ENTRY            23284   20151215                             22482328400000001 
SUBENT        23284001   20151215                             22482328400100001 
BIB                 16         65                                 2328400100002 
TITLE      Quasi-stellar neutrons from the 7Li( p,n)7Be reaction  2328400100003 
           with an energy-broadened proton beam.                  2328400100004 
AUTHOR     (G.Feinberg, M.Friedman, A.Krasa, A.Shor, Y.Eisen,     2328400100005 
           D.Berkovits, D.Cohen, G.Giorginis, T.Hirsh, M.Paul,    2328400100006 
           A.J.M.Plompen, E.Tsuk)                                 2328400100007 
INSTITUTE  (2ZZZGEL) A.Krasa, G.Giorginis, A.J.M.Plompen          2328400100008 
           (3ISLSOR) G.Feinberg,A.Shor,Y.Eisen,D.Berkovits,T.Hirsh2328400100009 
           (3ISLHEB) G.Feinberg,M.Friedman,D.Cohen,M.Paul,E.Tsuk  2328400100010 
REFERENCE  (J,PR/C,85,055810,2012)                                2328400100011 
           #doi:10.1103/PhysRevC.85.055810                        2328400100012 
REL-REF    (O,O1983001,G.Feinberg+,J,PR/C,85,055810,2012)         2328400100013 
             Proton-induced data of neutron spectra.              2328400100014 
FACILITY   (VDGT,2ZZZGEL) 7-MV Van de Graaff accelerator at IRMM. 2328400100015 
           Operated in pulsed mode with frequency 625 kHz.        2328400100016 
INC-SOURCE (P-LI7) 7Li(p,n) reaction on LiF target of 6mm diameter2328400100017 
           prepared by evaporation on a 1-mm thick Cu disk of     2328400100018 
           40.7 mm diameter. Bunched and chopped proton beam,     2328400100019 
           proton energy 1912 keV.                                2328400100020 
           The LiF layer thickness was determined by weighing to  2328400100021 
           be 1-2 mg/cm**2.                                       2328400100022 
           Proton beam pulse width 1.5-2 ns(FWHM) .               2328400100023 
DETECTOR   (GLASD) Two 6Li-glass detectors - for incident neutron 2328400100024 
           detection.                                             2328400100025 
           (LONGC) Long counter (54cm x 35.6cm diameter) for      2328400100026 
            neutron monitoring.                                   2328400100027 
           (NAICR) NaI detector (4in x 4in diameter) for gamma    2328400100028 
           monitoring.                                            2328400100029 
           (HPGE) HPGe detector of 100% relative efficiency to    2328400100030 
           measure induced Be-7 and Au-198 activity.              2328400100031 
           Efficiency was measured by standard point sources,     2328400100032 
           estimated uncertainty of absolute efficiencies ~2% .   2328400100033 
METHOD     (TOF) For incident neutron energy measurement.         2328400100034 
           (ACTIV) Gold activation measurement for both beams.    2328400100035 
MONITOR    (3-LI-7(P,N)4-BE-7,,SIG)                               2328400100036 
            Be-7 induced activity was measured.                   2328400100037 
DECAY-MON  (4-BE-7,53.229D,DG,477.6,0.1044)                       2328400100038 
            53.22+-0.06 d, 10.44+-0.04 %                          2328400100039 
DECAY-DATA (79-AU-198-G,2.6948D,DG,411.8,0.9556)                  2328400100040 
COMMENT     Authors use the term "broad-energy proton beam" for   2328400100041 
           protons that impinge on the LiF target after a gold    2328400100042 
           degrader foil in case of an incident energy of         2328400100043 
           2096.5 keV before the degrader and use the term        2328400100044 
            "narrow-energy proton beam" for a proton beam of      2328400100045 
           1912 keV directly from the Van de Graaff accelerator.  2328400100046 
CORRECTION For the solid angle subtended by the Au sample.        2328400100047 
           For the neutron scattering in the Cu target backing.   2328400100048 
           For the planar geometry of the Au sample.              2328400100049 
           The photon attenuation correction due to               2328400100050 
           self-absorption in the target.                         2328400100051 
           Correction factors:                                    2328400100052 
                                 for attenuation  for geometry    2328400100053 
           narrow energy Be7        100.               100.       2328400100054 
           narrow energy, Au #1      99.1              98.0       2328400100055 
           narrow energy, Au #2                        97.5       2328400100056 
           broad energy Be7         100.               100.       2328400100057 
           broad energy, Au #1                         98.0       2328400100058 
           broad energy, Au #2                         97.5       2328400100059 
                               for activities on planer Au sample 2328400100060 
                                   narrow energy     broad energy 2328400100061 
           Au #1 (angle < 84 deg)   1.25+-0.03         1.41+-0.04 2328400100062 
           Au #2 (angle < 66 deg)   1.16+-0.03         1.10+-0.03 2328400100063 
ANALYSIS    kT=28 keV was determined by best fit of measured      2328400100064 
           neutron spectra at 8 keV < En < 80 keV for broad and   2328400100065 
           narrow proton energy spectra.                          2328400100066 
HISTORY    (20151215C) M.M.                                       2328400100067 
ENDBIB              65          0                                 2328400100068 
COMMON               3          3                                 2328400100069 
ERR-HL     ERR-IDD    KT                                          2328400100070 
D          NO-DIM     KEV                                         2328400100071 
 0.0012      0.0004    28.                                        2328400100072 
ENDCOMMON            3          0                                 2328400100073 
ENDSUBENT           72          0                                 2328400199999 
SUBENT        23284002   20151215                             22482328400200001 
BIB                  6         28                                 2328400200002 
REACTION   (79-AU-197(N,G)79-AU-198,,SIG,,MXW) MACS               2328400200003 
INC-SOURCE Standard deviation for proton energy distribution      2328400200004 
           ~1.5 keV for narrow-energy beam .                      2328400200005 
SAMPLE     Au flat samples:                                       2328400200006 
            #1 : LiF target-Au sample distance 1.0 mm,            2328400200007 
                 diameter 18.05mm,                                2328400200008 
                 detector angle 84 deg,                           2328400200009 
                 weight 229.3mg,                                  2328400200010 
                 atomic thickness (2.74+-0.01)*10**20 1/cm2 .     2328400200011 
            #2 : LiF target-Au sample distance 5.0 mm,            2328400200012 
                 diameter 22.07 mm,                               2328400200013 
                 detector angle 66 deg,                           2328400200014 
                 weight 327.7 mg,                                 2328400200015 
                 atomic thickness (2.62+-0.01)*10**20 1/cm2 .     2328400200016 
ERR-ANALYS (ERR-T) Total uncertainty 2.7% (#1) - 2.9 % (#2).      2328400200017 
            Considered uncertainties:                             2328400200018 
           (ERR-S) Counting statistics for Au198 activity         2328400200019 
           (ERR-1) Be7 activity - 0.9%                            2328400200020 
           (ERR-2) Energy dependence of photopeak efficiency -0.5%2328400200021 
           (ERR-3) Sample thickness - 0.2% .                      2328400200022 
           (ERR-4) Correction factors for activities of planar    2328400200023 
                   gold sample - 2.5% .                           2328400200024 
FLAG       (1.) Sample Au #1 (angle < 84 deg)                     2328400200025 
           (2.) Sample Au #2 (angle < 66 deg)                     2328400200026 
STATUS     (TABLE) Tables VII ( data) , VIII(uncertainties) of    2328400200027 
            PR/C,85,055810,2012                                   2328400200028 
           (DEP,O1983005) Neutron spectrum.                       2328400200029 
           (COREL,23284003) Measurement at broad-energy beam      2328400200030 
ENDBIB              28          0                                 2328400200031 
COMMON               4          3                                 2328400200032 
ERR-1      ERR-2      ERR-3      ERR-4                            2328400200033 
PER-CENT   PER-CENT   PER-CENT   PER-CENT                         2328400200034 
 0.9        0.5       0.2        2.5                              2328400200035 
ENDCOMMON            3          0                                 2328400200036 
DATA                 4          2                                 2328400200037 
DATA       ERR-T      ERR-S      FLAG                             2328400200038 
MB         MB         PER-CENT   NO-DIM                           2328400200039 
608.       17.        0.4        1.                               2328400200040 
626.       18.        0.9        2.                               2328400200041 
ENDDATA              4          0                                 2328400200042 
ENDSUBENT           41          0                                 2328400299999 
SUBENT        23284003   20151215                             22482328400300001 
BIB                  6         29                                 2328400300002 
REACTION   (79-AU-197(N,G)79-AU-198,,SIG,,MXW) MACS               2328400300003 
INC-SOURCE Standard deviation for proton energy distribution      2328400300004 
           ~20 keV for broad-energy beam, obtained by gold        2328400300005 
            degrader of 2 microm thickness.                       2328400300006 
SAMPLE     Au flat samples:                                       2328400300007 
            #1 : LiF target-Au sample distance 1.0mm,             2328400300008 
                 diameter 18.06mm,                                2328400300009 
                 detector angle 84 deg,                           2328400300010 
                 weight 229.5mg,                                  2328400300011 
                 atomic thickness (2.74+-0.01)*10**20 1/cm2 .     2328400300012 
            #2 : LiF target-Au sample distance 5.0 mm,            2328400300013 
                 diameter 22.06 mm,                               2328400300014 
                 detector angle 66 deg,                           2328400300015 
                 weight 330.0 mg,                                 2328400300016 
                 atomic thickness (2.64+-0.01)*10**20 1/cm2 .     2328400300017 
ERR-ANALYS (ERR-T) Total uncertainty 2.6% (#1) - 2.7 % (#2).      2328400300018 
            Considered uncertainties:                             2328400300019 
           (ERR-S) Counting statistics for Au198 activity         2328400300020 
           (ERR-1) Be7 activity - 0.7%                            2328400300021 
           (ERR-2) Energy dependence of photopeak efficiency -0.5%2328400300022 
           (ERR-3) Sample thickness - 0.2% .                      2328400300023 
           (ERR-4) Correction factors for activities of planar    2328400300024 
                   gold sample - 2.5% .                           2328400300025 
FLAG       (1.) Sample Au #1 (angle < 84 deg)                     2328400300026 
           (2.) Sample Au #2 (angle < 66 deg)                     2328400300027 
STATUS     (TABLE) Tables VII ( data) , VIII(uncertainties) of    2328400300028 
            PR/C,85,055810,2012                                   2328400300029 
           (DEP,O1983003) Neutron spectrum.                       2328400300030 
           (COREL,23284002) Measurement at narrow-energy beam     2328400300031 
ENDBIB              29          0                                 2328400300032 
COMMON               4          3                                 2328400300033 
ERR-1      ERR-2      ERR-3      ERR-4                            2328400300034 
PER-CENT   PER-CENT   PER-CENT   PER-CENT                         2328400300035 
 0.7        0.5       0.2        2.5                              2328400300036 
ENDCOMMON            3          0                                 2328400300037 
DATA                 4          2                                 2328400300038 
DATA       ERR-T      ERR-S      FLAG                             2328400300039 
MB         MB         PER-CENT   NO-DIM                           2328400300040 
620.       17.         0.5       1.                               2328400300041 
619.       17.         0.7       2.                               2328400300042 
ENDDATA              4          0                                 2328400300043 
ENDSUBENT           42          0                                 2328400399999 
SUBENT        23284004   20151215                             22482328400400001 
BIB                  5          8                                 2328400400002 
REACTION   (79-AU-197(N,G)79-AU-198,,SIG,,MXW) MACS               2328400400003 
ANALYSIS   Average for two samples.                               2328400400004 
INC-SOURCE Standard deviation for proton energy distribution      2328400400005 
           ~1.5keV for narrow-energy beam .                       2328400400006 
ERR-ANALYS (DATA-ERR) Total uncertainty .                         2328400400007 
STATUS     (TABLE) Tables VII, IX of PR/C,85,055810,2012          2328400400008 
           (DEP,23248002) Data for two samples.                   2328400400009 
           (COREL,23284005) Measurement at broad-energy beam      2328400400010 
ENDBIB               8          0                                 2328400400011 
NOCOMMON             0          0                                 2328400400012 
DATA                 2          1                                 2328400400013 
DATA       DATA-ERR                                               2328400400014 
MB         MB                                                     2328400400015 
 616.       17.                                                   2328400400016 
ENDDATA              3          0                                 2328400400017 
ENDSUBENT           16          0                                 2328400499999 
SUBENT        23284005   20151215                             22482328400500001 
BIB                  4          8                                 2328400500002 
REACTION   (79-AU-197(N,G)79-AU-198,,SIG,,MXW) MACS               2328400500003 
INC-SOURCE Standard deviation for proton energy distribution      2328400500004 
           ~20 keV for broad-energy beam, obtained by gold        2328400500005 
            degrader of 2 microm thickness.                       2328400500006 
ERR-ANALYS (DATA-ERR) Total uncertainty                           2328400500007 
STATUS     (TABLE) Tables VII, IX of PR/C,85,055810,2012          2328400500008 
           (DEP,23248003) Data for two samples.                   2328400500009 
           (COREL,23284004) Measurement at narrow-energy beam     2328400500010 
ENDBIB               8          0                                 2328400500011 
NOCOMMON             0          0                                 2328400500012 
DATA                 2          1                                 2328400500013 
DATA       DATA-ERR                                               2328400500014 
MB         MB                                                     2328400500015 
620.       16.                                                    2328400500016 
ENDDATA              3          0                                 2328400500017 
ENDSUBENT           16          0                                 2328400599999 
ENDENTRY             5          0                                 2328499999999