ENTRY O1854 20101007 O044O185400000001 SUBENT O1854001 20101007 O044O185400100001 BIB 9 34 O185400100002 TITLE New experimental study of low-energy (p,g) resonances O185400100003 in magnesium isotopes. O185400100004 AUTHOR (B.Limata, F.Strieder, A.Formicola, G.Imbriani, O185400100005 M.Junker, H.W.Becker, D.Bemmerer, A.Best, R.Bonetti, O185400100006 C.Broggini, A.Caciolli, P.Corvisiero, H.Costantini, O185400100007 A.DiLeva, Z.Elekes, Z.Fueloep, G.Gervino, O185400100008 A.Guglielmetti, C.Gustavino, Gy.Gyuerky, A.Lemut, O185400100009 M.Marta, C.Mazzocchi, R.Menegazzo, P.Prati, V.Roca, O185400100010 C.Rolfs, C.R.Alvarez, C.Salvo, E.Somorjai, O.Straniero,O185400100011 F.Terrasi, H.P.Trautvetter) O185400100012 INSTITUTE (2ITYNAP) O185400100013 (2GERBOC) Institute of Experimental.physics and O185400100014 Fakult. of physics and astronomy, Ruhr-Universit. O185400100015 at Bochum, D-44780 Bochum, Germany O185400100016 (2ITYLGS) O185400100017 (2GERDRE) O185400100018 (2ITYMIL) O185400100019 (2ITYPAD) O185400100020 (2ITYGVA) O185400100021 (3HUNDEB) O185400100022 (2ITYTUR) O185400100023 (2ITYOAC) O185400100024 (2ITYFSN) O185400100025 REFERENCE (J,PR/C,82,015801,2010) O185400100026 REL-REF (I,,C.Casella+,J,NIM/A,489,160,2002) BGO detection O185400100027 system. O185400100028 FACILITY (ACCEL,2ITYLGS) The 400 kV LUNA accelerator. O185400100029 METHOD (BCINT) O185400100030 (AMS) O185400100031 COMMENT *By authors*.The effective energy E was determined fromO185400100032 the centroids of the gamma lines for capture to the O185400100033 ground state and to the 6792 keV state and leads to O185400100034 2.0-2.4% uncertainty. O185400100035 HISTORY (20101007C) S.B O185400100036 ENDBIB 34 0 O185400100037 NOCOMMON 0 0 O185400100038 ENDSUBENT 37 0 O185400199999 SUBENT O1854002 20101118 O044O185400200001 BIB 7 21 O185400200002 REACTION ((12-MG-24(P,G),PAR,WID)/(12-MG-24(P,G),,WID)) O185400200003 EN-SEC (E-LVL,13-AL-25) O185400200004 SAMPLE A natural Mg target has been produced by evaporation ofO185400200005 metallic magnesium of natural isotopic composition on O185400200006 a Ta-backing.The Mg target on Ta has been cut into two O185400200007 pieces for the HPGe detector and the BGO crystal O185400200008 measurement, respectively O185400200009 STATUS (TABLE) table 1 of J,PR/C,82,015801,2010 O185400200010 METHOD (GSPEC) O185400200011 DETECTOR (HPGE).A HPGe detector (11.5% relative efficiency, O185400200012 resolution=2.1 keV at E(g)=1.3 MeV) was placed on O185400200013 another movable carriage oriented at 55 degree with O185400200014 respect to the beam axis. O185400200015 ERR-ANALYS (DATA-ERR).At HPGe measurements-The uncertainty takes O185400200016 into account the statistical error and a 3.5% error forO185400200017 the efficiency. O185400200018 At BGO measurements -The uncertainty takes into accountO185400200019 the background correction, decay scheme uncertainties O185400200020 and an error for the simulation. O185400200021 Weighted mean-Common uncertainties- for stopping power O185400200022 and charge integration are added quadratically. O185400200023 ENDBIB 21 0 O185400200024 COMMON 1 3 O185400200025 EN-RES O185400200026 KEV O185400200027 214. O185400200028 ENDCOMMON 3 0 O185400200029 DATA 4 5 O185400200030 E-LVL DATA DATA-ERR DATA-MAX O185400200031 KEV NO-DIM NO-DIM NO-DIM O185400200032 1790. 0.0005 O185400200033 1613. 0.0005 O185400200034 945. 0.156 0.003 O185400200035 452. 0.817 0.016 O185400200036 0. 0.0270 0.0007 O185400200037 ENDDATA 7 0 O185400200038 ENDSUBENT 37 0 O185400299999 SUBENT O1854003 20101118 O044O185400300001 BIB 7 21 O185400300002 REACTION ((12-MG-25(P,G),PAR,WID)/(12-MG-25(P,G),,WID)) O185400300003 EN-SEC (E-LVL,13-AL-26) O185400300004 SAMPLE A natural Mg target has been produced by evaporation ofO185400300005 metallic magnesium of natural isotopic composition on O185400300006 a Ta-backing.The Mg target on Ta has been cut into two O185400300007 pieces for the HPGe detector and the BGO crystal O185400300008 measurement, respectively O185400300009 STATUS (TABLE) table 2 of J,PR/C,82,015801,2010 O185400300010 METHOD (GSPEC) O185400300011 DETECTOR (HPGE).A HPGe detector (11.5% relative efficiency, O185400300012 resolution=2.1 keV at E(g)=1.3 MeV) was placed on O185400300013 another movable carriage oriented at 55 degree with O185400300014 respect to the beam axis. O185400300015 ERR-ANALYS (DATA-ERR).At HPGe measurements-The uncertainty takes O185400300016 into account the statistical error and a 3.5% error forO185400300017 the efficiency. O185400300018 At BGO measurements -The uncertainty takes into accountO185400300019 the background correction, decay scheme uncertainties O185400300020 and an error for the simulation. O185400300021 Weighted mean-Common uncertainties- for stopping power O185400300022 and charge integration are added quadratically. O185400300023 ENDBIB 21 0 O185400300024 COMMON 1 3 O185400300025 EN-RES O185400300026 KEV O185400300027 304. O185400300028 ENDCOMMON 3 0 O185400300029 DATA 3 25 O185400300030 E-LVL DATA DATA-ERR O185400300031 KEV NO-DIM NO-DIM O185400300032 5916. 0.0009 0.0002 O185400300033 5726. 0.0010 0.0001 O185400300034 5396. 0.0022 0.0002 O185400300035 4940. 0.0008 0.0001 O185400300036 4622. 0.0028 0.0007 O185400300037 4599. 0.0012 0.0001 O185400300038 4548. 0.0130 0.0007 O185400300039 4349. 0.0003 0.0001 O185400300040 4206. 0.0025 0.0002 O185400300041 4192. 0.191 0.003 O185400300042 3963. 0.0017 0.0001 O185400300043 3750. 0.0092 0.0002 O185400300044 3681. 0.0109 0.0003 O185400300045 3675. 0.0086 0.0013 O185400300046 3596. 0.0429 0.0007 O185400300047 3160. 0.114 0.002 O185400300048 3073. 0.0011 0.0004 O185400300049 2913. 0.0304 0.0005 O185400300050 2661. 0.0100 0.0002 O185400300051 2545. 0.0146 0.0003 O185400300052 2365. 0.0047 0.0002 O185400300053 2069. 0.060 0.001 O185400300054 1759. 0.161 0.003 O185400300055 417. 0.318 0.005 O185400300056 0. 0.00058 0.00004 O185400300057 ENDDATA 27 0 O185400300058 ENDSUBENT 57 0 O185400399999 SUBENT O1854004 20101118 O044O185400400001 BIB 7 21 O185400400002 REACTION ((12-MG-26(P,G),PAR,WID)/(12-MG-26(P,G),,WID)) O185400400003 EN-SEC (E-LVL,13-AL-27) O185400400004 SAMPLE A natural Mg target has been produced by evaporation ofO185400400005 metallic magnesium of natural isotopic composition on O185400400006 a Ta-backing.The Mg target on Ta has been cut into two O185400400007 pieces for the HPGe detector and the BGO crystal O185400400008 measurement, respectively O185400400009 STATUS (TABLE) table 3 of J,PR/C,82,015801,2010 O185400400010 METHOD (GSPEC) O185400400011 DETECTOR (HPGE).A HPGe detector (11.5% relative efficiency, O185400400012 resolution=2.1 keV at E(g)=1.3 MeV) was placed on O185400400013 another movable carriage oriented at 55 degree with O185400400014 respect to the beam axis. O185400400015 ERR-ANALYS (DATA-ERR).At HPGe measurements-The uncertainty takes O185400400016 into account the statistical error and a 3.5% error forO185400400017 the efficiency. O185400400018 At BGO measurements -The uncertainty takes into accountO185400400019 the background correction, decay scheme uncertainties O185400400020 and an error for the simulation. O185400400021 Weighted mean-Common uncertainties- for stopping power O185400400022 and charge integration are added quadratically. O185400400023 ENDBIB 21 0 O185400400024 COMMON 1 3 O185400400025 EN-RES O185400400026 KEV O185400400027 326. O185400400028 ENDCOMMON 3 0 O185400400029 DATA 4 26 O185400400030 E-LVL DATA DATA-ERR DATA-MAX O185400400031 KEV NO-DIM NO-DIM NO-DIM O185400400032 7858. 0.0009 0.0002 O185400400033 7280. 0.0001 O185400400034 7071. 0.0030 0.0002 O185400400035 6993. 0.0017 0.0002 O185400400036 6813. 0.121 0.001 O185400400037 6776. 0.0006 0.0001 O185400400038 6651. 0.0045 0.0002 O185400400039 6605. 0.0126 0.0003 O185400400040 6158. 0.0071 0.0003 O185400400041 6116. 0.0044 0.0002 O185400400042 6081. 0.0059 0.0003 O185400400043 5752. 0.0080 0.0003 O185400400044 5551. 0.0207 0.0005 O185400400045 5438. 0.0022 0.0003 O185400400046 5248. 0.0094 0.0003 O185400400047 5156. 0.0071 0.0003 O185400400048 4812. 0.0054 0.0003 O185400400049 4410. 0.0296 0.0007 O185400400050 4055. 0.109 0.002 O185400400051 3957. 0.0264 0.0007 O185400400052 3680. 0.145 0.002 O185400400053 2982. 0.197 0.003 O185400400054 2735. 0.0443 0.0009 O185400400055 1014. 0.0204 0.0007 O185400400056 844. 0.193 0.003 O185400400057 0. 0.0206 0.0005 O185400400058 ENDDATA 28 0 O185400400059 ENDSUBENT 58 0 O185400499999 SUBENT O1854005 20101118 O044O185400500001 BIB 7 30 O185400500002 REACTION 1(12-MG-24(P,G),,WID/STR) O185400500003 2(12-MG-24(P,G),,WID/STR,,,RECOM) O185400500004 SAMPLE A natural Mg target has been produced by evaporation ofO185400500005 metallic magnesium of natural isotopic composition on O185400500006 a Ta-backing.The Mg target on Ta has been cut into two O185400500007 pieces for the HPGe detector and the BGO crystal O185400500008 measurement, respectively O185400500009 STATUS (TABLE) table 4 of J,PR/C,82,015801,2010 O185400500010 (DEP,O1854002) O185400500011 METHOD (GSPEC) O185400500012 DETECTOR (HPGE).A HPGe detector (11.5% relative efficiency, O185400500013 resolution=2.1 keV at E(g)=1.3 MeV) was placed on O185400500014 another movable carriage oriented at 55 degree with O185400500015 respect to the beam axis. O185400500016 (BGO).The gamma-rays from the reaction to be studied O185400500017 were detected in BGO detection system. O185400500018 The BGO crystal is a cylinder (length = 28 cm) with a O185400500019 coaxial hole (diameter = 6 cm) and a radial thickness O185400500020 of 7 cm. O185400500021 FLAG (1.).HPGe-detector O185400500022 (2.).BGO-detector O185400500023 (3.).Weighted mean O185400500024 ERR-ANALYS (DATA-ERR).At HPGe measurements-The uncertainty takes O185400500025 into account the statistical error and a 3.5% error forO185400500026 the efficiency. O185400500027 At BGO measurements -The uncertainty takes into accountO185400500028 the background correction, decay scheme uncertainties O185400500029 and an error for the simulation. O185400500030 Weighted mean-Common uncertainties- for stopping power O185400500031 and charge integration are added quadratically. O185400500032 ENDBIB 30 0 O185400500033 COMMON 1 3 O185400500034 EN-RES O185400500035 KEV O185400500036 214. O185400500037 ENDCOMMON 3 0 O185400500038 DATA 5 4 O185400500039 DATA 1DATA-ERR 2DATA 2DATA-ERR 2FLAG O185400500040 MILLI-EV MILLI-EV MILLI-EV MILLI-EV NO-DIM O185400500041 10.4 0.4 1. O185400500042 10.6 0.6 3. O185400500043 11.1 0.6 2. O185400500044 11.2 0.9 O185400500045 ENDDATA 6 0 O185400500046 ENDSUBENT 45 0 O185400599999 SUBENT O1854006 20101118 O044O185400600001 BIB 7 30 O185400600002 REACTION 1(12-MG-25(P,G),,WID/STR) O185400600003 2(12-MG-25(P,G),,WID/STR,,,RECOM) O185400600004 SAMPLE A natural Mg target has been produced by evaporation ofO185400600005 metallic magnesium of natural isotopic composition on O185400600006 a Ta-backing.The Mg target on Ta has been cut into two O185400600007 pieces for the HPGe detector and the BGO crystal O185400600008 measurement, respectively O185400600009 STATUS (TABLE) table 4 of J,PR/C,82,015801,2010 O185400600010 (DEP,O1854003) O185400600011 DETECTOR (HPGE).A HPGe detector (11.5% relative efficiency, O185400600012 resolution=2.1 keV at E(g)=1.3 MeV) was placed on O185400600013 another movable carriage oriented at 55 degree with O185400600014 respect to the beam axis. O185400600015 (BGO).The gamma-rays from the reaction to be studied O185400600016 were detected in BGO detection system. O185400600017 The BGO crystal is a cylinder (length = 28 cm) with a O185400600018 coaxial hole (diameter = 6 cm) and a radial thickness O185400600019 of 7 cm. O185400600020 METHOD (GSPEC) O185400600021 FLAG (1.).HPGe-detector O185400600022 (2.).BGO-detector O185400600023 (3.).Weighted mean O185400600024 ERR-ANALYS (DATA-ERR).At HPGe measurements-The uncertainty takes O185400600025 into account the statistical error and a 3.5% error forO185400600026 the efficiency. O185400600027 At BGO measurements -The uncertainty takes into accountO185400600028 the background correction, decay scheme uncertainties O185400600029 and an error for the simulation. O185400600030 Weighted mean-Common uncertainties- for stopping power O185400600031 and charge integration are added quadratically. O185400600032 ENDBIB 30 0 O185400600033 COMMON 1 3 O185400600034 EN-RES O185400600035 KEV O185400600036 304. O185400600037 ENDCOMMON 3 0 O185400600038 DATA 5 4 O185400600039 DATA 1DATA-ERR 2DATA 2DATA-ERR 2FLAG O185400600040 MILLI-EV MILLI-EV MILLI-EV MILLI-EV NO-DIM O185400600041 30.6 1.3 2. O185400600042 30.7 1.1 1. O185400600043 30.7 1.7 3. O185400600044 30.8 1.3 O185400600045 ENDDATA 6 0 O185400600046 ENDSUBENT 45 0 O185400699999 SUBENT O1854007 20101118 O044O185400700001 BIB 7 30 O185400700002 REACTION 1(12-MG-26(P,G),,WID/STR) O185400700003 2(12-MG-26(P,G),,WID/STR,,,RECOM) O185400700004 SAMPLE A natural Mg target has been produced by evaporation ofO185400700005 metallic magnesium of natural isotopic composition on O185400700006 a Ta-backing.The Mg target on Ta has been cut into two O185400700007 pieces for the HPGe detector and the BGO crystal O185400700008 measurement, respectively O185400700009 STATUS (TABLE) table 4 of J,PR/C,82,015801,2010 O185400700010 (DEP,O1854004) O185400700011 METHOD (GSPEC) O185400700012 DETECTOR (HPGE).A HPGe detector (11.5% relative efficiency, O185400700013 resolution=2.1 keV at E(g)=1.3 MeV) was placed on O185400700014 another movable carriage oriented at 55 degree with O185400700015 respect to the beam axis. O185400700016 (BGO).The gamma-rays from the reaction to be studied O185400700017 were detected in BGO detection system. O185400700018 The BGO crystal is a cylinder (length = 28 cm) with a O185400700019 coaxial hole (diameter = 6 cm) and a radial thickness O185400700020 of 7 cm. O185400700021 FLAG (1.).HPGe-detector O185400700022 (2.).BGO-detector O185400700023 (3.).Weighted mean O185400700024 ERR-ANALYS (DATA-ERR).At HPGe measurements-The uncertainty takes O185400700025 into account the statistical error and a 3.5% error forO185400700026 the efficiency. O185400700027 At BGO measurements -The uncertainty takes into accountO185400700028 the background correction, decay scheme uncertainties O185400700029 and an error for the simulation. O185400700030 Weighted mean-Common uncertainties- for stopping power O185400700031 and charge integration are added quadratically. O185400700032 ENDBIB 30 0 O185400700033 COMMON 1 3 O185400700034 EN-RES O185400700035 KEV O185400700036 326. O185400700037 ENDCOMMON 3 0 O185400700038 DATA 5 4 O185400700039 DATA 1DATA-ERR 2DATA 2DATA-ERR 2FLAG O185400700040 MILLI-EV MILLI-EV MILLI-EV MILLI-EV NO-DIM O185400700041 272. 12. 2. O185400700042 274. 15. 3. O185400700043 276. 11. 1. O185400700044 271. 10. O185400700045 ENDDATA 6 0 O185400700046 ENDSUBENT 45 0 O185400799999 SUBENT O1854008 20101118 O044O185400800001 BIB 6 37 O185400800002 REACTION ((12-MG-25(P,G),,WID/STR)// O185400800003 (12-MG-25(P,G),,WID/STR)) O185400800004 STATUS (TABLE) table 7 of J,PR/C,82,015801,2010 O185400800005 COMMENT *By authors*.Numerator-AMS measurement-pointer 2, O185400800006 Denominator-BGO measurement-pointer 1, O185400800007 *By authors*.A high-quality AMS measurement is possibleO185400800008 and no systematic difference exists between AMS result O185400800009 and gamma-ray data. O185400800010 METHOD 1(GSPEC) O185400800011 2(AMS) O185400800012 SAMPLE 1A natural Mg target has been produced by evaporation ofO185400800013 metallic magnesium of natural isotopic composition on O185400800014 a Ta-backing.The Mg target on Ta has been cut into two O185400800015 pieces for the HPGe detector and the BGO crystal O185400800016 measurement, respectively O185400800017 2The Mg-25 targets for these AMS measurements were O185400800018 prepared by reducing enriched MgO mixed with zirconium O185400800019 powder and evaporation with an electron gun. The targetO185400800020 thickness was between 40 and 60 mug/cm**2 correspondingO185400800021 to an energy loss of 20 and 30 keV at the resonance O185400800022 energy. O185400800023 ERR-ANALYS (DATA-ERR).The AMS measurement has an uncertainty of 2%O185400800024 arising from the normalization to the reference samplesO185400800025 Additional systematic errors take into account the O185400800026 uncertainties of the carrier weight-0.2% and the O185400800027 efficiency of the chemical treatment of the samples-1%.O185400800028 This leads to an overall systematic uncertainty of 2.5%O185400800029 for the AMS measurement. O185400800030 The uncertainties of the corresponding gamma-ray O185400800031 measurement are given by the absolute efficiency O185400800032 determination for the BGO detector-3%, O185400800033 the decay scheme-3%, the ground-state probability O185400800034 f(0)-1%: a total systematic error of 4%. The O185400800035 uncertainty of the effective stopping power and the O185400800036 charge integration represent common uncertainties to O185400800037 both methods and therefore, were not taken into accountO185400800038 in the error estimate for the wg ratio. O185400800039 ENDBIB 37 0 O185400800040 COMMON 1 3 O185400800041 EN-RES O185400800042 KEV O185400800043 304. O185400800044 ENDCOMMON 3 0 O185400800045 DATA 2 1 O185400800046 DATA DATA-ERR O185400800047 NO-DIM NO-DIM O185400800048 1.02 0.05 O185400800049 ENDDATA 3 0 O185400800050 ENDSUBENT 49 0 O185400899999 ENDENTRY 8 0 O185499999999