ENTRY O0671 20220108 O086O067100000001 SUBENT O0671001 20220108 O086O067100100001 BIB 10 46 O067100100002 TITLE Total (p,pi+) cross sections on light nuclei near the O067100100003 pion Coulomb barrier. O067100100004 AUTHOR (R.E.Marrs,R.E.Pollock,W.W.Jacobs) O067100100005 INSTITUTE (1USAINU) O067100100006 REFERENCE (J,PR/C,20,2308,1979) O067100100007 REL-REF (O,O0526001,R.E.Marrs+,J,PR/C,20,2446,1979) Inclusive O067100100008 positive pions production for heavy nuclides too. O067100100009 DETECTOR (CEREN) Three 1.27-cm thick plastic Cerenkov counters, O067100100010 Consisted of 15.2*15.2-cm Pilot 425 Cerenkov material, O067100100011 which contains a wavelength shifter. O067100100012 (SCIN) One 0.64-cm Thick Scintillation Counter. O067100100013 A veto scintillation counter rejected cosmic rays with O067100100014 90% efficiency. The time profile of the beam was O067100100015 monitored with a 10-cm deep plastic-scintillator O067100100016 charged-particle counter situated at approximately 40 O067100100017 degree and 1.5-m from target. O067100100018 FACILITY (CYCLO,1USAINU) O067100100019 METHOD (BCINT) The average proton current was collected in O067100100020 Faraday cup and integrated. Time-averaged beam currentsO067100100021 varied between 5 and 20 nA. O067100100022 ERR-ANALYS (ERR-1) The error bar includes both statistical errors O067100100023 and uncertainties in target thickness and uniformity. O067100100024 (ERR-2) Uncertainty in the normalization of the O067100100025 experiment as given in Table I: O067100100026 Contributions to the positron detection efficiency and O067100100027 its uncertainty O067100100028 1. Positron spectrum cutoff-0.92+-3%, O067100100029 2. Annihilation in Flight-0.93+-3%, O067100100030 3. Cerenkov counter Efficiencies-0.97+3%(-5%), O067100100031 4. Extended size of positron source- 1.00+-2%, O067100100032 5. Solid angle uncertainty-1.00+-4%, O067100100033 6. Veto counter false rejection-0.99+1%-3%, O067100100034 7. Positron multiple scattering in counters-0.97+-2%, O067100100035 8. Holes at 0-degree and 180-degree- negligible O067100100036 effect, O067100100037 9. Shadowing by target assembly- negligible effect, O067100100038 10. Positive muon-positron directional correlation- O067100100039 negligible effect, O067100100040 11. Positive pion Interaction before decay- negligible O067100100041 effect, O067100100042 12. Total efficiency-0.80+-9%. O067100100043 HISTORY (19991110C) O067100100044 (19991111U) Last checking has been done. O067100100045 (19991117A) DATE is corrected O067100100046 (20220108A) SD:Corrections in all Subents. O067100100047 ERR-T -> ERR-1; EN-ERR2 -> EN-ERR. O067100100048 ENDBIB 46 0 O067100100049 COMMON 2 3 O067100100050 EN-ERR ERR-2 O067100100051 MEV PER-CENT O067100100052 0.2 9. O067100100053 ENDCOMMON 3 0 O067100100054 ENDSUBENT 53 0 O067100199999 SUBENT O0671002 20220108 O086O067100200001 BIB 4 6 O067100200002 REACTION (4-BE-9(P,X)1-PP-0,,SIG) O067100200003 SAMPLE Metallic berillium, total thickness-91 mg/cm**2, O067100200004 mass fraction of target-100%. O067100200005 STATUS (CURVE) Fig.4 from Phys.Rev.,C20(1979)2308 O067100200006 HISTORY (20220108A) SD: SF3=PIP -> X; SF4=Be-10 -> PP-0 in O067100200007 REACTION code. EN-ERR1 -> EN-ERR-DIG; ERR-T -> ERR-1. O067100200008 ENDBIB 6 0 O067100200009 COMMON 1 3 O067100200010 EN-ERR-DIG O067100200011 MEV O067100200012 4.E-02 O067100200013 ENDCOMMON 3 0 O067100200014 DATA 3 3 O067100200015 EN DATA ERR-1 O067100200016 MEV MICRO-B PER-CENT O067100200017 151.3 5.2E-02 10. O067100200018 152.4 7.8E-02 9. O067100200019 154.3 0.214 8. O067100200020 ENDDATA 5 0 O067100200021 ENDSUBENT 20 0 O067100299999 SUBENT O0671003 20220108 O086O067100300001 BIB 4 6 O067100300002 REACTION (5-B-10(P,X)1-PP-0,,SIG) O067100300003 SAMPLE Scintered B-10, total thickness-61 mg/cm**2, O067100300004 mass fraction of target-96.2%. O067100300005 STATUS (CURVE) Fig.5 from Phys.Rev.,C20(1979)2308 O067100300006 HISTORY (20220108A) SD: SF3=PIP -> X; SF4=B-11 -> PP-0 in O067100300007 REACTION code. EN-ERR1 -> EN-ERR-DIG; ERR-T -> ERR-1. O067100300008 ENDBIB 6 0 O067100300009 COMMON 1 3 O067100300010 EN-ERR-DIG O067100300011 MEV O067100300012 4.E-02 O067100300013 ENDCOMMON 3 0 O067100300014 DATA 3 6 O067100300015 EN DATA ERR-1 O067100300016 MEV MICRO-B PER-CENT O067100300017 143.7 5.1E-02 25. O067100300018 143.9 0.102 14. O067100300019 146.6 0.65 11. O067100300020 148.3 0.94 11. O067100300021 150. 1.35 15. O067100300022 152.3 1.91 9. O067100300023 ENDDATA 8 0 O067100300024 ENDSUBENT 23 0 O067100399999 SUBENT O0671004 20220108 O086O067100400001 BIB 5 8 O067100400002 REACTION (5-B-11(P,X)1-PP-0,,SIG) O067100400003 COMMENT /by authors/ The B-11 cross sections were corrected forO067100400004 the contribution from the B-10 impurity in the target. O067100400005 SAMPLE Scintered B-11, total thickness-110 mg/cm**2, O067100400006 Mass fraction of target-97.2%. O067100400007 STATUS (CURVE) Fig.6 from Phys.Rev.,C20(1979)2308 O067100400008 HISTORY (20220108A) SD: SF3=PIP -> X; SF4=B-12 -> PP-0 in O067100400009 REACTION code. EN-ERR1 -> EN-ERR-DIG; ERR-T -> ERR-1. O067100400010 ENDBIB 8 0 O067100400011 COMMON 1 3 O067100400012 EN-ERR-DIG O067100400013 MEV O067100400014 5.E-02 O067100400015 ENDCOMMON 3 0 O067100400016 DATA 3 3 O067100400017 EN DATA ERR-1 O067100400018 MEV MICRO-B PER-CENT O067100400019 151.3 1.E-02 80. O067100400020 152.3 6.9E-02 25. O067100400021 154.2 0.35 11. O067100400022 ENDDATA 5 0 O067100400023 ENDSUBENT 22 0 O067100499999 SUBENT O0671005 20220108 O086O067100500001 BIB 4 8 O067100500002 REACTION (6-C-12(P,X)1-PP-0,,SIG) O067100500003 SAMPLE 1.Natural graphite, total thickness-127 mg/cm**2, O067100500004 mass fraction of target-98.9%. O067100500005 2. Enriched graphite, total thickness -54.8 mg/cm**2, O067100500006 mass fraction of target - 100%. O067100500007 STATUS (CURVE) Fig.4 from Phys.Rev.,C20(1979)2308 O067100500008 HISTORY (20220108A) SD: SF3=PIP -> X; SF4=C-13 -> PP-0 in O067100500009 REACTION code. EN-ERR1 -> EN-ERR-DIG; ERR-T -> ERR-1. O067100500010 ENDBIB 8 0 O067100500011 COMMON 1 3 O067100500012 EN-ERR-DIG O067100500013 MEV O067100500014 5.E-02 O067100500015 ENDCOMMON 3 0 O067100500016 DATA 3 4 O067100500017 EN DATA ERR-1 O067100500018 MEV MICRO-B PER-CENT O067100500019 150.1 5.1E-02 50. O067100500020 151.2 8.9E-02 18. O067100500021 152.2 0.177 14. O067100500022 154.2 0.68 6. O067100500023 ENDDATA 6 0 O067100500024 ENDSUBENT 23 0 O067100599999 SUBENT O0671006 20220108 O086O067100600001 BIB 4 6 O067100600002 REACTION (6-C-13(P,X)1-PP-0,,SIG) O067100600003 SAMPLE Enriched graphite, total thickness-65 mg/cm**2, O067100600004 mass fraction of target-97%. O067100600005 STATUS (CURVE) Fig.4 from Phys.Rev.,C20(1979)2308 O067100600006 HISTORY (20220108A) SD: SF3=PIP -> X; SF4=C-14 -> PP-0 in O067100600007 REACTION code. EN-ERR1 -> EN-ERR-DIG; ERR-T -> ERR-1. O067100600008 ENDBIB 6 0 O067100600009 COMMON 1 3 O067100600010 EN-ERR-DIG O067100600011 MEV O067100600012 5.E-02 O067100600013 ENDCOMMON 3 0 O067100600014 DATA 3 4 O067100600015 EN DATA ERR-1 O067100600016 MEV MICRO-B PER-CENT O067100600017 147. 1.E-02 180. O067100600018 148.6 3.8E-02 30. O067100600019 151.3 0.137 18. O067100600020 152.4 0.4 13. O067100600021 ENDDATA 6 0 O067100600022 ENDSUBENT 21 0 O067100699999 SUBENT O0671007 20220108 O086O067100700001 BIB 5 8 O067100700002 REACTION (7-N-14(P,X)1-PP-0,,SIG) O067100700003 CORRECTION N-14 cross sections were corrected for the C-12 O067100700004 component in the melamine target. O067100700005 SAMPLE C(3)H(6)N(6)-(melamine), total thickness-95 mg/cm**2, O067100700006 mass fraction of target-66.4%. O067100700007 STATUS (CURVE) Fig.4 from Phys.Rev.,C20(1979)2308 O067100700008 HISTORY (20220108A) SD: SF3=PIP -> X; SF4=N-15 -> PP-0 in O067100700009 REACTION code. EN-ERR1 -> EN-ERR-DIG; ERR-T -> ERR-1. O067100700010 ENDBIB 8 0 O067100700011 COMMON 1 3 O067100700012 EN-ERR-DIG O067100700013 MEV O067100700014 5.E-02 O067100700015 ENDCOMMON 3 0 O067100700016 DATA 3 5 O067100700017 EN DATA ERR-1 O067100700018 MEV MICRO-B PER-CENT O067100700019 143.8 7.8E-02 27. O067100700020 144.5 9.3E-02 22. O067100700021 147. 0.245 11. O067100700022 148.5 0.58 10. O067100700023 152.4 1.94 7. O067100700024 ENDDATA 7 0 O067100700025 ENDSUBENT 24 0 O067100799999 SUBENT O0671008 20220108 O086O067100800001 BIB 5 9 O067100800002 REACTION (8-O-16(P,X)1-PP-0,,SIG) O067100800003 SAMPLE Li-O-H, total thickness-51.3 mg/cm**2, O067100800004 mass fraction of target-66.7%. O067100800005 COMMENT -By Authors - The chemical composition of the O067100800006 Li-O-H-target was verified by heating it in a vacuum O067100800007 and reweighting. O067100800008 STATUS (CURVE) Fig.4 from Phys.Rev.,C20(1979)2308 O067100800009 HISTORY (20220108A) SD: SF3=PIP -> X; SF4=O-17 -> PP-0 in O067100800010 REACTION code. EN-ERR1 -> EN-ERR-DIG; ERR-T -> ERR-1. O067100800011 ENDBIB 9 0 O067100800012 COMMON 1 3 O067100800013 EN-ERR-DIG O067100800014 MEV O067100800015 4.E-02 O067100800016 ENDCOMMON 3 0 O067100800017 DATA 3 5 O067100800018 EN DATA ERR-1 O067100800019 MEV MICRO-B PER-CENT O067100800020 147. 7.6E-02 22. O067100800021 148.7 0.28 11. O067100800022 150.1 0.74 14. O067100800023 152.5 1.28 9. O067100800024 154.4 2.03 6. O067100800025 ENDDATA 7 0 O067100800026 ENDSUBENT 25 0 O067100899999 ENDENTRY 8 0 O067199999999