ENTRY 32103 20100924 31473210300000001 SUBENT 32103001 20100924 31473210300100001 BIB 11 23 3210300100002 TITLE Investigation of Be-7(n,p)Li-7 reaction 3210300100003 AUTHOR (J.Cervena,V.Havranek,V.Hnatowicz,J.Kvitek,A.Mastalka, 3210300100004 J.Vacik) 3210300100005 INSTITUTE (3CZRUJF) 3210300100006 REFERENCE (J,CZJ/B,39,1263,198911) 3210300100007 SAMPLE Be-7 sample was prepared from 0.1 micro-g/micro-l 3210300100008 solution of Be-7Cl in diluted HCl. Solution was drop- 3210300100009 deposited onto a 4 micro-m thick policarbon foil. 3210300100010 Sample was covered by a very thin polyvinyl cloride 3210300100011 film in order to prevent activity losses. Total number 3210300100012 of Be-7 atoms was determined by measuring the intensity3210300100013 of 477.6 keV gamma rays. 3210300100014 MONITOR (3-LI-6(N,T)2-HE-4,,SIG) 3210300100015 FACILITY (REAC,3CZRUJF) VVR-S research reactor 3210300100016 METHOD (EDE) Directly measurement of protons from 3210300100017 Be-7(n,p) reaction 3210300100018 DETECTOR (TELES,SI,SI) Two silicon detectors 3210300100019 STATUS (TABLE) Data taken from Czech.J.Phys.,B39(1989) p.1263,3210300100020 from text. 3210300100021 HISTORY (19891214C) DG.- Corrections by VOF 3210300100022 (19930223U) HW.-Secondary energies coded in subent. 0033210300100023 (20100923A) SD:Updated to new date formats,lower case. 3210300100024 Cosmetic changes and corrections. 3210300100025 ENDBIB 23 0 3210300100026 NOCOMMON 0 0 3210300100027 ENDSUBENT 26 0 3210300199999 SUBENT 32103002 20100924 31473210300200001 BIB 3 13 3210300200002 REACTION (4-BE-7(N,P)3-LI-7,,SIG,,MXW) 3210300200003 INC-SPECT 300 mm long silicon monocrystalline filter enclosed in 3210300200004 a lead collimator was used to suppress fast neutron 3210300200005 admixture to a thermal neutron beam. 3210300200006 The flux of thermal neutrons with Maxwell-Boltzmann 3210300200007 energy distribution was (l.56 +- 0.08) x 10**8 /cm2/s 3210300200008 ERR-ANALYS (ERR-T) Given error (standard deviation) was due to: 3210300200009 (ERR-S) statistical error (1%) and several 3210300200010 systematic errors among which the most important are: 3210300200011 (ERR-1) uncertainty in the number of Be-7 atoms (5%), 3210300200012 (ERR-2) uncertainty in the number of Li-6 atoms (5%), 3210300200013 (ERR-3) uncertain knowledge of measuring geometry 3210300200014 and possible variation of neutron flux (5%). 3210300200015 ENDBIB 13 0 3210300200016 COMMON 4 3 3210300200017 ERR-1 ERR-2 ERR-3 ERR-S 3210300200018 PER-CENT PER-CENT PER-CENT PER-CENT 3210300200019 5. 5. 5. 1. 3210300200020 ENDCOMMON 3 0 3210300200021 DATA 3 1 3210300200022 EN-MEAN DATA ERR-T 3210300200023 EV B B 3210300200024 0.0253 46800. 4000. 3210300200025 ENDDATA 3 0 3210300200026 ENDSUBENT 25 0 3210300299999 SUBENT 32103003 20100924 31473210300300001 BIB 5 19 3210300300002 REACTION ((4-BE-7(N,P)3-LI-7,PAR,SIG,,MXW)/ 3210300300003 (4-BE-7(N,P)3-LI-7,PAR,SIG,,MXW)) 3210300300004 Ratio of the partial cross section for proton group(p1)3210300300005 with Ep 1.02 MeV to proton group(p0) with Ep 1.44 MeV. 3210300300006 INC-SPECT 300 mm long silicon monocrystalline filter enclosed in 3210300300007 a lead collimator was used to suppress fast neutron 3210300300008 admixture to a thermal neutron beam. 3210300300009 The flux of thermal neutrons with Maxwell-Boltzmann 3210300300010 energy distribution was (l.56 +- 0.08) x 10**8 /cm2/s 3210300300011 EN-SEC (E-NM,P) Energy of outgoing proton group p(1) 3210300300012 (E-DN,P) energy of outgoing proton group p(0) 3210300300013 ERR-ANALYS (ERR-T) Given error (standard deviation) was due to: 3210300300014 (ERR-S) statistical error (1%) and several 3210300300015 systematic errors among which the most important are: 3210300300016 (ERR-1) uncertainty in the number of Be-7 atoms (5%), 3210300300017 (ERR-2) uncertainty in the number of Li-6 atoms (5%), 3210300300018 (ERR-3) uncertain knowledge of measuring geometry 3210300300019 and possible variation of neutron flux (5%). 3210300300020 HISTORY (19930223U) Hw.- Secondary proton energies coded.- 3210300300021 ENDBIB 19 0 3210300300022 COMMON 4 3 3210300300023 ERR-1 ERR-2 ERR-3 ERR-S 3210300300024 PER-CENT PER-CENT PER-CENT PER-CENT 3210300300025 5. 5. 5. 1. 3210300300026 ENDCOMMON 3 0 3210300300027 DATA 5 1 3210300300028 EN-MEAN E-NM E-DN DATA ERR-T 3210300300029 EV MEV MEV NO-DIM NO-DIM 3210300300030 0.0253 1.02 1.44 0.02 0.00 3210300300031 ENDDATA 3 0 3210300300032 ENDSUBENT 31 0 3210300399999 SUBENT 32103004 20100924 31473210300400001 BIB 3 10 3210300400002 REACTION (4-BE-7(N,P)3-LI-7,,SIG,,SPA) 3210300400003 INC-SPECT 2 keV neutron beam was obtained using the 600 mm long 3210300400004 filter of pure metallic scandium inserted into the lead3210300400005 collimator. 3210300400006 The flux of neutrons with 2 keV mean energy and energy 3210300400007 spread of about 900 eV was (2.4 +- 0.4) x 10**6 /cm2/s 3210300400008 COMMENT Author's comment 3210300400009 the proton spectrum had very low statistics and it was 3210300400010 almost structure-less. Therefore only an upper limit of3210300400011 total reaction cross section was determined. 3210300400012 ENDBIB 10 0 3210300400013 NOCOMMON 0 0 3210300400014 DATA 2 1 3210300400015 EN-MEAN DATA-MAX 3210300400016 KEV B 3210300400017 2. 540. 3210300400018 ENDDATA 3 0 3210300400019 ENDSUBENT 18 0 3210300499999 ENDENTRY 4 0 3210399999999