ENTRY O0450 20151202 O056O045000000001 SUBENT O0450001 20151202 O056O045000100001 BIB 17 76 O045000100002 TITLE Excitation function and integral recoil properties of O045000100003 the Cu-65(p,p+pip)Ni-65 reaction. O045000100004 AUTHOR (L.P.Remsberg) O045000100005 INSTITUTE (1USABNL) O045000100006 REFERENCE (J,PR,138,B572,1965) O045000100007 REL-REF (M,C0269001,L.P.Remsberg+,J,PR,130,2069,1963) - O045000100008 annihilation coincidence method. O045000100009 SAMPLE Three types of targets were used. The targets for whichO045000100010 the beam intensity was monitored consisted of a Cu O045000100011 target foil, a 0.001-inch Al monitor foil and two or O045000100012 three aluminum guard foils. O045000100013 The foils for the cosmotron targets were aligned with O045000100014 shears prior to irradiation except for one guard foil O045000100015 which protruded 0.5-1 mm beyond the leading edge of theO045000100016 aligned foils. Alignment of the foils in the monitored O045000100017 ags targets was achieved by punching a 7/16-inch-diam. O045000100018 Circle through the foil stack about 1 mm back from the O045000100019 leading edge after irradiation. O045000100020 When only the sigma (Ni-65)/sigma (Ni-57) was to be O045000100021 measured, the target consisted of a Cu foil and two Al O045000100022 guard foils. O045000100023 The targets for the recoil measurements consisted of aO045000100024 Cu target foil, two 0.00025-inch Mylar catcher foils, O045000100025 one 0.00025-inch Mylar foils for an activation blank O045000100026 and two 0.00025-inch Mylar guard foils. O045000100027 All of the Cu targets from which cross sections for O045000100028 the production of Ni-65 were measured, either directly O045000100029 or relative to the cross section for Ni-57, were taken O045000100030 from the same stock of 0.00033-inch Cu foil whose O045000100031 purity was greater than 99.99%. The thicker targets O045000100032 were made up of several layers of this foil. O045000100033 ADD-RES (COMP) The one-pion-exchange theory. O045000100034 (RANGE) O045000100035 Results of individual experiments for cross sections O045000100036 and effective recoil ranges. O045000100037 FACILITY (SYNCY,1USABNL) The cosmotron. O045000100038 DETECTOR (PROPC) End-window, methane-flow (Ni-57 and Ni-65) and O045000100039 argon-methane-flow (Na-24) proportional counters. The O045000100040 calibration of the detector for Ni-57 was performed O045000100041 with the positron annihilation coincidence method with O045000100042 the number of positrons per decay taken to be 0.47. O045000100043 The Ni-65 calibration was based on standards whose O045000100044 disintegration rates were determined in a 4-pi beta- O045000100045 counter. The disintegration rates of Na-24 in the O045000100046 aluminum monitor foils were determined with end-window,O045000100047 argon-methane-flow proportional counters which had beenO045000100048 calibrated for Na-24 in 0.001-inch Al foil by the O045000100049 beta-gamma coincidence method. O045000100050 METHOD (CHSEP) O045000100051 (INTB) O045000100052 (COINC) O045000100053 ANALYSIS (DECAY) To resolve the Ni decay curves into 2.58 hours O045000100054 and 36 hours components O045000100055 MONITOR ((MONIT)13-AL-27(P,X)11-NA-24,CUM,SIG) O045000100056 MONIT-REF (B0022003,J.B.Cumming,J,ARN,13,261,1963) O045000100057 ERR-ANALYS (ERR-T) The standard deviations were obtained from rms O045000100058 combinations of: O045000100059 (MONIT-ERR) uncertainty of the monitor cross sections, O045000100060 (ERR-1) uncertainty of the Na-24 counting efficiency, O045000100061 (ERR-S) uncertainty of the counting efficiencies of O045000100062 each of the Ni isotopes, O045000100063 (ERR-2,1.,3.) uncertainty of secondary corrections O045000100064 (ERR-3) uncertainty of chemical yields, monitoring O045000100065 technique and counter variations. O045000100066 The 12% uncertainty in the positron branching ratio forO045000100067 Ni-57 was not included in the error estimated for the O045000100068 Ni-57 cross sections. O045000100069 CORRECTION Production cross section of Ni-65 was corrected on O045000100070 Cu-65(n,p)Ni-65 reaction. O045000100071 STATUS (TABLE) Tbl.III from PR,138,B572,1965 O045000100072 HISTORY (19980902C) O045000100073 (20040630A) Reference is corrected. Updated too O045000100074 (20071128A).Ref. PR,B138,572,1965 -> PR,138,B572,1965 O045000100075 as it coded in Phys.Rev. O045000100076 (20151202A) SD: DECAY-DATA corrected in Subent 002. O045000100077 ERR-ANALYS update. One ref. moved to REL-REF. O045000100078 ENDBIB 76 0 O045000100079 COMMON 4 3 O045000100080 MONIT-ERR ERR-1 ERR-S ERR-3 O045000100081 PER-CENT PER-CENT PER-CENT PER-CENT O045000100082 7. 2. 3. 5. O045000100083 ENDCOMMON 3 0 O045000100084 ENDSUBENT 83 0 O045000199999 SUBENT O0450002 20151202 O056O045000200001 BIB 5 17 O045000200002 REACTION 1(29-CU-65(P,PIP+P)28-NI-65,,SIG) Table 3. O045000200003 The sigma (Ni-65) values were calculated from the Cu-65O045000200004 content of the targets. O045000200005 2(29-CU-0(P,X)28-NI-57,,SIG) O045000200006 The sigma (Ni-57) values were calculated from the totalO045000200007 Cu in the targets. O045000200008 DECAY-DATA1(28-NI-65,2.58HR) O045000200009 2(28-NI-57,36.0HR,B+,,0.47) According to ENSDF, the O045000200010 number of positrons per decay is 0.436+-0.014. O045000200011 (Comment by compiler). O045000200012 COMMENT -By authors- the impurities contribute less than 1 O045000200013 mu-barn to the production of Ni-65 in the copper foil O045000200014 used. O045000200015 REL-REF (A,C0281003,S.C.Fung+,J,PR,95,176,1954) O045000200016 (A,O0497002,V.P.Crespo,J,RPQ,5,6,1963) O045000200017 HISTORY (20151202A) SD: 36.0hr -> 2.58hr in DECAY-DATA (1) and O045000200018 2.58hr -> 36.0hr in DECAY-DATA (2). O045000200019 ENDBIB 17 0 O045000200020 NOCOMMON 0 0 O045000200021 DATA 6 7 O045000200022 EN DATA 1ERR-T 1DATA 2ERR-T 2MONIT O045000200023 GEV MB MB MB MB MB O045000200024 0.49 0.137 0.012 1.3 0.12 10.8O045000200025 0.65 0.203 0.018 1.13 0.1 10.8O045000200026 1. 0.227 0.02 0.821 0.074 10.5O045000200027 1.4 0.231 0.02 0.729 0.066 10.O045000200028 2. 0.203 0.018 0.655 0.059 9.5O045000200029 2.8 0.16 0.014 0.594 0.053 9.2O045000200030 28. 0.093 0.008 0.5 0.045 8.6O045000200031 ENDDATA 9 0 O045000200032 ENDSUBENT 31 0 O045000299999 ENDENTRY 2 0 O045099999999