ENTRY C3047 20250228 C304700000001 SUBENT C3047001 20250228 20250711 C304700100001 BIB 8 23 C304700100002 TITLE First total cross section measurements of C304700100003 25,26Mg(alpha,n)28,29Si via direct recoil detection C304700100004 AUTHOR (D.Blankstein,D.W.Bardayan,P.D.O'Malley,J.Allen, C304700100005 T.L.Bailey,C.Boomershine,E.Briley,D.P.Burdette, C304700100006 L.K.Callahan,S.Carmichael,A.M.Clark,A.C.Dombos, C304700100007 O.Olivas-Gomez,S.L.Henderson,L.Morales,A.D.Nelson, C304700100008 J.Wilkinson) C304700100009 REFERENCE (J,PR/C,110,045803,2024) C304700100010 #doi:10.1103/PhysRevC.110.045803 C304700100011 (T,BLANKSTEIN,2023) C304700100012 DETECTOR (IOCH) The Active Target High Efficiency detector for C304700100013 Nuclear Astrophysics (ATHENA) is an ionization C304700100014 chamber, the basic design of which consists of a gas C304700100015 in a uniform electric field. C304700100016 ERR-ANALYS (ERR-S) The uncertainties in ATHENA cross section C304700100017 data are statistical. The error bars in the energy C304700100018 measurement represent the inherent ambiguity in where C304700100019 reactions occur within the reaction strip. Therefore, C304700100020 the error bar represents the center-of-mass energy C304700100021 loss which covers the entire strip. C304700100022 INSTITUTE (1USANOT) C304700100023 FACILITY (VDGT,1USANOT) C304700100024 HISTORY (20250228C) BP C304700100025 ENDBIB 23 0 C304700100026 NOCOMMON 0 0 C304700100027 ENDSUBENT 26 0 C304700199999 SUBENT C3047002 20250228 20250711 C304700200001 BIB 5 18 C304700200002 REACTION (6-C-12(6-C-12,X)12-MG-24,,SIG) C304700200003 REL-REF (A,,D.G.Kovar+,J,PR/C,20,1305,1979) C304700200004 SAMPLE CH4 gas was used as the target in ATHENA. The beam C304700200005 lost approximately 3 MeV through a 6.25 microm mylar C304700200006 window and 20 MeV through 150 Torr of CH4 gas. This C304700200007 gave energy loss steps of approximately 1.5 MeV in C304700200008 the c.m. energy frame for each individual strip. C304700200009 ANALYSIS Fusion evaporation residues analysis. The first step C304700200010 in this process is to scale the energy of all of the C304700200011 strips to the first strip. This makes the gating C304700200012 process in the subsequent steps in the analysis C304700200013 easier as all beam-like events will occur at the same C304700200014 energies. After scaling, events were gated on C304700200015 beam-like events in the first strip to eliminate C304700200016 reaction events occurring in the window or the dead C304700200017 space before the first strip. This condition will C304700200018 also remove any pile-up events. C304700200019 STATUS (CURVE,,D.Blankstein,T,BLANKSTEIN,2023) - Fig. 3.13 C304700200020 ENDBIB 18 0 C304700200021 NOCOMMON 0 0 C304700200022 DATA 4 11 C304700200023 EN-CM EN-RSL DATA ERR-S C304700200024 MEV MEV MB MB C304700200025 11.413 0.311 614.103 29.487 C304700200026 12.034 0.311 655.128 30.769 C304700200027 12.655 0.295 717.949 30.769 C304700200028 13.245 0.280 789.744 32.051 C304700200029 13.820 0.280 805.128 34.615 C304700200030 14.379 0.280 891.026 38.462 C304700200031 14.938 0.264 870.513 34.615 C304700200032 15.481 0.280 797.436 32.051 C304700200033 16.009 0.264 880.769 34.615 C304700200034 16.522 0.248 846.154 34.615 C304700200035 17.034 0.264 778.205 33.333 C304700200036 ENDDATA 13 0 C304700200037 ENDSUBENT 36 0 C304700299999 SUBENT C3047003 20250228 20250711 C304700300001 BIB 5 6 C304700300002 REACTION (2-HE-4(12-MG-25,N)14-SI-28,,SIG) C304700300003 REL-REF (A,,M.Anderson+,J,NP/A,405,170,1983) C304700300004 (A,,L.Van Der Zwan+,J,NSE,79,197,1981) C304700300005 SAMPLE He gas as the target/ionization medium, 225 Torr. C304700300006 METHOD (REC) Direct recoil detection. C304700300007 STATUS (CURVE,,D.Blankstein,T,BLANKSTEIN,2023) - Fig. 4.14 C304700300008 ENDBIB 6 0 C304700300009 NOCOMMON 0 0 C304700300010 DATA 4 6 C304700300011 EN-CM EN-RSL DATA ERR-S C304700300012 MEV MEV MB MB C304700300013 3.569 0.082 9.067E+01 4.906E+00 C304700300014 3.769 0.089 1.033E+02 5.954E+00 C304700300015 3.958 0.088 1.247E+02 5.366E+00 C304700300016 4.142 0.092 1.526E+02 C304700300017 4.328 0.095 1.700E+02 C304700300018 4.515 0.096 2.332E+02 C304700300019 ENDDATA 8 0 C304700300020 ENDSUBENT 19 0 C304700399999 SUBENT C3047004 20250228 20250711 C304700400001 BIB 5 6 C304700400002 REACTION (2-HE-4(12-MG-25,N)14-SI-28,,SIG) C304700400003 REL-REF (A,,M.Anderson+,J,NP/A,405,170,1983) C304700400004 (A,,L.Van Der Zwan+,J,NSE,79,197,1981) C304700400005 SAMPLE He gas as the target/ionization medium, 275 Torr. C304700400006 METHOD (REC) Direct recoil detection. C304700400007 STATUS (CURVE,,D.Blankstein,T,BLANKSTEIN,2023) - Fig. 4.14 C304700400008 ENDBIB 6 0 C304700400009 NOCOMMON 0 0 C304700400010 DATA 4 4 C304700400011 EN-CM EN-RSL DATA ERR-S C304700400012 MEV MEV MB MB C304700400013 .228 0.103 5.335E+01 3.074E+00 C304700400014 3.467 0.117 8.151E+01 5.345E+00 C304700400015 3.698 0.114 1.106E+02 C304700400016 3.946 0.100 1.256E+02 C304700400017 ENDDATA 6 0 C304700400018 ENDSUBENT 17 0 C304700499999 SUBENT C3047005 20250228 20250711 C304700500001 BIB 5 5 C304700500002 REACTION (2-HE-4(12-MG-26,N)14-SI-29,,SIG) C304700500003 REL-REF (A,,M.Anderson+,J,NP/A,405,170,1983) C304700500004 SAMPLE He gas as the target/ionization medium, 300 Torr. C304700500005 METHOD (REC) Direct recoil detection. C304700500006 STATUS (CURVE,,D.Blankstein,T,BLANKSTEIN,2023) - Fig. 4.15 C304700500007 ENDBIB 5 0 C304700500008 NOCOMMON 0 0 C304700500009 DATA 5 5 C304700500010 EN-CM +EN-RSL -EN-RSL DATA ERR-S C304700500011 MEV MEV MEV MB MB C304700500012 3.173 0.082 0.176 2.078E+01 2.253E+00 C304700500013 3.383 0.120 0.116 2.977E+01 C304700500014 3.680 0.090 0.172 9.673E+01 C304700500015 3.913 0.107 0.133 1.083E+02 C304700500016 4.145 0.120 0.133 1.361E+02 C304700500017 ENDDATA 7 0 C304700500018 ENDSUBENT 17 0 C304700599999 SUBENT C3047006 20250228 20250711 C304700600001 BIB 5 5 C304700600002 REACTION (2-HE-4(12-MG-26,N)14-SI-29,,SIG) C304700600003 REL-REF (A,,M.Anderson+,J,NP/A,405,170,1983) C304700600004 SAMPLE He gas as the target/ionization medium, 350 Torr. C304700600005 METHOD (REC) Direct recoil detection. C304700600006 STATUS (CURVE,,D.Blankstein,T,BLANKSTEIN,2023) - Fig. 4.15 C304700600007 ENDBIB 5 0 C304700600008 NOCOMMON 0 0 C304700600009 DATA 5 7 C304700600010 EN-CM +EN-RSL -EN-RSL DATA ERR-S C304700600011 MEV MEV MEV MB MB C304700600012 3.216 0.009 0.163 2.408E+01 2.256E+00 C304700600013 3.508 0.129 0.150 3.505E+01 2.225E+00 C304700600014 3.844 0.099 0.181 1.157E+02 1.084E+01 C304700600015 4.072 0.133 0.120 1.234E+02 5.924E+00 C304700600016 4.368 0.138 0.129 1.602E+02 1.736E+01 C304700600017 4.674 0.116 0.146 2.572E+02 2.787E+01 C304700600018 4.932 0.138 0.129 2.654E+02 3.260E+01 C304700600019 ENDDATA 9 0 C304700600020 ENDSUBENT 19 0 C304700699999 SUBENT C3047007 20250228 20250711 C304700700001 BIB 3 5 C304700700002 REACTION (12-MG-25(A,N)14-SI-28,,SIG,,SFC) C304700700003 ANALYSIS Converted S-Factors from the 225 Torr cross-section C304700700004 data. C304700700005 STATUS (DEP,C3047003) C304700700006 (CURVE,,D.Blankstein,T,BLANKSTEIN,2023) - Fig. 5.1 C304700700007 ENDBIB 5 0 C304700700008 NOCOMMON 0 0 C304700700009 DATA 4 6 C304700700010 EN-CM EN-RSL DATA ERR-S C304700700011 MEV MEV B*MEV B*MEV C304700700012 3.571 0.098 1.611E+09 1.175E+08 C304700700013 3.771 0.098 1.102E+09 9.574E+07 C304700700014 3.961 0.103 8.907E+08 C304700700015 4.146 0.082 7.767E+08 C304700700016 4.331 0.087 5.999E+08 C304700700017 4.521 0.087 6.565E+08 C304700700018 ENDDATA 8 0 C304700700019 ENDSUBENT 18 0 C304700799999 SUBENT C3047008 20250228 20250711 C304700800001 BIB 3 5 C304700800002 REACTION (12-MG-25(A,N)14-SI-28,,SIG,,SFC) C304700800003 ANALYSIS Converted S-Factors from the 275 Torr cross-section C304700800004 data. C304700800005 STATUS (DEP,C3047004) C304700800006 (CURVE,,D.Blankstein,T,BLANKSTEIN,2023) - Fig. 5.1 C304700800007 ENDBIB 5 0 C304700800008 NOCOMMON 0 0 C304700800009 DATA 4 4 C304700800010 EN-CM EN-RSL DATA ERR-S C304700800011 MEV MEV B*MEV B*MEV C304700800012 3.227 0.113 2.055E+09 1.786E+08 C304700800013 3.463 0.118 1.819E+09 C304700800014 3.700 0.139 1.470E+09 C304700800015 3.956 0.108 9.755E+08 C304700800016 ENDDATA 6 0 C304700800017 ENDSUBENT 16 0 C304700899999 SUBENT C3047009 20250228 20250711 C304700900001 BIB 4 8 C304700900002 REACTION (12-MG-26(A,N)14-SI-29,,SIG,,SFC) C304700900003 ANALYSIS Converted S-Factors from the 300 Torr cross-section C304700900004 data. C304700900005 ERR-ANALYS S-factor uncertainties are comparable or less of C304700900006 plotted symbols, and cannot be recovered with C304700900007 digitizers. C304700900008 STATUS (DEP,C3047005) C304700900009 (CURVE,,D.Blankstein,T,BLANKSTEIN,2023) - Fig. 5.2 C304700900010 ENDBIB 8 0 C304700900011 NOCOMMON 0 0 C304700900012 DATA 4 5 C304700900013 EN-CM +EN-RSL -EN-RSL DATA C304700900014 MEV MEV MEV B*MEV C304700900015 3.179 0.075 0.159 3.711E+09 C304700900016 3.388 0.134 0.105 2.624E+09 C304700900017 3.682 0.095 0.154 3.419E+09 C304700900018 3.915 0.100 0.134 2.065E+09 C304700900019 4.149 0.124 0.124 1.437E+09 C304700900020 ENDDATA 7 0 C304700900021 ENDSUBENT 20 0 C304700999999 SUBENT C3047010 20250228 20250711 C304701000001 BIB 3 5 C304701000002 REACTION (12-MG-26(A,N)14-SI-29,,SIG,,SFC) C304701000003 ANALYSIS Converted S-Factors from the 350 Torr cross-section C304701000004 data. C304701000005 STATUS (DEP,C3047006) C304701000006 (CURVE,,D.Blankstein,T,BLANKSTEIN,2023) - Fig. 5.2 C304701000007 ENDBIB 5 0 C304701000008 NOCOMMON 0 0 C304701000009 DATA 5 7 C304701000010 EN-CM +EN-RSL -EN-RSL DATA ERR-S C304701000011 MEV MEV MEV B*MEV B*MEV C304701000012 3.224 0.124 0.159 3.540E+09 3.185E+08 C304701000013 3.512 0.144 0.149 2.007E+09 2.090E+08 C304701000014 3.851 0.085 0.169 2.534E+09 3.341E+08 C304701000015 4.074 0.159 0.129 1.555E+09 1.620E+08 C304701000016 4.373 0.149 0.134 1.016E+09 1.199E+08 C304701000017 4.676 0.119 0.154 8.799E+08 1.160E+08 C304701000018 4.925 0.154 0.124 5.571E+08 4.208E+07 C304701000019 ENDDATA 9 0 C304701000020 ENDSUBENT 19 0 C304701099999 ENDENTRY 10 0 C304799999999