ENTRY O2363 20180304 O064O236300000001 SUBENT O2363001 20180304 O064O236300100001 BIB 11 38 O236300100002 TITLE Excitation function shape and neutron spectrum of the O236300100003 7Li(p,n)7Be reaction near threshold O236300100004 AUTHOR (G.Martin-Hernandez,P.Mastinu, M.Maggiore,L.Pranovi, O236300100005 G.Prete, J.Praena,R.Capote-Noy,F.Gramegna, A.Lombardi, O236300100006 L.Maran,C.Scian,E.Munaron) O236300100007 INSTITUTE (3CUBPLY,2ITYPAD,3ZZZIAE) O236300100008 (2SPNSPN) Centro Nacional de Aceleradores, Sevilla O236300100009 REFERENCE (J,PR/C,94,034620,2016) O236300100010 #doi:10.1103/PhysRevC.94.034620 O236300100011 FACILITY (VDG,2ITYPAD) O236300100012 SAMPLE The target consisted of a layer of Li between two 100 O236300100013 micron thick Cu disks. The Li layer was thick enough O236300100014 to reduce the proton energy below the reaction O236300100015 threshold. The target was water cooled. O236300100016 DETECTOR (BAF2) The detector consisted of a neutron-gamma O236300100017 converter and a BaF2 scintillator. The neutron-gamma O236300100018 converter was highly enriched (>99%) B-10 powder, O236300100019 encapsulated in a 100 mm diameter and 10 mm thick O236300100020 conical carbon fiber container. The scintillating O236300100021 crystal had a diameter of 100 mm and a thickness of O236300100022 30 mm. O236300100023 METHOD (EXTB,SITA,TOF) The forward emitted (+/-4 degrees) O236300100024 low energy tail (2-22 keV) of the neutron spectrum O236300100025 from the 7Li(p,n)7Be reaction was studied at proton O236300100026 energy of 1893.6 keV. The neutrons were detected by a O236300100027 BaF2 detector, positioned at 690 mm from the target O236300100028 at zero degree. The trigger for the ToF measurement O236300100029 was provided by the BaF2 detector, while the time O236300100030 reference was based on the signal of a capacitive O236300100031 pickup placed just before the target to detect the O236300100032 bombarding proton bunch. The signals for the BaF2 O236300100033 detector and the pickup were digitized by a CAEN O236300100034 DT5751 digitizer and stored in list-mode format for O236300100035 off-line analysis. O236300100036 ERR-ANALYS (ERR-1,1.,2.) Detection efficiency (1-2%) O236300100037 ADD-RES (COMP) Results were compared to theoretical O236300100038 calculations. O236300100039 HISTORY (20180225C) MPT O236300100040 ENDBIB 38 0 O236300100041 NOCOMMON 0 0 O236300100042 ENDSUBENT 41 0 O236300199999 SUBENT O2363002 20180304 O064O236300200001 BIB 3 3 O236300200002 REACTION (3-LI-7(P,N)4-BE-7,,MLT/DE,,TT/REL) O236300200003 STATUS (TABLE) Fig. 10., Data were obtained from AUTHOR. O236300200004 ERR-ANALYS (DATA-ERR) No detailed error analysis was provided. O236300200005 ENDBIB 3 0 O236300200006 COMMON 2 3 O236300200007 EN EN-ERR O236300200008 KEV KEV O236300200009 1893.6 0.2 O236300200010 ENDCOMMON 3 0 O236300200011 DATA 3 97 O236300200012 E DATA DATA-ERR O236300200013 KEV ARB-UNITS ARB-UNITS O236300200014 1.3445 -5.78E+03 2.72E+04 O236300200015 1.3840 1.55E+04 2.64E+04 O236300200016 1.4245 -4.13E+03 2.57E+04 O236300200017 1.4660 1.22E+04 2.50E+04 O236300200018 1.5090 -6.86E+03 2.37E+04 O236300200019 1.5535 -1.79E+04 2.30E+04 O236300200020 1.5990 4.98E+03 2.25E+04 O236300200021 1.6460 1.90E+03 2.14E+04 O236300200022 1.6945 -2.96E+04 2.07E+04 O236300200023 1.7440 -1.22E+04 2.03E+04 O236300200024 1.7950 1.69E+03 1.97E+04 O236300200025 1.8480 1.94E+02 1.88E+04 O236300200026 1.9025 -1.57E+03 1.84E+04 O236300200027 1.9585 2.70E+03 1.77E+04 O236300200028 2.0160 -5.45E+03 1.73E+04 O236300200029 2.0750 -5.76E+03 1.67E+04 O236300200030 2.1360 1.73E+04 1.62E+04 O236300200031 2.1990 -1.46E+03 1.57E+04 O236300200032 2.2635 2.84E+03 1.54E+04 O236300200033 2.3300 1.01E+04 1.46E+04 O236300200034 2.3990 6.80E+03 1.41E+04 O236300200035 2.4695 -7.17E+03 1.39E+04 O236300200036 2.5420 7.85E+03 1.34E+04 O236300200037 2.6170 1.11E+04 1.30E+04 O236300200038 2.6940 1.45E+04 1.25E+04 O236300200039 2.7735 1.09E+04 1.22E+04 O236300200040 2.8555 -5.03E+03 1.17E+04 O236300200041 2.9395 -2.73E+03 1.14E+04 O236300200042 3.0260 3.20E+02 1.10E+04 O236300200043 3.1155 8.48E+03 1.07E+04 O236300200044 3.2075 1.43E+04 1.05E+04 O236300200045 3.3020 7.07E+03 1.01E+04 O236300200046 3.3995 5.78E+03 9.78E+03 O236300200047 3.5000 5.65E+03 9.38E+03 O236300200048 3.6035 -1.48E+02 9.19E+03 O236300200049 3.7100 1.08E+04 8.97E+03 O236300200050 3.8195 1.31E+04 8.73E+03 O236300200051 3.9320 1.78E+04 8.45E+03 O236300200052 4.0480 9.13E+03 8.21E+03 O236300200053 4.1680 2.11E+04 7.98E+03 O236300200054 4.2915 2.28E+04 7.81E+03 O236300200055 4.4185 2.26E+04 7.60E+03 O236300200056 4.5495 2.29E+04 7.31E+03 O236300200057 4.6840 3.32E+04 7.22E+03 O236300200058 4.8225 3.12E+04 7.01E+03 O236300200059 4.9655 4.11E+04 6.86E+03 O236300200060 5.1130 5.14E+04 6.77E+03 O236300200061 5.2650 5.89E+04 6.65E+03 O236300200062 5.4215 6.59E+04 6.54E+03 O236300200063 5.5825 7.89E+04 6.51E+03 O236300200064 5.7480 8.83E+04 6.40E+03 O236300200065 5.9190 1.01E+05 6.33E+03 O236300200066 6.0950 1.13E+05 6.30E+03 O236300200067 6.2760 1.09E+05 6.14E+03 O236300200068 6.4630 1.18E+05 6.03E+03 O236300200069 6.6555 1.21E+05 5.99E+03 O236300200070 6.8540 1.23E+05 5.85E+03 O236300200071 7.0585 1.38E+05 5.88E+03 O236300200072 7.2690 1.49E+05 6.00E+03 O236300200073 7.4865 1.49E+05 5.76E+03 O236300200074 7.7105 1.40E+05 5.56E+03 O236300200075 7.9410 1.55E+05 5.69E+03 O236300200076 8.1785 1.63E+05 5.60E+03 O236300200077 8.4235 1.63E+05 5.49E+03 O236300200078 8.6760 1.72E+05 5.53E+03 O236300200079 8.9360 1.82E+05 5.52E+03 O236300200080 9.2040 1.85E+05 5.50E+03 O236300200081 9.4805 1.88E+05 5.41E+03 O236300200082 9.7655 1.95E+05 5.45E+03 O236300200083 10.0595 1.92E+05 5.41E+03 O236300200084 10.3625 2.07E+05 5.58E+03 O236300200085 10.6745 2.14E+05 5.57E+03 O236300200086 10.9965 2.17E+05 5.52E+03 O236300200087 11.3290 2.24E+05 5.50E+03 O236300200088 11.6715 2.35E+05 5.65E+03 O236300200089 12.0245 2.36E+05 5.55E+03 O236300200090 12.3890 2.38E+05 5.52E+03 O236300200091 12.7645 2.35E+05 5.43E+03 O236300200092 13.1520 2.38E+05 5.45E+03 O236300200093 13.5515 2.49E+05 5.55E+03 O236300200094 13.9635 2.55E+05 5.76E+03 O236300200095 14.3890 2.58E+05 5.65E+03 O236300200096 14.8280 2.66E+05 5.72E+03 O236300200097 15.2810 2.72E+05 5.86E+03 O236300200098 15.7480 2.77E+05 5.84E+03 O236300200099 16.2300 2.87E+05 5.96E+03 O236300200100 16.7275 2.99E+05 6.13E+03 O236300200101 17.2410 3.10E+05 6.29E+03 O236300200102 17.7710 3.10E+05 6.28E+03 O236300200103 18.3180 3.19E+05 6.39E+03 O236300200104 18.8830 3.32E+05 6.60E+03 O236300200105 19.4665 3.42E+05 6.74E+03 O236300200106 20.0690 3.58E+05 7.02E+03 O236300200107 20.6910 3.71E+05 7.20E+03 O236300200108 21.3335 3.80E+05 7.38E+03 O236300200109 21.9970 3.88E+05 7.52E+03 O236300200110 22.6825 3.96E+05 7.65E+03 O236300200111 ENDDATA 99 0 O236300200112 ENDSUBENT 111 0 O236300299999 SUBENT O2363003 20180304 O064O236300300001 BIB 5 18 O236300300002 REACTION (3-LI-7(P,N)4-BE-7,,DA,,4PI) O236300300003 STATUS (TABLE) Fig. 11., Data were obtained from AUTHOR. O236300300004 ERR-ANALYS (DATA-ERR) No detailed error analysis was provided. O236300300005 ANALYSIS (4PI1A) At near threshold energies the reaction is O236300300006 reported to be isotropic in the center-of-mass frame. O236300300007 Therefore, the total cross section can be expressed O236300300008 as 4*Pi times the zero degree center-of-mass cross O236300300009 section (see Eq. 4 of Reference). The difficulty O236300300010 arises from the fact that near the threshold energy O236300300011 two neutron energies can be assigned to one proton O236300300012 energy, which is reflected in the yield factor (see O236300300013 Eq. 5 of Ref.). However, using only the low-energy O236300300014 tail of the yield function with the measured neutron O236300300015 spectra the shape of the (p,n) cross section curve O236300300016 can be determined. Proton energies were calculated O236300300017 from neutron energies using the reaction kinematics. O236300300018 COMMENT Data is presented as normalized to Macklin and O236300300019 Gibbons, J, PR,109,105,1958 O236300300020 ENDBIB 18 0 O236300300021 COMMON 1 3 O236300300022 ANG-CM O236300300023 ADEG O236300300024 0. O236300300025 ENDCOMMON 3 0 O236300300026 DATA 3 35 O236300300027 EN DATA DATA-ERR O236300300028 KEV B B O236300300029 1880.750 0.06439 0.00141 O236300300030 1880.848 0.07358 0.00161 O236300300031 1880.960 0.08146 0.00172 O236300300032 1881.084 0.08909 0.00189 O236300300033 1881.220 0.09676 0.00206 O236300300034 1881.367 0.10401 0.00226 O236300300035 1881.525 0.11089 0.00242 O236300300036 1881.692 0.11634 0.00259 O236300300037 1881.870 0.11976 0.00269 O236300300038 1882.056 0.12523 0.00285 O236300300039 1882.250 0.12869 0.00302 O236300300040 1882.452 0.13346 0.00314 O236300300041 1882.662 0.14216 0.00344 O236300300042 1882.878 0.14552 0.00344 O236300300043 1883.102 0.14776 0.00356 O236300300044 1883.331 0.15057 0.00368 O236300300045 1883.566 0.15606 0.00401 O236300300046 1883.806 0.16011 0.00421 O236300300047 1884.051 0.16346 0.00455 O236300300048 1884.301 0.16922 0.00464 O236300300049 1884.555 0.17255 0.00518 O236300300050 1884.813 0.17276 0.00527 O236300300051 1885.075 0.17764 0.00526 O236300300052 1885.340 0.18750 0.00570 O236300300053 1885.609 0.19360 0.00618 O236300300054 1885.880 0.20132 0.00665 O236300300055 1886.154 0.19858 0.00783 O236300300056 1886.430 0.19968 0.00768 O236300300057 1886.709 0.20426 0.00767 O236300300058 1886.989 0.20466 0.00895 O236300300059 1887.271 0.19658 0.00893 O236300300060 1887.554 0.20663 0.00790 O236300300061 1887.839 0.20530 0.00927 O236300300062 1888.125 0.20968 0.00812 O236300300063 1888.411 0.21285 0.01159 O236300300064 ENDDATA 37 0 O236300300065 ENDSUBENT 64 0 O236300399999 ENDENTRY 3 0 O236399999999