ENTRY 14543 20190612 14551454300000001 SUBENT 14543001 20190612 14551454300100001 BIB 9 33 1454300100002 TITLE Origin of protons in californium-252 fission 1454300100003 AUTHOR (J.A.Adams,R.R.Roy) 1454300100004 INSTITUTE (1USAASU) 1454300100005 REFERENCE (J,NSE,63,41,1977) 1454300100006 #NSR: 1977AD05 1454300100007 SAMPLE The source consists of a 2-mm-diam spot of 252Cf 1454300100008 deposited on a 2-mm-thick platinum disk. An 1454300100009 aluminum ring mount holds both the source disk and a 1454300100010 9 mg/cm2 thick nickel cover foil. The source has an 1454300100011 activity of 3.e5 fissions per minute. 1454300100012 DETECTOR (SIBAR,SILI,TELES) A two-detector particle telescope 1454300100013 of the deltaE,E- type is used for energy measurement 1454300100014 and identification of the light charged particles. The 1454300100015 deltaE detector is a 60 mu-m thick, 50 mm2 totally 1454300100016 depleted silicon surface barrier detector, held in a 1454300100017 transmission mount. A 2000 mu-m thick, 80 mm2 lithium 1454300100018 drifted silicon detector is used for the E detector. 1454300100019 MONITOR A 210Po alpha-particle source was used to calibrate the1454300100020 telescope system. The calibration was checked by using 1454300100021 the long-range fission alpha particles from 252Cf as a 1454300100022 secondary standard. 1454300100023 CORRECTION For source air and nickel foil energy loss, 1454300100024 the (n,p) particle telescope background, 1454300100025 protons simulated by alpha particles detected with 1454300100026 coincident gamma rays, 1454300100027 protons from 58Ni(n,p) and 58Ni(alpha,p) reactions 1454300100028 in the nickel cover foil, 1454300100029 protons from 14Ni(alpha,p) reaction in air trapped 1454300100030 beneath the nickel cover foil, 1454300100031 knock-on protons, from hydrogenous material on the 1454300100032 surface of the source or on the inner side of the 1454300100033 cover foil. 1454300100034 HISTORY (20190612C) OG. 1454300100035 ENDBIB 33 0 1454300100036 NOCOMMON 0 0 1454300100037 ENDSUBENT 36 0 1454300199999 SUBENT 14543002 20190612 14551454300200001 BIB 3 4 1454300200002 REACTION (98-CF-252(0,F)1-H-1,TER,FY/DE,,REL) 1454300200003 ERR-ANALYS No information on uncertainties. 1454300200004 STATUS (CURVE) Fig.5 from Nucl.Sci.Eng.,63,41,1977 digitized 1454300200005 by GSYS2.4.7. 1454300200006 ENDBIB 4 0 1454300200007 NOCOMMON 0 0 1454300200008 DATA 3 39 1454300200009 E-MIN E-MAX DATA 1454300200010 MEV MEV ARB-UNITS 1454300200011 3.1269 3.5056 0.000385 1454300200012 3.5056 3.9338 0.000436 1454300200013 3.9338 4.3066 0.000463 1454300200014 4.3066 4.7396 0.000340 1454300200015 4.7396 5.1253 0.000607 1454300200016 5.1253 5.5077 0.000683 1454300200017 5.5077 5.9206 0.000452 1454300200018 5.9206 6.3489 0.000564 1454300200019 6.3489 6.7422 0.000959 1454300200020 6.7422 7.1506 0.001140 1454300200021 7.1506 7.5115 0.001087 1454300200022 7.5115 7.9134 0.000843 1454300200023 7.9134 8.3126 0.000763 1454300200024 8.3126 8.7441 0.000820 1454300200025 8.7441 9.1300 0.000933 1454300200026 9.1300 9.5288 0.000789 1454300200027 9.5288 9.9347 0.000845 1454300200028 9.9347 10.2987 0.000782 1454300200029 10.2987 10.7284 0.000697 1454300200030 10.7284 11.1307 0.000656 1454300200031 11.1307 11.5058 0.000578 1454300200032 11.5058 11.9142 0.000538 1454300200033 11.9142 12.3095 0.000411 1454300200034 12.3095 12.7065 0.000379 1454300200035 12.7065 13.0964 0.000280 1454300200036 13.0964 13.4985 0.000226 1454300200037 13.4985 13.9045 0.000221 1454300200038 13.9045 14.2906 0.000232 1454300200039 14.2906 14.7046 0.000236 1454300200040 14.7046 15.0929 0.000131 1454300200041 15.0929 15.5023 0.000145 1454300200042 15.5023 15.8770 0.000095 1454300200043 15.8770 16.2814 0.000054 1454300200044 16.2814 16.6986 0.000058 1454300200045 16.6986 17.1395 0.000041 1454300200046 17.1395 17.5203 0.000044 1454300200047 17.5203 17.8890 0.000027 1454300200048 17.8890 18.2856 0.000035 1454300200049 18.2856 18.6502 0.000008 1454300200050 ENDDATA 41 0 1454300200051 ENDSUBENT 50 0 1454300299999 SUBENT 14543003 20190612 14551454300300001 BIB 4 18 1454300300002 REACTION 1((98-CF-252(0,F)1-H-1,TER,FY)/ 1454300300003 (98-CF-252(0,F)2-HE-4,TER,FY)) Polar+tripartition 1454300300004 2((98-CF-252(0,F)1-H-1,TER,FY,,MSC)/ 1454300300005 (98-CF-252(0,F)2-HE-4,TER,FY)) Polar yield 1454300300006 3((98-CF-252(0,F)1-H-1,TER,FY,,MSC)/ 1454300300007 (98-CF-252(0,F)2-HE-4,TER,FY)) Tripartition yield 1454300300008 Data Gaussian-fitted and extrapolated to include 1454300300009 entire energy range. 1454300300010 ANALYSIS Proton yield (% Long-Range Alpha Particles) due to 1454300300011 telescope (n,p) (0.39+-0.04)% 1454300300012 simulated (0.03+-0.01)% 1454300300013 58Ni(n,p) reaction (1.11+-0.06)% 1454300300014 58Ni(alpha,p) reaction (0.005+-0.001)% 1454300300015 14Ni(alpha,p) reaction (0.34+-0.05)% 1454300300016 knock-on protons (0.81+-0.23)% 1454300300017 ERR-ANALYS (DATA-ERR) No information on sources of uncertainties 1454300300018 STATUS (TABLE) Table I from Nucl.Sci.Eng.,63,41,1977 1454300300019 (DEP,14543002) 1454300300020 ENDBIB 18 0 1454300300021 NOCOMMON 0 0 1454300300022 DATA 6 1 1454300300023 DATA 1DATA-ERR 1DATA 2DATA-ERR 2DATA 3DATA-ERR 31454300300024 ARB-UNITS ARB-UNITS ARB-UNITS ARB-UNITS ARB-UNITS ARB-UNITS 1454300300025 1.89E-02 0.11E-02 0.84E-02 0.04E-02 1.05E-02 0.06E-021454300300026 ENDDATA 3 0 1454300300027 ENDSUBENT 26 0 1454300399999 SUBENT 14543004 20190612 14551454300400001 BIB 5 17 1454300400002 REACTION 1(98-CF-252(0,F)1-H-1,TER,KEP) Polar+tripartition 1454300400003 2(98-CF-252(0,F)1-H-1,TER,KEP,,MSC) Polar yield 1454300400004 3(98-CF-252(0,F)1-H-1,TER,KEP,,MSC) Tripartition yield 1454300400005 Most Probable Energy (FWHM) 1454300400006 MISC-COL (MISC1) Full width at half maximum (FWHM) for sum of 1454300400007 polar+tripartition 1454300400008 (MISC2) FWHM for polar yield 1454300400009 (MISC3) FWHM for tripartition yield 1454300400010 ERR-ANALYS (DATA-ERR) No information on sources of uncertainties 1454300400011 ANALYSIS Most Probable Energy and FWHM for protons due to 1454300400012 simulated MPE =3.0+-0.2 MeV, FWHM =0.6+-0.1 MeV 1454300400013 58Ni(n,p) MPE =4.3+-0.2 MeV, FWHM =3.4+-0.2 MeV 1454300400014 58Ni(alpha,p) MPE =2.8+-0.2 MeV 1454300400015 14Ni(alpha,p) MPE =4.4+-0.2 MeV, FWHM =1.5+-0.3 MeV 1454300400016 knock-on protons MPE =3.2+-0.3 MeV, FWHM =1.0+-0.3 MeV 1454300400017 STATUS (TABLE) Table I from Nucl.Sci.Eng.,63,41,1977 1454300400018 (DEP,14543002) 1454300400019 ENDBIB 17 0 1454300400020 NOCOMMON 0 0 1454300400021 DATA 12 1 1454300400022 DATA 1DATA-ERR 1DATA 2DATA-ERR 2DATA 3DATA-ERR 31454300400023 MISC1 MISC1-ERR MISC2 MISC2-ERR MISC3 MISC3-ERR 1454300400024 MEV MEV MEV MEV MEV MEV 1454300400025 MEV MEV MEV MEV MEV MEV 1454300400026 7.8 0.2 10.0 0.2 6.6 0.2 1454300400027 8.4 0.3 7.6 0.2 7.0 0.2 1454300400028 ENDDATA 6 0 1454300400029 ENDSUBENT 28 0 1454300499999 SUBENT 14543005 20190612 14551454300500001 BIB 3 5 1454300500002 REACTION 1(98-CF-252(0,F)1-H-1,TER,FY,,MSC) Polar yield 1454300500003 2(98-CF-252(0,F)1-H-1,TER,FY,,MSC) Tripartition yield 1454300500004 ERR-ANALYS (DATA-ERR) No information on sources of uncertainties 1454300500005 STATUS (TABLE) Text from Nucl.Sci.Eng.,63,41,1977,p.41. 1454300500006 (DEP,14543002) 1454300500007 ENDBIB 5 0 1454300500008 NOCOMMON 0 0 1454300500009 DATA 4 1 1454300500010 DATA 1DATA-ERR 1DATA 2DATA-ERR 2 1454300500011 PC/FIS PC/FIS PC/FIS PC/FIS 1454300500012 2.83E-03 0.18E-03 3.50E-03 0.20E-03 1454300500013 ENDDATA 3 0 1454300500014 ENDSUBENT 13 0 1454300599999 ENDENTRY 5 0 1454399999999