ENTRY M0617 20160202 M081M061700000001 SUBENT M0617001 20160202 M081M061700100001 BIB 15 56 M061700100002 TITLE Triton angular distributions from the M061700100003 7Li(gamma,t)a reaction near threshold. M061700100004 AUTHOR (V.P.Likhachev,M.N.Martins,M.T.F.Da Cruz, M061700100005 J.D.T.Arruda-Neto,L.P.Geraldo,R.Semmler,J.F.Dias) M061700100006 REFERENCE (J,PR/C,59,525,1999) M061700100007 #doi:10.1103/PhysRevC.59.525 M061700100008 INSTITUTE (3BZLUSP,3BZLIPE) M061700100009 FACILITY (REAC,3BZLIPE) IPEN/CNEN-SP IAE-R1 research reactor. M061700100010 INC-SOURCE (MPH=(22-TI-0(N,G))) EG = 6.418 and 6.759 MeV M061700100011 (weighted average 6.56 MeV). M061700100012 (MPH=(28-NI-0(N,G))) EG = 8.533 and 8.998 MeV M061700100013 (weighted average 8.8 MeV). M061700100014 Monochromatic photons from neutron radiative capture M061700100015 reactions. M061700100016 SAMPLE The target consists of a 45x70 mm**2, self-supporting M061700100017 metallic natural lithium foil (92.5% 7Li and 7.5% M061700100018 6Li), 100 or 50 micron thick (depending on the photon M061700100019 energy). M061700100020 DETECTOR (SILI) Seven silicon strip detectors. M061700100021 The distance from the detector to the center of the M061700100022 target was 17 cm, with full detector (all 16 strips) M061700100023 solid angle of 0.09 sr. the detector angular M061700100024 acceptance (for a point target) was +- 8.4 degree. M061700100025 METHOD (EXTB) M061700100026 ANALYSIS Direct measurements. M061700100027 At Eg = 6.56 MeV sum 20% of intensity is distributed M061700100028 among several low intensity lines. M061700100029 At Eg = 8.8 MeV sum 25% of intensity is distributed M061700100030 among several low intensity lines. M061700100031 The background from the reaction n + 6Li -> t + a M061700100032 caused by neutrons from both beam contamination and M061700100033 background in the experimental area was evaluated and M061700100034 subtracted. M061700100035 ERR-ANALYS (DATA-ERR) Mean-root-square errors. Bands were M061700100036 obtained by reconstructing the differential cross M061700100037 sections from the published Legendre coefficients. M061700100038 CORRECTION Measured angular distributions were normalized to M061700100039 unity at the angle = 90 deg. M061700100040 COMMENT Angular distributions of tritons emitted in the M061700100041 reaction 7Li(g,t)a have been measured for two photon M061700100042 energy intervals (6.4 - 6.7 and 8.5 - 9.0 MeV), and M061700100043 theta-t between 30 and 150 deg. Monochromatic photons M061700100044 from neutron capture reactions of the IPEN/CNEN-SP M061700100045 IEA-R1 research reactor were used. The measured data M061700100046 were analyzed in the framework of an alpha-cluster M061700100047 model for the 7Li structure. Results are in good M061700100048 agreement with a recent measurement of the azimuthal M061700100049 cross section asymmetry. M061700100050 STATUS (TABLE) Received from M.N.Martins. M061700100051 (APRVD) Approved by M.N.Martins. M061700100052 HISTORY (20010208C) Data were compiled at the Russia MSU SINP M061700100053 CDFE by V.Varlamov. M061700100054 (20110119A) Corrected by V.Varlamov: NOCOMMON, M061700100055 INC-SOURCE, lowercase. M061700100056 (20160202A) Corrected by V.Varlamov: REACTION, STATUS, M061700100057 typos. M061700100058 ENDBIB 56 0 M061700100059 NOCOMMON 0 0 M061700100060 ENDSUBENT 59 0 M061700199999 SUBENT M0617002 20160202 M081M061700200001 BIB 1 2 M061700200002 REACTION (3-LI-7(G,T)2-HE-4,,DA,,REL) see fig.4 M061700200003 Normalized to unity at angle = 90 deg. M061700200004 ENDBIB 2 0 M061700200005 COMMON 3 3 M061700200006 EN-MEAN EN-MIN EN-MAX M061700200007 MEV MEV MEV M061700200008 6.56 6.418 6.759 M061700200009 ENDCOMMON 3 0 M061700200010 DATA 3 7 M061700200011 ANG DATA DATA-ERR M061700200012 ADEG ARB-UNITS ARB-UNITS M061700200013 30. .92 .04 M061700200014 50. .96 .04 M061700200015 70. .95 .04 M061700200016 90. 1. .04 M061700200017 110. 1.02 .04 M061700200018 130. .94 .04 M061700200019 150. .85 .03 M061700200020 ENDDATA 9 0 M061700200021 ENDSUBENT 20 0 M061700299999 SUBENT M0617003 20160202 M081M061700300001 BIB 1 2 M061700300002 REACTION (3-LI-7(G,T)2-HE-4,,DA,,REL) see fig.5 M061700300003 Normalized to unity at angle = 90 deg. M061700300004 ENDBIB 2 0 M061700300005 COMMON 3 3 M061700300006 EN-MEAN EN-MIN EN-MAX M061700300007 MEV MEV MEV M061700300008 8.8 8.533 8.998 M061700300009 ENDCOMMON 3 0 M061700300010 DATA 3 7 M061700300011 ANG DATA DATA-ERR M061700300012 ADEG ARB-UNITS ARB-UNITS M061700300013 30. .6 .03 M061700300014 50. .7 .04 M061700300015 70. .92 .05 M061700300016 90. 1. .05 M061700300017 110. .8 .04 M061700300018 130. .8 .04 M061700300019 150. .7 .04 M061700300020 ENDDATA 9 0 M061700300021 ENDSUBENT 20 0 M061700399999 ENDENTRY 3 0 M061799999999