ENTRY A0636 20180615 A090A063600000001 SUBENT A0636001 20180615 A090A063600100001 BIB 14 53 A063600100002 TITLE The effects of electron screening and resonances in A063600100003 (p,alpha) reactions on 10-B and 11-B at thermal A063600100004 energies. A063600100005 AUTHOR (C.Angulo, S.Engstler, G.Raimann, C.Rolfs, A063600100006 W.H.Schulte, E.Somorjai) A063600100007 INSTITUTE (2GERBOC) A063600100008 (3HUNDEB) A063600100009 REFERENCE (J,ZP/A,345,231,1993) A063600100010 PART-DET (A) A063600100011 DETECTOR (SIBAR) 4 surface barrier Si-detectors were positioned A063600100012 at 130 degrees [lab-system] around the beam axis at a A063600100013 mean distance of 40 mm, approximately. A063600100014 The detectors were covered by nickel foils to stop A063600100015 the intense flux of scattered particles. A063600100016 Characteristics of detectors: active area - 6 cm-sq, A063600100017 effective thickness - 300 mu-m, energy resolution - A063600100018 22 keV at 5.5 MeV alpha-particles. A063600100019 FACILITY (CCW,2GERBOC) 100 and 400 kV accelerators. A063600100020 INC-SPECT Uncertainty in energy depends on accelerator: A063600100021 100 kV 400kV A063600100022 absolute energy: +- 26eV +- 1.keV A063600100023 energy spread: 20eV 1.keV A063600100024 This uncertainty was taken into account in ERR-1 A063600100025 METHOD (EXTB) The 100 and 400 kV accelerators provided H1+,H2+A063600100026 and H3+ ion beams in the proton energy range 17-150 keVA063600100027 (SITA) A063600100028 (BCINT) Secondary electrons were suppressed. A063600100029 ERR-ANALYS (ERR-1) Errors arise from uncertainties in number of A063600100030 counts, effective energy, and target deterioration. A063600100031 (ERR-2) Uncertainties due to solid angle A063600100032 (ERR-3) Uncertainties due to effective stopping power A063600100033 (ERR-4) Uncertainty of beam current. A063600100034 ADD-RES Electron screening potential for H+B system was A063600100035 determined as 430+/-80 eV. A063600100036 The paper contains very much experimental details, A063600100037 which could not be included in the compilation. A063600100038 COMMENT - By authors. Effective energy (En-cm) in data A063600100039 sections corresponds to that energy within the target,A063600100040 at which one-half of the reaction yield is obtained. A063600100041 - By authors - in the measurements at low energies, theA063600100042 target chamber was surrounded by a 5 cm thick lead A063600100043 shield and a plastic scintillator of 1.2 m2 area and A063600100044 5 cm thickness was placed above the taget chamber. A063600100045 Both components were used to identify and reduce the A063600100046 contributions of cosmic rays and room background. A063600100047 STATUS (TABLE) Table 2 of Z.Phys.A345(1993)231 A063600100048 HISTORY (19990608C) By F.Ch A063600100049 (19990621A) Date is corrected A063600100050 (20041008A) Updated for new rules. A063600100051 (20041216U) Last checking has been done. A063600100052 (20180615U) SD: Small corrections an all Subents.STATUSA063600100053 added. REL-REF deleted (the same given in Subent 002). A063600100054 EN-ERR1/2, ERR-4/5 deleted (see ERR-ANALYS). A063600100055 ENDBIB 53 0 A063600100056 COMMON 3 3 A063600100057 ERR-2 ERR-3 ERR-4 A063600100058 PER-CENT PER-CENT PER-CENT A063600100059 1. 5. 3. A063600100060 ENDCOMMON 3 0 A063600100061 ENDSUBENT 60 0 A063600199999 SUBENT A0636002 20180615 A090A063600200001 BIB 6 13 A063600200002 REACTION (5-B-10(P,A)4-BE-7,PAR,SIG,,SFC) A063600200003 SAMPLE Boron targets were enriched to 93% in B-10. Three A063600200004 targets with thicknesses 100, 107, and 86 mu-g/cm2 A063600200005 were used. A063600200006 REL-REF (O,A0638002,C.Angulo+,J,ZP/A,345,333,1993) Cross A063600200007 section for first excited state (429 keV) of Be-7 A063600200008 production. A063600200009 CORRECTION The resulting count rates were corrected for dead time A063600200010 effects (< 2%) as well as for the observed yield A063600200011 decrease as a function of accumulated charge of target.A063600200012 COMMENT - By compiler - the authors measured cross section for A063600200013 ground state of Be-7 production only. A063600200014 HISTORY (20180615U) SD: Small correction in REL-REF. A063600200015 ENDBIB 13 0 A063600200016 COMMON 1 3 A063600200017 E-LVL A063600200018 KEV A063600200019 0. A063600200020 ENDCOMMON 3 0 A063600200021 DATA 3 38 A063600200022 EN-CM DATA ERR-1 A063600200023 KEV B*MEV B*MEV A063600200024 18.73 1860. 380. A063600200025 19.64 1740. 380. A063600200026 21.1 1200. 170. A063600200027 22.37 960. 210. A063600200028 23.28 910. 200. A063600200029 24.73 509. 72. A063600200030 26.52 554. 40. A063600200031 28.6 589. 35. A063600200032 30.85 399. 25. A063600200033 33.13 422. 25. A063600200034 35.39 265. 18. A063600200035 37.64 338. 22. A063600200036 39.91 291. 18. A063600200037 43.6 220. 13. A063600200038 48.06 200. 12. A063600200039 51.26 138. 8. A063600200040 53.53 112. 7. A063600200041 55.79 161. 10. A063600200042 58.07 135. 8. A063600200043 60.34 149. 9. A063600200044 62.61 130. 8. A063600200045 64.88 102. 6. A063600200046 67.15 107. 6. A063600200047 69.42 101. 6. A063600200048 71.69 120. 7. A063600200049 75.25 70. 4. A063600200050 79.79 82. 4. A063600200051 84.32 69. 4. A063600200052 88.86 70. 4. A063600200053 93.4 70. 4. A063600200054 97.94 56. 3. A063600200055 102.5 64. 4. A063600200056 107. 44. 3. A063600200057 111.6 48. 3. A063600200058 116.1 46. 3. A063600200059 120.6 38. 2. A063600200060 125.2 34. 2. A063600200061 132.3 20. 2. A063600200062 ENDDATA 40 0 A063600200063 ENDSUBENT 62 0 A063600299999 SUBENT A0636003 20180615 A090A063600300001 BIB 3 4 A063600300002 REACTION (5-B-11(P,A)4-BE-8,,SIG,,SFC) A063600300003 SAMPLE Boron target was natural isotopic composition. Two A063600300004 targets with thicknesses 80 and 60 mug/cm2 were used. A063600300005 HISTORY (20180615U) SD: Cosmetic correction. A063600300006 ENDBIB 4 0 A063600300007 NOCOMMON 0 0 A063600300008 DATA 3 30 A063600300009 EN-CM DATA ERR-1 A063600300010 KEV B*MEV B*MEV A063600300011 16.72 300. 67. A063600300012 18.54 288. 42. A063600300013 19.8 267. 54. A063600300014 20.73 264. 48. A063600300015 22.19 249. 27. A063600300016 24.04 251. 25. A063600300017 26.4 236. 18. A063600300018 30.27 225. 13. A063600300019 34.79 217. 13. A063600300020 39.34 223. 13. A063600300021 43.9 211. 13. A063600300022 48.46 210. 13. A063600300023 53.02 206. 12. A063600300024 57.59 206. 12. A063600300025 62.16 216. 13. A063600300026 66.73 202. 12. A063600300027 71.3 208. 12. A063600300028 75.87 205. 12. A063600300029 80.45 207. 12. A063600300030 85.02 215. 13. A063600300031 91.18 209. 12. A063600300032 96.91 219. 13. A063600300033 101.5 215. 13. A063600300034 106.1 228. 14. A063600300035 110.7 233. 14. A063600300036 115.2 243. 14. A063600300037 119.8 254. 15. A063600300038 124.4 258. 15. A063600300039 129. 275. 16. A063600300040 133.5 299. 18. A063600300041 ENDDATA 32 0 A063600300042 ENDSUBENT 41 0 A063600399999 ENDENTRY 3 0 A063699999999