ENTRY M0483 20130624 M067M048300000001 SUBENT M0483001 20130624 M067M048300100001 BIB 17 37 M048300100002 TITLE The 90-degrees differential cross section for the M048300100003 reaction He-4(g,n0)He-3 and evidence for isospin M048300100004 mixing in the dipole states of He-4. M048300100005 AUTHOR (B.L.Berman,F.W.K.Firk,C.-P.Wu) M048300100006 REFERENCE (J,NP/A,179,791,1972) M048300100007 #doi:10.1016/0375-9474(72)90620-3 M048300100008 INSTITUTE (1USAYAL) M048300100009 FACILITY (LINAC,1USAYAL) M048300100010 INC-SOURCE (BRST) M048300100011 METHOD (TOF) Time-of-flight technique for neutron energy M048300100012 spectrum measurements. M048300100013 DETECTOR (SCIN) The 7.5 cm plastic scintillator 'Pilot-b'. M048300100014 SAMPLE The liquid-helium sample was contained in a long, M048300100015 thin-walled (20 micron) aluminium dewar, 7.5 cm in M048300100016 diameter. M048300100017 PART-DET (N) M048300100018 ANALYSIS The photoneutron energy spectrum was measured and M048300100019 used for obtaining of partial differential cross M048300100020 section using the data on the shape of the M048300100021 bremsstrahlung spectrum together with information M048300100022 about the energy dependence of neutron detector M048300100023 efficiency. The absolute cross section scale was M048300100024 determined with the aid of data on cross section of M048300100025 H-2(g,n) reaction. M048300100026 MONITOR (1-H-2(G,N)1-H-1,,SIG) M048300100027 MONIT-REF (,B.Weissman+,J,NP/A,174,129,1971) M048300100028 ERR-ANALYS (ERR-S) The statistical errors. M048300100029 (ERR-SYS) The systematic errors are only estimated M048300100030 to be about of +15 or -20%. M048300100031 COMMENT The differential cross sections for the ground state M048300100032 reaction He-4(g,n0)He-3 has been measured up to 32 M048300100033 MeV by the neutron time-of-flight technique. The M048300100034 peak absolute cross section is 110 mu-bn/sr. M048300100035 STATUS (CURVE) M048300100036 HISTORY (19910218C) M048300100037 (20130624A) Corrected by V.Varlamov: ERR-ANALYS, M048300100038 REACTION, STATUS. M048300100039 ENDBIB 37 0 M048300100040 COMMON 2 3 M048300100041 -ERR-SYS +ERR-SYS M048300100042 PER-CENT PER-CENT M048300100043 20. 15. M048300100044 ENDCOMMON 3 0 M048300100045 ENDSUBENT 44 0 M048300199999 SUBENT M0483002 20130624 M067M048300200001 BIB 2 2 M048300200002 REACTION (2-HE-4(G,N)2-HE-3,PAR,DA,,BRS) M048300200003 HISTORY (20130624A) Corrected by V.Varlamov: BRA -> BRS. M048300200004 ENDBIB 2 0 M048300200005 COMMON 2 3 M048300200006 ANG E-LVL M048300200007 ADEG MEV M048300200008 90. 0.0 M048300200009 ENDCOMMON 3 0 M048300200010 DATA 3 53 M048300200011 EN DATA ERR-S M048300200012 MEV MB/SR MB/SR M048300200013 22.1 .057 .003 M048300200014 22.2 .062 .003 M048300200015 22.3 .063 .002 M048300200016 22.4 .066 .002 M048300200017 22.5 .066 .003 M048300200018 22.6 .072 .002 M048300200019 22.7 .07 .002 M048300200020 22.8 .078 .001 M048300200021 23. .077 .001 M048300200022 23.2 .079 .001 M048300200023 23.4 .082 .001 M048300200024 23.6 .089 .001 M048300200025 23.8 .087 .001 M048300200026 24.2 .089 .001 M048300200027 24.4 .09 .001 M048300200028 24.6 .092 .001 M048300200029 24.8 .092 .001 M048300200030 25.1 .095 .001 M048300200031 25.3 .1 .002 M048300200032 25.5 .103 .002 M048300200033 25.7 .1 .002 M048300200034 25.9 .103 .002 M048300200035 26.1 .105 .001 M048300200036 26.2 .103 .002 M048300200037 26.4 .11 .001 M048300200038 26.5 .112 .001 M048300200039 26.6 .108 .001 M048300200040 26.7 .108 .002 M048300200041 26.8 .112 .002 M048300200042 27. .111 .001 M048300200043 27.2 .102 .001 M048300200044 27.35 .109 .001 M048300200045 27.45 .108 .002 M048300200046 27.70 .108 .002 M048300200047 27.85 .108 .002 M048300200048 28. .109 .002 M048300200049 28.2 .107 .002 M048300200050 28.4 .108 .002 M048300200051 28.6 .11 .002 M048300200052 28.8 .105 .002 M048300200053 29. .103 .002 M048300200054 29.25 .1 .002 M048300200055 29.5 .095 .002 M048300200056 29.75 .096 .002 M048300200057 30. .095 .002 M048300200058 30.25 .093 .002 M048300200059 30.5 .088 .002 M048300200060 30.75 .084 .002 M048300200061 31. .077 .002 M048300200062 31.33 .075 .002 M048300200063 31.66 .074 .002 M048300200064 32. .065 .003 M048300200065 32.3 .054 .004 M048300200066 ENDDATA 55 0 M048300200067 ENDSUBENT 66 0 M048300299999 ENDENTRY 2 0 M048399999999