ENTRY 30249 20160708 31743024900000001 SUBENT 30249001 20160708 31743024900100001 BIB 13 21 3024900100002 INSTITUTE (3INDMUA) 3024900100003 REFERENCE (J,NP/A,205,614,1973) 3024900100004 AUTHOR (J.Alam,M.I.Sehgal) 3024900100005 TITLE Study of (n,alpha) reactions at thermal energies 3024900100006 FACILITY (REAC,3INDTRM) Thermal column of the TROMBAY 3024900100007 swimming-pool reactor 3024900100008 INC-SOURCE (THCOL) Thermal neutron flux of the order of 0.8X10E+8 3024900100009 n/cm2xsec 3024900100010 SAMPLE Powder form, sandwiched between two thin pieces of 3024900100011 cellotape. Sample purity better than 99.9 %. 3024900100012 METHOD (ACTIV) Activation technique 3024900100013 DETECTOR End-window beta-counter with window thickness of 3024900100014 1.5 millig/cm2. 3024900100015 PART-DET (B) Beta particles 3024900100016 HISTORY (19730709C) FM. 3024900100017 (20080423A) BIB section updated 3024900100018 (20160623U) VS. DECAY-DATA corrected in 002. 3024900100019 CORRECTION Corrections for the finite thickness of the target as 3024900100020 well as window thickness of beta counter were taken 3024900100021 into account in calculating the detection efficiency 3024900100022 STATUS (TABLE) Table 1 of Nucl.Phys.A205(1973)614 3024900100023 ENDBIB 21 0 3024900100024 COMMON 1 3 3024900100025 EN 3024900100026 EV 3024900100027 2.5300E-02 3024900100028 ENDCOMMON 3 0 3024900100029 ENDSUBENT 28 0 3024900199999 SUBENT 30249002 20160708 31743024900200001 BIB 7 14 3024900200002 REACTION ((72-HF-180(N,A)70-YB-177,,SIG)/ 3024900200003 (72-HF-180(N,G)72-HF-181,,SIG)) 3024900200004 SAMPLE Hafnium oxide powder 3024900200005 DECAY-DATA (70-YB-177-G,1.9HR) 3024900200006 (70-YB-177-M,6.5SEC) 3024900200007 (72-HF-181,43.D) 3024900200008 COMMENT In present case the (n,alpha) cross section includes 3024900200009 also the reaction Hf-180(n,a)Yb-177-ms 3024900200010 CORRECTION Decay curve of Yb-177 corrected for background activity3024900200011 due to Hf-181. 3024900200012 ERR-ANALYS (DATA-ERR) For errors involved in measuring the cross 3024900200013 section ratios see Sehgal (J. Pure and 3024900200014 Appl. Phys. 31,630,1957) 3024900200015 HISTORY (20160623U) VS. DECAY-DATA corrected. 3024900200016 ENDBIB 14 0 3024900200017 NOCOMMON 0 0 3024900200018 DATA 2 1 3024900200019 DATA DATA-ERR 3024900200020 NO-DIM NO-DIM 3024900200021 3.8500E-02 1.1000E-03 3024900200022 ENDDATA 3 0 3024900200023 ENDSUBENT 22 0 3024900299999 SUBENT 30249003 20081203 31323024900300001 BIB 4 9 3024900300002 REACTION ((81-TL-203(N,A)79-AU-200,,SIG)/ 3024900300003 (81-TL-205(N,G)81-TL-206,,SIG)) 3024900300004 DECAY-DATA (79-AU-200-G,48.MIN) 3024900300005 (81-TL-206-G,4.3MIN) 3024900300006 SAMPLE Thallous carbonate of 99.9 % purity 3024900300007 COMMENT Ratio given in data is only an upper limit because of 3024900300008 the impossibility of separation of the activity due to 3024900300009 the Tl-203(n,a)Au-200 reaction from that due to the 3024900300010 Tl-205(n,g) reaction 3024900300011 ENDBIB 9 0 3024900300012 NOCOMMON 0 0 3024900300013 DATA 1 1 3024900300014 DATA-MAX 3024900300015 NO-DIM 3024900300016 2.5000E-03 3024900300017 ENDDATA 3 0 3024900300018 ENDSUBENT 17 0 3024900399999 SUBENT 30249004 20081203 31323024900400001 BIB 4 9 3024900400002 REACTION ((82-PB-208(N,A)80-HG-205,,SIG)/ 3024900400003 (82-PB-208(N,G)82-PB-209,,SIG)) 3024900400004 SAMPLE Pure(99.9 %) lead metallic sheet 0.5 mm thick, 3024900400005 with 51.55 % natural abundance of Pb-208. 3024900400006 DECAY-DATA (80-HG-205,5.2MIN) obtained by subtracting the 3.3 hr 3024900400007 (82-PB-209,3.3HR) 3024900400008 ERR-ANALYS (DATA-ERR) For errors involved in measuring the cross 3024900400009 section ratios see Sehgal (J. Pure and 3024900400010 Appl. Phys. 31,630,1957) 3024900400011 ENDBIB 9 0 3024900400012 NOCOMMON 0 0 3024900400013 DATA 2 1 3024900400014 DATA DATA-ERR 3024900400015 NO-DIM NO-DIM 3024900400016 1.5400E-02 1.7000E-03 3024900400017 ENDDATA 3 0 3024900400018 ENDSUBENT 17 0 3024900499999 SUBENT 30249005 20081203 31323024900500001 BIB 4 9 3024900500002 REACTION ((83-BI-209(N,A)81-TL-206,,SIG)/ 3024900500003 (83-BI-209(N,G)83-BI-210,,SIG)) 3024900500004 SAMPLE Spectrographically pure Bi(2)O(3) powder 3024900500005 DECAY-DATA (81-TL-206-G,4.3MIN) obtained by subtracting the 5 days3024900500006 activity due to Bi-210 from the composite curve 3024900500007 (83-BI-210-G,5.D) 3024900500008 ERR-ANALYS (DATA-ERR) For errors involved in measuring the cross 3024900500009 section ratios see Sehgal (J. Pure and 3024900500010 Appl. Phys. 31,630,1957) 3024900500011 ENDBIB 9 0 3024900500012 NOCOMMON 0 0 3024900500013 DATA 2 1 3024900500014 DATA DATA-ERR 3024900500015 NO-DIM NO-DIM 3024900500016 4.4000E-03 4.0000E-04 3024900500017 ENDDATA 3 0 3024900500018 ENDSUBENT 17 0 3024900599999 ENDENTRY 5 0 3024999999999