3 0 C197100600006 COMMON 3 3 C197100600007 THICKNESS E-LVL E-LVL-ERR C197100600008 G/CM-SQ KEV KEV C197100600009 0.184 1465.0 24.0 C197100600010 ENDCOMMON 3 0 C197100600011 DATA 3 1 C197100600012 EN DATA DATA-ERR C197100600013 MEV/A MB MB C197100600014 38.4 75.0 13.6 C197100600015 ENDDATA 3 0 C197100600016 ENDSUBENT 15 0 C197100699999 ENDENTRY 6 0 C197199999999