ENTRY C1058 20171113 C171C105800000001 SUBENT C1058001 20171113 C171C105800100001 BIB 11 36 C105800100002 TITLE Cross sections for the 26Mg(p,n)26gAl (7.3 x 10**5 yr) C105800100003 and 26Mg(p,n)26mAl (6.35 s) reactions C105800100004 AUTHOR (J.D.King,C.W.Cheng) C105800100005 REFERENCE (J,CJP,57,(2),286,1979) C105800100006 #doi:10.1139/p79-036 C105800100007 INSTITUTE (1CANTOR) C105800100008 FACILITY (VDGT,1CANMCM) The McMaster University FN Tandem C105800100009 accelerator. C105800100010 SAMPLE (12-MG-26,ENR=0.9946) The 26Mg target was prepared by C105800100011 evaporating magnesium metal enriched to 99.46% in C105800100012 26Mg to a 0.25 mm tantalum backing. The target C105800100013 thickness was determined to be 400+-40 microg/cm2 C105800100014 by the crystal oscillator method. An enriched 26Mg C105800100015 target was also deposited on to an aluminum backing C105800100016 at the same time as the tantalum-backed target was C105800100017 produced. The target thickness was taken to be C105800100018 395+-35 microg/cm2. C105800100019 DETECTOR (NAICR) Two 7.6 cm x 7.6 cm NaI(Tl) detectors were C105800100020 placed on either side of the target chamber at right C105800100021 angles to the beam line and surrounded by 2.5 cm of C105800100022 lead to reduce background. C105800100023 METHOD (ACTIV) C105800100024 ERR-ANALYS (ERR-T) Uncertainties in the measured cross-section C105800100025 values are due predominantly to the target thickness C105800100026 uncertainty of 8.9%. Errors due to statistical C105800100027 fluctuations, efficiency variations, and to the C105800100028 calculation of the correction factor for absorption C105800100029 in the tantalum are each of the order of 2% or less. C105800100030 The combined error is 9.1 or 9.2% in most yield C105800100031 determinations. C105800100032 (ERR-S) Statistical fluctuations. C105800100033 (ERR-1) Target thickness. C105800100034 (ERR-2) Efficiency variations. C105800100035 (ERR-3) Target absorption correction. C105800100036 DECAY-DATA (13-AL-26-M,6.35SEC,AR) C105800100037 HISTORY (20171113C) BP C105800100038 ENDBIB 36 0 C105800100039 COMMON 4 3 C105800100040 ERR-S ERR-1 ERR-2 ERR-3 C105800100041 PER-CENT PER-CENT PER-CENT PER-CENT C105800100042 2.0 8.9 2.0 2.0 C105800100043 ENDCOMMON 3 0 C105800100044 ENDSUBENT 43 0 C105800199999 SUBENT C1058002 20171113 C171C105800200001 BIB 2 2 C105800200002 REACTION (12-MG-26(P,N)13-AL-26-M,,SIG) C105800200003 STATUS (TABLE) Table 3, page 290. C105800200004 ENDBIB 2 0 C105800200005 NOCOMMON 0 0 C105800200006 DATA 3 28 C105800200007 EN DATA ERR-T C105800200008 MEV MB MB C105800200009 5.25 0.98 0.09 C105800200010 5.35 29.8 2.7 C105800200011 5.5 12.7 1.2 C105800200012 5.6 46.6 4.3 C105800200013 5.7 57.6 5.3 C105800200014 5.75 45.0 4.1 C105800200015 5.9 20.1 1.8 C105800200016 6.0 32.2 3.0 C105800200017 6.1 13.3 1.2 C105800200018 6.25 22.6 2.1 C105800200019 6.4 67.6 6.2 C105800200020 6.5 34.7 3.2 C105800200021 6.6 46.2 4.3 C105800200022 6.75 26.5 2.4 C105800200023 6.9 69.6 6.4 C105800200024 7.0 52.3 4.8 C105800200025 7.1 50.8 4.7 C105800200026 7.2 55.7 5.1 C105800200027 7.25 74.8 6.9 C105800200028 7.5 117.0 11.0 C105800200029 7.75 169.0 16.0 C105800200030 8.0 210.0 19.0 C105800200031 8.25 208.0 19.0 C105800200032 8.5 201.0 18.0 C105800200033 8.75 197.0 18.0 C105800200034 9.0 193.0 18.0 C105800200035 9.25 228.0 21.0 C105800200036 9.5 220.0 20.0 C105800200037 ENDDATA 30 0 C105800200038 ENDSUBENT 37 0 C105800299999 ENDENTRY 2 0 C105899999999