ENTRY 33061 20140425 31643306100000001 SUBENT 33061001 20140425 31643306100100001 BIB 11 24 3306100100002 TITLE Angular distribution of the 19F(n,a)16N reaction at En 3306100100003 = 4.7 MeV 3306100100004 AUTHOR (S.M.Bharathi, U.T.Raheja, E.Kondaiah) 3306100100005 INSTITUTE (3INDTAT) 3306100100006 REFERENCE (J,NP,83,407,1966) 3306100100007 PART-DET (A) 3306100100008 INC-SOURCE (P-T) 5.5 MeV protons on titanium-tritium 3306100100009 SAMPLE Physical-form of target is solid. (A teflon ribbon of 3306100100010 20 mg/cm2 thickness was used as the target of 3306100100011 fluorine.) 3306100100012 METHOD (COINC) The pulse-height spectrum of alphas from the 3306100100013 counter near the source, gated by the coincidence 3306100100014 pulse derived from both the counters, was recorded on 3306100100015 a TMC 400-channelanalyser. 3306100100016 FACILITY (VDG,3INDTRM) 3306100100017 DETECTOR Calibration: The spectrometer was calibrated using an 3306100100018 241Am alpha source. 3306100100019 (TELES,PROPC,PROPC) The counter telescope consist of 3306100100020 two proportional counters filled with 95 % of krypton 3306100100021 and 5% of CO2 at a pressure of 2 cm of Hg. 3306100100022 (SCIN) Neutrons were monitored by a glycyryl borate 3306100100023 plastic plus Zns scintillator-photomultiplier 3306100100024 assembly, which is insensitive to gamma rays. 3306100100025 HISTORY (20140423C) BL 3306100100026 ENDBIB 24 0 3306100100027 COMMON 2 3 3306100100028 EN EN-RSL 3306100100029 MEV MEV 3306100100030 4.7 0.05 3306100100031 ENDCOMMON 3 0 3306100100032 ENDSUBENT 31 0 3306100199999 SUBENT 33061002 20140425 31643306100200001 BIB 8 21 3306100200002 REACTION (9-F-19(N,A)7-N-16,,DA) 3306100200003 MONITOR (1-H-1(N,EL)1-H-1,,DA,P) 3306100200004 MONIT-REF (,J.L.Fowler+,J,RMP,28,103,1956) 3306100200005 EN-SEC ANG-CM is polar angle (c.m.) between beam and alpha 3306100200006 ANALYSIS The 0 degree yield of alphas from fluorine has been 3306100200007 compared with the 0 degree recoil proton yield from 3306100200008 alkathene for which the differential cross section is 3306100200009 reported by Fowler and Brolley as 530 mb/sr. With a 3306100200010 knowledge of the effective thicknesses of the 3306100200011 alkathene and teflon targets and hence the number of 3306100200012 hydrogen and fluorine atoms, sigma(0 degree) for 3306100200013 fluorine alphas has been computed. 3306100200014 ERR-ANALYS (DATA-ERR) The error in the cross section comprises 3306100200015 the counting statistics, the finite angular aperture 3306100200016 which varies from 16 to 4 degree at scattering angles 3306100200017 from 0 to 180 degree, the large uncertainty in the 3306100200018 effective fluorine target thickness particularly at 3306100200019 low alpha energies. 3306100200020 FLAG (1.) Numerical data for 0 degree presented by authors 3306100200021 in the text of the article. 3306100200022 STATUS (CURVE) Fig.4 of Nucl.Phys.83(1966)407 3306100200023 ENDBIB 21 0 3306100200024 COMMON 2 3 3306100200025 ANG-NRM MONIT 3306100200026 ADEG MB/SR 3306100200027 0. 530. 3306100200028 ENDCOMMON 3 0 3306100200029 DATA 4 10 3306100200030 ANG-CM DATA-CM DATA-ERR FLAG 3306100200031 ADEG MB/SR MB/SR NO-DIM 3306100200032 0. 25. 5. 1. 3306100200033 17.207 19.568 5.931 3306100200034 34.254 27.008 6.110 3306100200035 50.188 21.084 5.931 3306100200036 66.706 17.126 4.038 3306100200037 82.816 18.527 5.253 3306100200038 110.740 14.503 4.859 3306100200039 125.781 8.757 3.502 3306100200040 140.686 21.520 6.968 3306100200041 153.512 11.879 8.968 3306100200042 ENDDATA 12 0 3306100200043 ENDSUBENT 42 0 3306100299999 SUBENT 33061003 20140425 31643306100300001 BIB 4 5 3306100300002 REACTION (9-F-19(N,A)7-N-16,,SIG) 3306100300003 ANALYSIS (INTAD) 3306100300004 ERR-ANALYS (DATA-ERR) No information on source of uncertainties 3306100300005 STATUS (TABLE) Text (p411) of Nucl.Phys.83(1966)407 3306100300006 (DEP,33061002) angular distribution given. 3306100300007 ENDBIB 5 0 3306100300008 NOCOMMON 0 0 3306100300009 DATA 2 1 3306100300010 DATA DATA-ERR 3306100300011 MB MB 3306100300012 175. 18. 3306100300013 ENDDATA 3 0 3306100300014 ENDSUBENT 13 0 3306100399999 SUBENT 33061004 20140425 31643306100400001 BIB 4 6 3306100400002 REACTION (9-F-19(N,A)7-N-16,,DA,,LEG/RS) 3306100400003 ANALYSIS Angular distribution is fitted with a first-order 3306100400004 Legendre polynomial a0 + a1*p1(cos(theta)) 3306100400005 ERR-ANALYS (DATA-ERR) No information on source of uncertainties 3306100400006 STATUS (TABLE) Abstract of Nucl.Phys.83(1966)407 3306100400007 (DEP,33061002) Angular distribution given. 3306100400008 ENDBIB 6 0 3306100400009 NOCOMMON 0 0 3306100400010 DATA 3 2 3306100400011 NUMBER-CM DATA-CM DATA-ERR 3306100400012 NO-DIM NO-DIM NO-DIM 3306100400013 0. 1. 0.1 3306100400014 1. 0.40 0.15 3306100400015 ENDDATA 4 0 3306100400016 ENDSUBENT 15 0 3306100499999 ENDENTRY 4 0 3306199999999