ENTRY C1091 20170919 C170C109100000001 SUBENT C1091001 20170919 C170C109100100001 BIB 9 15 C109100100002 TITLE A recoil study of the 209Bi(alpha,p)212m,gPo C109100100003 reaction mechanism C109100100004 AUTHOR (E.T.Chulick,J.B.Natowitz) C109100100005 REFERENCE (J,NP/A,173,487,1971) C109100100006 #doi:10.1016/0375-9474(71)90966-3 C109100100007 INSTITUTE (1USATAM) C109100100008 FACILITY (CYCLO,1USATAM) C109100100009 DETECTOR (SIBAR) alpha detector. C109100100010 ERR-ANALYS (ERR-S) Counting statistics. C109100100011 (ERR-SYS,10.,15.) 10-15% error due to systematic C109100100012 errors is more realistic than counting statistics. C109100100013 COMMENT For some energies, several competing results are C109100100014 given without explanation, probably they are just C109100100015 from different experimental runs. C109100100016 HISTORY (20170919C) BP C109100100017 ENDBIB 15 0 C109100100018 NOCOMMON 0 0 C109100100019 ENDSUBENT 18 0 C109100199999 SUBENT C1091002 20170925 C170C109100200001 BIB 5 22 C109100200002 REACTION (83-BI-209(A,P)84-PO-212-M,,SIG) C109100200003 SAMPLE For these runs targets were ~25 microg/cm2 of Bi on C109100200004 aluminum leaf backing. C109100200005 METHOD (REC) Angular distributions of 212mPo were determined C109100200006 using two different methods. In the first method a C109100200007 thin ~5-10 microg/cm2 Al leaf backed target was C109100200008 placed 2.5 cm from an Al leaf catcher foil. A C109100200009 collimator in front of the catcher foil allowed us to C109100200010 select 2 degrees increments of recoils from the C109100200011 target. In the second method a position sensitive C109100200012 detector was used to determine the recoil C109100200013 distributions of 212mPo. The target was irradiated C109100200014 for a pre-determined interval. After the irradiation C109100200015 the catcher was moved in front of a position-sensitive C109100200016 detector. Position signals from the detector in C109100200017 coincidence with certain alpha-particle energy groups C109100200018 were either stored directly in a pulse-height C109100200019 analyzer or divided by the corresponding cc-particle C109100200020 energy signal and the quotient then stored in the C109100200021 pulse-height analyzer. C109100200022 DECAY-DATA (84-PO-212-M,45.1SEC) C109100200023 STATUS (TABLE) Table 1, page 491. C109100200024 ENDBIB 22 0 C109100200025 NOCOMMON 0 0 C109100200026 DATA 3 19 C109100200027 EN DATA ERR-S C109100200028 MEV MICRO-B MICRO-B C109100200029 26.5 3.03 1.91 C109100200030 30.3 32.7 1.2 C109100200031 33.5 148.0 2.0 C109100200032 34.4 213.0 4.0 C109100200033 38.8 219.0 4.0 C109100200034 39.8 280.0 4.0 C109100200035 44.1 284.0 4.0 C109100200036 46.4 251.0 7.0 C109100200037 46.4 242.0 4.0 C109100200038 49.0 289.0 4.0 C109100200039 49.4 227.0 6.0 C109100200040 54.2 188.0 10.0 C109100200041 54.2 208.0 5.0 C109100200042 59.2 159.0 5.0 C109100200043 59.2 155.0 2.0 C109100200044 59.2 147.0 6.0 C109100200045 59.2 114.0 11.0 C109100200046 59.2 139.0 2.0 C109100200047 59.2 153.0 6.0 C109100200048 ENDDATA 21 0 C109100200049 ENDSUBENT 48 0 C109100299999 SUBENT C1091003 20170925 C170C109100300001 BIB 5 9 C109100300002 REACTION (83-BI-209(A,P)84-PO-212-G,,SIG) C109100300003 SAMPLE ~100 microg/cm2 Bi target on a 200 microg/cm2 Al C109100300004 backing. C109100300005 METHOD (REC) In this geometry, recoiling 212gPo nuclei were C109100300006 stopped in the backing foil. The cross section for C109100300007 212gPo was determined from the observed alpha- C109100300008 activity. C109100300009 DECAY-DATA (84-PO-212-G,304.NSEC) C109100300010 STATUS (TABLE) Table 1, page 491. C109100300011 ENDBIB 9 0 C109100300012 NOCOMMON 0 0 C109100300013 DATA 3 6 C109100300014 EN DATA ERR-S C109100300015 MEV MB MB C109100300016 35.0 5.43 0.41 C109100300017 35.0 4.58 0.43 C109100300018 40.0 4.52 0.54 C109100300019 50.0 3.48 0.31 C109100300020 60.0 1.41 0.31 C109100300021 60.0 1.40 0.13 C109100300022 ENDDATA 8 0 C109100300023 ENDSUBENT 22 0 C109100399999 SUBENT C1091004 20170925 C170C109100400001 BIB 2 2 C109100400002 REACTION (83-BI-209(A,X)84-PO-211-M,,SIG) C109100400003 STATUS (TABLE) Table 1, page 491. C109100400004 ENDBIB 2 0 C109100400005 NOCOMMON 0 0 C109100400006 DATA 3 18 C109100400007 EN DATA ERR-S C109100400008 MEV MB MB C109100400009 30.5 0.102 0.015 C109100400010 33.5 0.976 0.088 C109100400011 34.4 1.73 0.09 C109100400012 38.8 3.84 0.13 C109100400013 39.8 4.63 0.09 C109100400014 44.1 6.91 0.29 C109100400015 46.4 6.34 0.06 C109100400016 46.4 6.34 0.08 C109100400017 49.0 7.97 0.13 C109100400018 49.4 6.29 0.19 C109100400019 54.2 5.50 0.24 C109100400020 54.2 6.24 0.14 C109100400021 59.2 4.93 0.10 C109100400022 59.2 4.91 0.13 C109100400023 59.2 4.80 0.16 C109100400024 59.2 4.24 0.34 C109100400025 59.2 4.64 0.09 C109100400026 59.2 4.95 0.23 C109100400027 ENDDATA 20 0 C109100400028 ENDSUBENT 27 0 C109100499999 SUBENT C1091005 20170925 C170C109100500001 BIB 2 4 C109100500002 REACTION (83-BI-209(A,P)84-PO-212-M/G,,SIG/RAT) C109100500003 STATUS (TABLE) Table 1, page 491. C109100500004 (DEP,C1091002) C109100500005 (DEP,C1091003) C109100500006 ENDBIB 4 0 C109100500007 NOCOMMON 0 0 C109100500008 DATA 3 4 C109100500009 EN DATA ERR-S C109100500010 MEV NO-DIM NO-DIM C109100500011 35.0 0.0390 0.0050 C109100500012 40.0 0.0618 0.007 C109100500013 50.0 0.0652 0.006 C109100500014 60.0 0.0922 0.023 C109100500015 ENDDATA 6 0 C109100500016 ENDSUBENT 15 0 C109100599999 ENDENTRY 5 0 C109199999999