ENTRY C1153 20130528 C130C115300000001 SUBENT C1153001 20130528 C130C115300100001 BIB 12 56 C115300100002 TITLE Direct Evidence for the Breakdown of the N = 8 Shell C115300100003 Closure in 12Be C115300100004 AUTHOR (A.Navin,D.W.Anthony,T.Aumann,T.Baumann,D.Bazin, C115300100005 Y.Blumenfeld,B.A.Brown,T.Glasmacher,P.G.Hansen, C115300100006 R.W.Ibbotson,P.A.Lofy,V.Maddalena,K.Miller, C115300100007 T.Nakamura,B.V.Pritychenko,B.M.Sherrill,E.Spears, C115300100008 M.Steiner,J.A.Tostevin,J.Yurkon,A.Wagner) C115300100009 REFERENCE (J,PRL,85,(2),266,2000) C115300100010 #doi:10.1103/PhysRevLett.85.266 C115300100011 INSTITUTE (1USAMSU,3INDTRM,1USABNL,2JPNTOK,2UK SUR) C115300100012 FACILITY (CYCLO,1USAMSU) C115300100013 SAMPLE (4-BE-9,ENR=1.0) 151 mg/cm2 Be target. C115300100014 PART-DET (G) C115300100015 DETECTOR (NAICR,SCIN,MAGSP) The experimental apparatus C115300100016 includes NSCL NaI(Tl) array, large acceptance S800 C115300100017 superconducting spectrograph. The NSCL NaI(Tl) array C115300100018 consists of 38 detectors, which are arranged in 3 C115300100019 concentric rings, of 11 (inner), 17 (middle) and 10 C115300100020 (outer) detectors, respectively. The radii of the C115300100021 three detector rings are 10.8 cm, 16.9 cm and 21.8 cm, C115300100022 respectively. The crystals are cylindrical, C115300100023 approximately 18.0 cm long and 5.75 cm in diameter C115300100024 and placed into a 0.45 mm thick aluminum shield. A 1 C115300100025 cm thick quartz window is attached to each end. C115300100026 Optical glue was used to connect 5 cm in diameter C115300100027 photomultiplier tubes (PMTs) to each window. To C115300100028 shield the NaI(Tl) detector array from photons C115300100029 originating at the phoswich detector, and natural C115300100030 radioactivity, the entire array was placed into a 16 C115300100031 cm thick lead shield. C115300100032 METHOD (COINC,GSPEC,TOF) The 12Be beam was incident on a 151 C115300100033 mg/cm2 9Be target which was surrounded by an array of C115300100034 38 NaI(Tl) position-sensitive gamma-ray detectors. C115300100035 The position information from the array was used to C115300100036 correct for the Doppler effect by converting event by C115300100037 event the registered gamma energy to the projectile C115300100038 rest frame. C115300100039 ANALYSIS (PGS) We have constructed the response by using the C115300100040 code GEANT to create simulated events, which were C115300100041 adjusted to the known energy resolution and C115300100042 subsequently analyzed in the same way as the real data.C115300100043 ERR-ANALYS (DATA-ERR) Only selected systematic errors are given. C115300100044 (ERR-1) A photopeak detection efficiency with a C115300100045 relative accuracy of 5%. C115300100046 (ERR-2) An adjustment with a linear background C115300100047 component and the range restricted to the photopeak C115300100048 and just above (250 - 500 keV) increases this by 1.4% C115300100049 (absolute) but gives a poorer fit in the region from C115300100050 150 to 250 keV. The possible systematic error arising C115300100051 from the background is reflected in the error limit. C115300100052 (ERR-3) Absolute intensity error 4.5%. C115300100053 (ERR-4) Branching ratio error 4.5%. C115300100054 HISTORY (20050125C) DR C115300100055 (20130528A) BP: Complete update of BIB section, C115300100056 addition of sub.3, correction of REACTION information C115300100057 in the old sub. C115300100058 ENDBIB 56 0 C115300100059 COMMON 5 3 C115300100060 EN ERR-1 ERR-2 ERR-3 ERR-4 C115300100061 MEV/A PER-CENT PER-CENT PER-CENT PER-CENT C115300100062 78.0 5.0 1.4 4.5 4.5 C115300100063 ENDCOMMON 3 0 C115300100064 ENDSUBENT 63 0 C115300199999 SUBENT C1153002 20130528 C130C115300200001 BIB 3 4 C115300200002 REACTION (4-BE-9(4-BE-12,X)4-BE-11,PAR,SIG) C115300200003 STATUS (TABLE) Table I, page 268. C115300200004 LEVEL-PROP (4-BE-11,E-LVL=0.,SPIN=0.5,PARITY=+1.) C115300200005 (4-BE-11,E-LVL=0.32,SPIN=0.5,PARITY=-1.) C115300200006 ENDBIB 4 0 C115300200007 NOCOMMON 0 0 C115300200008 DATA 3 2 C115300200009 E-LVL DATA DATA-ERR C115300200010 MEV MB MB C115300200011 0.0 32.0 4.7 C115300200012 0.320 17.5 2.6 C115300200013 ENDDATA 4 0 C115300200014 ENDSUBENT 13 0 C115300299999 SUBENT C1153003 20130528 C130C115300300001 BIB 2 2 C115300300002 REACTION (4-BE-9(4-BE-12,X)4-BE-11,,SIG) C115300300003 STATUS (TABLE) page 267. C115300300004 ENDBIB 2 0 C115300300005 NOCOMMON 0 0 C115300300006 DATA 2 1 C115300300007 DATA DATA-ERR C115300300008 MB MB C115300300009 49.5 4.5 C115300300010 ENDDATA 3 0 C115300300011 ENDSUBENT 10 0 C115300399999 ENDENTRY 3 0 C115399999999