ENTRY 22721 20041222 00002272100000001 SUBENT 22721001 20041222 00002272100100001 BIB 13 38 2272100100002 TITLE Measurement of cross-sections for the Be-9(N,3N)Be-7 2272100100003 and Fe-56(N,P)Mn-56 reactions producing background 2272100100004 lines in gamma-ray astrophysics. 2272100100005 AUTHOR (P.DUHAMEL, W.GALSTER, J.S.GRAULICH, P.JEAN, P.LELEUX, 2272100100006 J.P.MEULDERS, J.VANHORENBEECK, G.VEDRENNE, 2272100100007 P.VON BALLMOOS) 2272100100008 INSTITUTE (2BLGBRU) 2272100100009 (2BLGLVN) 2272100100010 (2FR FR) Paul-Sabatier University, FRANCE 2272100100011 REFERENCE (J,NIM/A,404,143,1998) 2272100100012 HISTORY (20041213C) 2272100100013 (20041222U) Last checking has been done. 2272100100014 COMMENT *By authors*.Apart from the gamma-ray line integral in 2272100100015 the detector spectrum and the areal density of nuclei 2272100100016 in the sample, determination of cross-sections requires2272100100017 two additional quantities, I.E. The neutron integrated 2272100100018 intensity and the detector efficiency. 2272100100019 SAMPLE Samples were placed in the neutron beam, 2-m behind the2272100100020 exit of the collimator. In this position, the neutron 2272100100021 beam diameter is 3-cm and its intensity is 2*10e+6 2272100100022 neutrons-1 in the high-energy peak for an incident 2272100100023 10-mua proton beam. 2272100100024 Be-plates, purity more than 99.6% weight, of 5-mm 2272100100025 thickness and natural iron-plates of 3 and 4-mm 2272100100026 thickness were irradiated, for 8-Hr in the first case 2272100100027 abd 2-hr in the latter case. All plates have a surface 2272100100028 of 50*50-mm**2. 2272100100029 DETECTOR A 90% efficiency Ge-detector. 2272100100030 INC-SPECT *En-rsl-fw*.The energy resolution of the detector was 2272100100031 2-KeV fwhm for 511-KeV gamma-rays. 2272100100032 INC-SOURCE (P-LI7) Neutrons are produced by the Li-7(P,N) reaction2272100100033 on a natural Li-target of 3-mm thickness. 2272100100034 FACILITY (OLMS,2BLGLVN) 2272100100035 CORRECTION *By authors*.For each observable activity in a given 2272100100036 mass chain, peak area were corrected for detection 2272100100037 efficiency and decay branching of the corresponding 2272100100038 transitions in order to obtain the number of decay. 2272100100039 METHOD (BCINT) 2272100100040 ENDBIB 38 0 2272100100041 COMMON 1 3 2272100100042 EN-RSL-FW 2272100100043 KEV 2272100100044 2. 2272100100045 ENDCOMMON 3 0 2272100100046 ENDSUBENT 45 0 2272100199999 SUBENT 22721002 20041222 00002272100200001 BIB 5 14 2272100200002 REACTION (4-BE-9(N,3N)4-BE-7,,SIG) 2272100200003 RAD-DET (4-BE-7,DG) 2272100200004 DECAY-DATA (4-BE-7,53.3D,DG,478.) 2272100200005 ERR-ANALYS Error is indicated on figure contain statistical errors2272100200006 on the gamma-peak integral-less 8% and systematic error2272100200007 on the gamma-detector efficiency-5%, the proton beam 2272100200008 integration-5% and the Li-target thickness-5%. An 2272100200009 additional 10% uncertainty on the absolute scale 2272100200010 results from the uncertainty in the neutron production 2272100200011 cross-section. 2272100200012 (DATA-ERR).The error is reported by authors on fig. 2272100200013 (EN-ERR-DIG).Digitizing error of incident energy. 2272100200014 (EN-ERR).The error is reported by authors on figure. 2272100200015 STATUS (CURVE) Fig.4 2272100200016 ENDBIB 14 0 2272100200017 COMMON 1 3 2272100200018 EN-ERR-DIG 2272100200019 MEV 2272100200020 0.3 2272100200021 ENDCOMMON 3 0 2272100200022 DATA 4 5 2272100200023 EN EN-ERR DATA DATA-ERR 2272100200024 MEV MEV MB MB 2272100200025 28.7 1.2 0.541 2.6E-02 2272100200026 36.7 0.4 0.95 9.E-02 2272100200027 46.94 1.58 0.2 2272100200028 57.43 1.49 0.22 2272100200029 67.2 1.13 0.23 2272100200030 ENDDATA 7 0 2272100200031 ENDSUBENT 30 0 2272100299999 SUBENT 22721003 20041222 00002272100300001 BIB 5 7 2272100300002 REACTION (26-FE-56(N,P)25-MN-56,,SIG) 2272100300003 RAD-DET (25-MN-56,DG) 2272100300004 DECAY-DATA (25-MN-56,2.6HR,DG,847.,,DG,1811.) 2272100300005 ERR-ANALYS (ERR-DIG).Digitizing error of data. 2272100300006 (EN-ERR).The error of incident energy is reported 2272100300007 on figure. 2272100300008 STATUS (CURVE) Fig.5 2272100300009 ENDBIB 7 0 2272100300010 COMMON 2 3 2272100300011 EN-ERR ERR-DIG 2272100300012 MEV MB 2272100300013 1.4 0.7 2272100300014 ENDCOMMON 3 0 2272100300015 DATA 2 1 2272100300016 EN DATA 2272100300017 MEV MB 2272100300018 28.5 12.7 2272100300019 ENDDATA 3 0 2272100300020 ENDSUBENT 19 0 2272100399999 ENDENTRY 3 0 2272199999999