ENTRY 30973 20090915 31413097300000001 SUBENT 30973001 20090915 31413097300100001 BIB 14 49 3097300100002 TITLE A measurement of the total cross section of the 3097300100003 capture reaction H-2(n,t)gamma at En = 25 MeV. 3097300100004 AUTHOR (J.Moesner,K.Moeller,W.Pilz,G.Schmidt,T.Stiehler) 3097300100005 INSTITUTE (3DDRROS) 3097300100006 REFERENCE (J,FBS,1,83,1986) 3097300100007 SAMPLE Gaseous deuterium target 10 mg/cm**2 3097300100008 FACILITY (VDGT,3DDRROS) 3097300100009 INC-SOURCE (D-T) A 25 MeV collimated beam of neutrons produced by 3097300100010 bombarding a Ti-T target with a 8 MeV pulsed deuteron 3097300100011 beam. 3097300100012 DETECTOR (COIN,MWPC,MWPC,TELES) 3097300100013 (TELES,SCIN,SCIN) 3097300100014 Two MWPC's, one placed behind the entrance- and one 3097300100015 before the exit-window of the deuterium gas cell, pro- 3097300100016 vided anticoincidence and coincidence signals respec- 3097300100017 tively to the telescope scintillators as to ensure 3097300100018 that all signals have their origin within the gas cell.3097300100019 The distance (flight path) between the two telescope 3097300100020 scintillation counters (delta-E and stop-detector) was 3097300100021 42.3 cm. 3097300100022 METHOD (TOF,EDE) The tritons are distinguished from other 3097300100023 particles by time-of flight between both scintillator 3097300100024 detectors and by the energy deposit in the stop- 3097300100025 detector. 3097300100026 MONITOR In order to separate the 25 MeV neutrons from the 3097300100027 prompt gamma-rays and the continuum part of the neutron3097300100028 spectrum the time between the signal of the pulsing 3097300100029 system and that of the delta-E-scintillator was 3097300100030 measured. By setting a time window the 25 MeV neutrons 3097300100031 were selected. 3097300100032 ANALYSIS The area of the tritons in the TOF versus energy spec- 3097300100033 trum overlaps sligthly that of the deuterons. In order 3097300100034 to evaluate the number of measured tritons the events 3097300100035 of equal-time distance to the deuteron band were 3097300100036 summed up. The number of tritons was evaluated from 3097300100037 a 6-parameter fit for the resulting triton and deu- 3097300100038 teron distributions. 3097300100039 ERR-ANALYS (ERR-T) The error is evaluated from the 3097300100040 uncertainties of: 3097300100041 (ERR-1) No.of tritons (+-8.9%), 3097300100042 (ERR-2) No.of deuterons (+-2.3%) and 3097300100043 (ERR-3) The ratio of the efficiencies for registrating 3097300100044 elastically scattered deuterons and 3097300100045 captured tritons (+-2%). 3097300100046 STATUS (TABLE) Data are taken from the text of J,FBS,1,83,86. 3097300100047 HISTORY (19920129C) HW 3097300100048 (20090912A) SD:Updated to new date formats,lower case. 3097300100049 COMMON section and codes for partial uncertainties 3097300100050 were added 3097300100051 ENDBIB 49 0 3097300100052 COMMON 3 3 3097300100053 ERR-1 ERR-2 ERR-3 3097300100054 PER-CENT PER-CENT PER-CENT 3097300100055 8.9 2.3 2. 3097300100056 ENDCOMMON 3 0 3097300100057 ENDSUBENT 56 0 3097300199999 SUBENT 30973002 20090915 31413097300200001 BIB 1 1 3097300200002 REACTION (1-H-2(N,G)1-H-3,,SIG) 3097300200003 ENDBIB 1 0 3097300200004 COMMON 1 3 3097300200005 EN 3097300200006 MEV 3097300200007 25. 3097300200008 ENDCOMMON 3 0 3097300200009 DATA 2 1 3097300200010 DATA ERR-T 3097300200011 MICRO-B MICRO-B 3097300200012 7.6 .8 3097300200013 ENDDATA 3 0 3097300200014 ENDSUBENT 13 0 3097300299999 ENDENTRY 2 0 3097399999999