ENTRY 31674 20090819 31393167400000001 SUBENT 31674001 20090819 31393167400100001 BIB 12 38 3167400100002 TITLE Measurements of the (n,2n) reaction using the time 3167400100003 intervals spectroscopy technique. 3167400100004 AUTHOR (Ts.Ts.Panteleev,V.Semkova,N.Kamburov,A.Trifonov, 3167400100005 M.Mlkhailov,V.Yu.Konovalov,A.D.Rogov) 3167400100006 INSTITUTE (3BULBLA,4ZZZDUB) 3167400100007 REFERENCE ((S,ISINN-4,225,1996)=(S,JINR-E3-96-336,225,1996)) 3167400100008 FACILITY (ACCEL,3BULBLA) the SAMES 150D neutron generator. 3167400100009 DETECTOR (HE3SP) Two arrays of 3He proportional counters with 3167400100010 diameters 125 and 190 mm respectively, are imbedded 3167400100011 in a cylindrical polyethylene moderator 405 mm in 3167400100012 diam. and 420 mm in length, h, around a centra] hole 3167400100013 76 mm in diam.. The first array consists of six 10-atm 3167400100014 counters of the LND type and the second one - of twelve3167400100015 SNM-18 3-atm counters. Each counter is served by its 3167400100016 own preampiifier and discriminator. 3167400100017 The detector efficicncy in registering neutrons for 3167400100018 these two cases was 28.4+-0.6% and 34.2+-0.8%, 3167400100019 rcspectively. 3167400100020 (SIBAR) The flux of neutrons emitted by the Ti-T target3167400100021 of the neutron generator was measured by registering 3167400100022 particles with the Si-Au surface-bamer detector. 3167400100023 INC-SOURCE (D-T) The flux of neutrons emitted by the Ti-T target 3167400100024 METHOD (COINC) The experimental data on the number of double 3167400100025 neutron-neutron coincidences were obtained in the form 3167400100026 of spectra of time intervals between registration of 3167400100027 the first and second neutrons in pair. 3167400100028 ERR-ANALYS (ERR-S) Statistical uncertaities 3167400100029 CORRECTION Corrections for self-shidding in the samples were 3167400100030 determined from the total cross-section for neutron 3167400100031 interactions with the sample material; for all samples 3167400100032 they were far less than 1% and were not taken into 3167400100033 account. 3167400100034 STATUS (TABLE) Data fdrom the Table of the ref. 3167400100035 (APRVD) Entry approved by Dr. V.Yu.Konovalov 3167400100036 HISTORY (20090514C) SD 3167400100037 (20090710A) SD: units in DATA section at Subents: 3167400100038 002, 003 were changed on barns according 3167400100039 to author's confirmation. 3167400100040 ENDBIB 38 0 3167400100041 NOCOMMON 0 0 3167400100042 ENDSUBENT 41 0 3167400199999 SUBENT 31674002 20090819 31393167400200001 BIB 3 6 3167400200002 REACTION (72-HF-180(N,2N)72-HF-179,,SIG) 3167400200003 SAMPLE Two sets of measurements were carried out for 180Hf 3167400200004 Sample contained 5.376 g of HfO with 97% of the 180Hf 3167400200005 isotope. 3167400200006 HISTORY (20090710A) SD: units in DATA section were changed 3167400200007 on barns. 3167400200008 ENDBIB 6 0 3167400200009 NOCOMMON 0 0 3167400200010 DATA 3 1 3167400200011 EN DATA ERR-S 3167400200012 MEV B B 3167400200013 14.0 2.31 0.06 3167400200014 ENDDATA 3 0 3167400200015 ENDSUBENT 14 0 3167400299999 SUBENT 31674003 20090819 31393167400300001 BIB 3 6 3167400300002 REACTION (48-CD-114(N,2N)48-CD-113,,SIG) 3167400300003 SAMPLE One set of measurements was carried out for 114Cd. 3167400300004 The sample contained 1.706 g of metallic cadmium with 3167400300005 95% of isotope 114Cd. 3167400300006 HISTORY (20090710A) SD: units in DATA section were changed 3167400300007 on barns. 3167400300008 ENDBIB 6 0 3167400300009 NOCOMMON 0 0 3167400300010 DATA 3 1 3167400300011 EN DATA ERR-S 3167400300012 MEV B B 3167400300013 14.7 1.9 0.1 3167400300014 ENDDATA 3 0 3167400300015 ENDSUBENT 14 0 3167400399999 ENDENTRY 3 0 3167499999999