ENTRY M0668 20050221 0000M066800000001 SUBENT M0668001 20050221 0000M066800100001 BIB 14 47 M066800100002 TITLE Photodisintegration of deuterium and Big Bang M066800100003 nucleosynthesis. M066800100004 AUTHOR (K.Y.HARA,H.UTSUNOMIYA,S.GOKO,H.AKIMUNE,T.YAMAGATA, M066800100005 M.OHTA,H.TOYOKAWA,K.KUDO,A.URITANI,Y.SHIBATA, M066800100006 Y.-W.LUI,H.OHGAKI) M066800100007 REFERENCE (J,PR/D,68,072001,2003) M066800100008 (J,NP/A,738,136,2004) M066800100009 INSTITUTE (2JPNKON,2JPNKTO,2JPNAIS,1USATAM) M066800100010 FACILITY (ESTRG,2JPNAIS) Electron storage ring TERAS at the M066800100011 National Institute of Advanced Industrial Science M066800100012 and Technology (AIST). M066800100013 INC-SOURCE (QMPH,COMPT) The laser Compton scattering (LCS) beam M066800100014 developed at the National Institute of Advanced M066800100015 Industrial Science and Technology (AIST). M066800100016 DETECTOR (PROPC) M066800100017 METHOD (RINGR) 16 3He proportional counters (EURISYS MESURES M066800100018 96NH45) embeded in a polyethilene moderator; two M066800100019 sets of eight counters are mounted in double M066800100020 concentric rings at 7 and 10 cm, respectively, from M066800100021 the beam axis. M066800100022 SAMPLE Heavy water filled a 4.0 cm long cylindrical M066800100023 container made of aluminium with 50-micron Mylar M066800100024 foils being entrance and exit windows. The purity of M066800100025 the heavy water was determined to be 97 (1) % with M066800100026 NMR spectrometer. M066800100027 ANALYSIS Direct measurement. M066800100028 ERR-ANALYS (DATA-ERR) Statistical errors. M066800100029 (ERR-1) Systematic errors. The systematic uncertainty M066800100030 has three sources: M066800100031 - the neutron emission rate of 252Cf source used for M066800100032 neutron detection efficiency measurement (~ 5 %), M066800100033 - the total flux of the LCS g-rays (~ 3 %), M066800100034 - angular distribution of neutrons (~ 2 %). M066800100035 The overall systematic uncertainty is 6.2 % after M066800100036 adding three sources in quadrature. M066800100037 COMMENT Photodisintegration cross sections were measured for M066800100038 deuterium with Laser-Compton scattering g-beams at M066800100039 seven energies near threshold. Combined with the M066800100040 preceding data, R(E) = Na SIG V for the p(n,g)D M066800100041 reaction is for the first time evaluated based on M066800100042 experimental data with 6% uncertainty in the energy M066800100043 region relevant to the Big Bang nucleosynthesis M066800100044 (BBN). The result confirms the theoretical M066800100045 evaluation on which the BBN in the precision era M066800100046 relies. M066800100047 STATUS (TABLE) The data are published in digital form. M066800100048 HISTORY (20050218C) M066800100049 ENDBIB 47 0 M066800100050 NOCOMMON 0 0 M066800100051 ENDSUBENT 50 0 M066800199999 SUBENT M0668002 20050221 0000M066800200001 BIB 1 1 M066800200002 REACTION (1-H-2(G,N)1-H-1,,SIG) M066800200003 ENDBIB 1 0 M066800200004 NOCOMMON 0 0 M066800200005 DATA 5 7 M066800200006 EN EN-RSL DATA DATA-ERR ERR-1 M066800200007 MEV KEV MB MB MB M066800200008 2.33 18. .683 .0535 .042 M066800200009 2.52 18. .983 .039 .061 M066800200010 2.79 22. 1.47 .03 .09 M066800200011 3.23 50. 2.04 .04 .13 M066800200012 3.69 42. 2.29 .04 .14 M066800200013 4.53 88. 2.48 .04 .15 M066800200014 4.58 60. 2.41 .02 .15 M066800200015 ENDDATA 9 0 M066800200016 ENDSUBENT 15 0 M066800299999 ENDENTRY 2 0 M066899999999