ENTRY C1985 20130319 C130C198500000001 SUBENT C1985001 20130319 C130C198500100001 BIB 10 57 C198500100002 TITLE Spectroscopy of 13,14B via the one-neutron knockout C198500100003 reaction C198500100004 AUTHOR (V.Guimaraes,J.J.Kolata,D.Bazin,B.Blank,B.A.Brown, C198500100005 T.Glasmacher,P.G.Hansen,R.W.Ibbotson,D.Karnes, C198500100006 V.Maddalena, A.Navin,B.Pritychenko,B.M.Sherrill, C198500100007 D.P.Balamuth,J.E.Bush) C198500100008 REFERENCE (J,PR/C,61,(6),064609,2000) C198500100009 #doi:10.1103/PhysRevC.61.064609 C198500100010 INSTITUTE (1USANOT,1USAMSU,1USAPEN) C198500100011 FACILITY (CYCLO,1USAMSU) C198500100012 PART-DET (G) C198500100013 DETECTOR (NAICR,SCIN,MAGSP) The experimental apparatus C198500100014 includes NSCL NaI(Tl) array, large acceptance S800 C198500100015 superconducting spectrograph. The NSCL NaI(Tl) array C198500100016 consists of 38 detectors, which are arranged in 3 C198500100017 concentric rings, of 11 (inner), 17 (middle) and 10 C198500100018 (outer) detectors, respectively. The radii of the C198500100019 three detector rings are 10.8 cm, 16.9 cm and 21.8 cm, C198500100020 respectively. The crystals are cylindrical, C198500100021 approximately 18.0 cm long and 5.75 cm in diameter C198500100022 and placed into a 0.45 mm thick aluminum shield. A 1 C198500100023 cm thick quartz window is attached to each end. C198500100024 Optical glue was used to connect 5 cm in diameter C198500100025 photomultiplier tubes (PMTs) to each window. To C198500100026 shield the NaI(Tl) detector array from photons C198500100027 originating at the phoswich detector, and natural C198500100028 radioactivity, the entire array was placed into a 16 C198500100029 cm thick lead shield. C198500100030 METHOD (COINC,GSPEC,TOF) The gamma rays from the decay of C198500100031 13B excited states were detected by an array of 38 C198500100032 cylindrical NaI(Tl) detectors which completely C198500100033 surrounded the target. Recoiling 13B core fragments C198500100034 were momentum analyzed using the S800 spectrograph. C198500100035 The targets of Be and Au were 228 and 256 mg/cm2 C198500100036 thick, respectively, chosen to produce an energy C198500100037 straggling of about the same magnitude as the C198500100038 resolution of the spectrograph. Time-of-flight C198500100039 information over a distance of 70 m combined with C198500100040 the energy loss and total energy signal obtained with C198500100041 a segmented ion chamber and a 5 cm thick plastic C198500100042 scintillator, respectively, were used to identify and C198500100043 measure the yields of the fragments in the focal C198500100044 plane of the spectrograph. Two x/y position-sensitive C198500100045 cathode-readout drift chambers in the focal plane C198500100046 were used to determine the momentum and angle C198500100047 information of the fragments. C198500100048 ANALYSIS (PGS) An energy spectrum of gamma rays in coincidence C198500100049 with 13B fragments has been transformed into the C198500100050 projectile rest frame using the position of the C198500100051 incident g ray measured in the NaI array, which C198500100052 allows for Doppler correction on an event-by-event C198500100053 basis via Monte-Carlo simulation using the code C198500100054 GEANT. The simulation took into account Doppler C198500100055 broadening, the distortion of the shapes caused by C198500100056 the back transformation to the projectile rest frame, C198500100057 and the calculated gamma-ray detection efficiencies. C198500100058 HISTORY (20130319C) BP C198500100059 ENDBIB 57 0 C198500100060 COMMON 2 3 C198500100061 EN EN-ERR C198500100062 MEV/A MEV/A C198500100063 59.2 0.3 C198500100064 ENDCOMMON 3 0 C198500100065 ENDSUBENT 64 0 C198500199999 SUBENT C1985002 20130319 C130C198500200001 BIB 7 19 C198500200002 REACTION (4-BE-9(5-B-14,X)5-B-13,PAR,SIG) C198500200003 STATUS (TABLE) Table I, page 064609-3. C198500200004 SAMPLE 228 mg/cm2 Be target. C198500200005 ERR-ANALYS (ERR-T) The overall error in these cross sections are C198500200006 of the order of 18% mostly due to systematic C198500200007 uncertainties. C198500200008 (ERR-1) the uncertainties in the number of particles C198500200009 in the beam 12%. C198500200010 (ERR-2) the uncertainties of target thickness 5%. C198500200011 FLAG (1.) Cross section obtained by deconvolution of the C198500200012 l=0 contributions. C198500200013 (2.) Cross section obtained by deconvolution of the C198500200014 l=2 contributions. C198500200015 LEVEL-PROP (5-B-13,E-LVL=0.0,SPIN=1.5,PARITY=-1.) C198500200016 (5-B-13,E-LVL=3.48,SPIN=1.5,PARITY=+1.) C198500200017 (5-B-13,E-LVL=3.68,SPIN=2.5,PARITY=+1.) C198500200018 (5-B-13,E-LVL=4.13) C198500200019 MISC-COL (MISC) Contributions to the longitudinal momentum C198500200020 distribution. C198500200021 ENDBIB 19 0 C198500200022 COMMON 2 3 C198500200023 ERR-1 ERR-2 C198500200024 PER-CENT PER-CENT C198500200025 12.0 5.0 C198500200026 ENDCOMMON 3 0 C198500200027 DATA 5 5 C198500200028 E-LVL DATA ERR-T FLAG MISC C198500200029 MEV MB MB NO-DIM NO-DIM C198500200030 0.0 113.0 15.0 1. 0. C198500200031 0.0 14.0 3.0 2. 2. C198500200032 3.48 18.0 3.0 1. C198500200033 3.68 30.0 5.0 1. C198500200034 4.13 1.2 C198500200035 ENDDATA 7 0 C198500200036 ENDSUBENT 35 0 C198500299999 SUBENT C1985003 20130319 C130C198500300001 BIB 3 3 C198500300002 REACTION (79-AU-197(5-B-14,X)5-B-13,PAR,SIG) C198500300003 STATUS (TABLE) page 064609-5. C198500300004 SAMPLE 256 mg/cm2 Au target. C198500300005 ENDBIB 3 0 C198500300006 NOCOMMON 0 0 C198500300007 DATA 3 1 C198500300008 E-LVL DATA DATA-ERR C198500300009 MEV MB MB C198500300010 0.0 638.0 45.0 C198500300011 ENDDATA 3 0 C198500300012 ENDSUBENT 11 0 C198500399999 ENDENTRY 3 0 C198599999999