ENTRY L0271 20210329 L047L027100000001 SUBENT L0271001 20210329 L047L027100100001 BIB 12 51 L027100100002 TITLE First measurement of the asymmetry and the L027100100003 Gerasimov-Drell-Hearn integrand from the 3He(gamma,p)2HL027100100004 reaction at an incident photon energy of 29 MeV L027100100005 AUTHOR (G.Laskaris,W.Ji,X.Yan,J.Zhou,W.R.Zimmerman,M.W.Ahmed, L027100100006 T.Averett,A.Deltuva,A.C.Fonseca,H.Gao,J.Golak, L027100100007 A.Kafkarkou,H.J.Karwowski,B.Lalremruata,J.Manfredi, L027100100008 J.M.Mueller,P.U.Sauer,R.Skibinski,A.P.Smith,M.B.Tsang, L027100100009 H.R.Weller,H.Witala,Y.K.Wu,Z.W.Zhao) L027100100010 INSTITUTE (1USATNL,1USADKE,3CPRTSI,1USANCC,1USAWMC,2PRTLIS, L027100100011 3POLUJK,1USANCA,1USAMSU,2GERUH) L027100100012 (3INDIND) Mizoram University, Aizawl L027100100013 REFERENCE (J,PR/C,103,034311,2021) L027100100014 FACILITY (ESTRG,1USATNL) Experiment performed at HIgS facility L027100100015 at TUNL, Durham L027100100016 SAMPLE Cylindrical target chamber made of Sol-Gel coated L027100100017 Pyrex glass 39.6 cm long and 2.9 cm in diameter was L027100100018 connected to spherical pumping chamber 8.1 cm. The L027100100019 spin-exchange optical pumping technique was used to L027100100020 polarize 3He target. A small quantity of Rb and K was L027100100021 placed in the pumping chamber, heated to 196 deg C. A L027100100022 circularly polarized 794.8 nm laser light incident on L027100100023 the pumping chamber polarized Rb atoms which in turn L027100100024 transferred their polarization to 3He. The target was L027100100025 filled with (6.5+-0.1) amg of 3He. L027100100026 (1 amg = 44.615 mol/m3) L027100100027 Polarization of the target was 33% for the initial run L027100100028 period and 22% for the final run period. L027100100029 DETECTOR (SIBAR) Protons from the 3He photodisintegrations L027100100030 were detected by 72 fully depleted silicon surface L027100100031 barrier detectors. The detectors were placed at the L027100100032 proton angles of 45, 70, 95, and 120 deg (18 L027100100033 detectors at each angle) along the target at a L027100100034 distance of 10 cm from target axis. L027100100035 (SCIN) Two BC-501A liquid scintillator detectors were L027100100036 used to detect neutrons from the deuteron L027100100037 photodisintegration process to monitor photon flux. L027100100038 MONITOR (1-H-2(G,N)1-H-1,,SIG) L027100100039 A 10.56 cm long C6D6 cell was used as active L027100100040 monitor target L027100100041 MONIT-REF (M0463001,D.M.Skopik+,J,PR/C,9,531,1974) L027100100042 (M0405001,R.Bernabei+,J,PRL,57,1542,1986) L027100100043 (M0949001,A.De Graeve+,J,PR/C,45,860,1992) L027100100044 INC-SOURCE (LCS) Quasi-monochromatic linearly polarized gamma-ray L027100100045 beams were produced from laser Compton backscattering L027100100046 of free-electron laser photons off relativistic L027100100047 electrons. The resulting gamma-ray beam is nearly L027100100048 mono-energetic and almost 100% circularly polarized. L027100100049 The beam intensity on the target was up to 3E+7 phot/s L027100100050 ERR-ANALYS (ERR-SYS) Systematic uncertainty in overall L027100100051 target and beam polarization L027100100052 HISTORY (20210329C) Compiled by S.H. L027100100053 ENDBIB 51 0 L027100100054 COMMON 6 3 L027100100055 EN EN-RSL POL-BM POL-TR POL-TR ERR-SYS L027100100056 MEV PER-CENT NO-DIM NO-DIM NO-DIM PER-CENT L027100100057 29. 5.0 1.00 0.22 0.33 4.3 L027100100058 ENDCOMMON 3 0 L027100100059 ENDSUBENT 58 0 L027100199999 SUBENT L0271002 20210329 L047L027100200001 BIB 3 5 L027100200002 REACTION (2-HE-3(G,P)1-H-2,,POL/DA,,ASY) L027100200003 ERR-ANALYS (DATA-ERR) Given uncertainty include statistical and L027100200004 systematic uncertainties L027100200005 STATUS (CURVE) Data taken from fig. 3 of the reference L027100200006 waiting for data from author L027100200007 ENDBIB 5 0 L027100200008 NOCOMMON 0 0 L027100200009 DATA 3 4 L027100200010 ANG DATA ERR-T L027100200011 ADEG NO-DIM NO-DIM L027100200012 45. -0.047 0.039 L027100200013 70. 0.002 0.026 L027100200014 95. -0.028 0.032 L027100200015 120. 0.093 0.066 L027100200016 ENDDATA 6 0 L027100200017 ENDSUBENT 16 0 L027100299999 SUBENT L0271003 20210329 L047L027100300001 BIB 4 14 L027100300002 REACTION 1(2-HE-3(G,P)1-H-2,LON,SIG,,DSP) L027100300003 2(2-HE-3(G,P)1-H-2,TRS,SIG,,DSP) L027100300004 ANALYSIS Spin dependent cross sections were obtained from known L027100300005 total cross section, angular distribution of the L027100300006 unpolarized differential cross sections and measured L027100300007 spin dependent asymmetry L027100300008 ERR-ANALYS (ERR-T) Uncertainties include L027100300009 - statistical uncertainty L027100300010 - systematic uncertainty L027100300011 - uncertainty associated with known angular L027100300012 distribution L027100300013 - uncertainty in known total cross section L027100300014 STATUS (TABLE) Data taken from tab. 1 of the reference L027100300015 (DEP,L0271002) L027100300016 ENDBIB 14 0 L027100300017 NOCOMMON 0 0 L027100300018 DATA 4 1 L027100300019 DATA 1ERR-T 1DATA 2ERR-T 2 L027100300020 MICRO-B MICRO-B MICRO-B MICRO-B L027100300021 277. 32. 276. 30. L027100300022 ENDDATA 3 0 L027100300023 ENDSUBENT 22 0 L027100399999 ENDENTRY 3 0 L027199999999