ENTRY J1609 20070514 J006J160900000001 SUBENT J1609001 20070514 J006J160900100001 BIB 12 44 J160900100002 TITLE Two-nucleon pion absorption in 4He at 1 GeV/c J160900100003 AUTHOR (T.Nagae, T.Fukuda, M.Sekimoto, T.Miyachi, P.Kitching, J160900100004 I.Nomura, I.Arai, K.Tomizawa, H.Kitayama, Y.Nagasaka, J160900100005 S.Ueno, K.Waki, K.Maeda, T.Suda, H.Matsuyama, J160900100006 T.Kobayashi, D.Rowntree, M.A.Prohvatilov, V.I.Rasin) J160900100007 INSTITUTE (2JPNTOK) Institute for Nuclear Study J160900100008 (2JPNIPC) J160900100009 (2JPNTSU) Institute of Physics J160900100010 (2JPNTOH) College of General Education J160900100011 (2JPNTOH) Laboratory of Nuclear Science J160900100012 (2JPNLEP) J160900100013 (1USAMIT) J160900100014 (4RUSJIA) J160900100015 REFERENCE (J,PL/B,335,(3-4),330,199409) J160900100016 REL-REF (D,E1838001,M.Akemoto+,J,PL/B,149,321,1984) J160900100017 d(pi+,pp) data shown in this reference are compared J160900100018 with present results. 4He(pi+,pn) is much more forward J160900100019 peaked. J160900100020 INC-SOURCE Beam intensity: 10**5 particles/spill J160900100021 (SPALL) J160900100022 SAMPLE - Chemical-form of target is element. J160900100023 - Physical-form of target is liquid. J160900100024 - Target-thickness is 2800 mg/cm**2. J160900100025 - Backing: cylindrical container made of stainless J160900100026 steel J160900100027 - Backing-thickness: a window thickness of 0.5 mm J160900100028 METHOD (TOF) J160900100029 FACILITY (SYNCH,2JPNLEP) KEK 12GeV proton synchrotron J160900100030 DETECTOR (MAGSP) Dipole magnet to analyze the momentum of the J160900100031 forward-scattered charged particles. J160900100032 Efficiency of the spectrometer was estimated J160900100033 to be 59+-3 % for high-momentum protons. J160900100034 (SCIN) Nine plastic scintillators to identify J160900100035 forward-scattered charged particles (ToF wall). J160900100036 (SCIN) Two ToF walls (NHA and HNB) to detect protons J160900100037 and neutrons. Detection efficiencies for J160900100038 neutron is 11+-1 % for 400 MeV/c to 950 MeV/c J160900100039 neutron, while 10+-1 % for neutrons with same J160900100040 momentum range. J160900100041 ERR-ANALYS (DATA-ERR) The error includes statistical one and J160900100042 systematic ones due to background J160900100043 subtraction. J160900100044 HISTORY (20031002T) Nk + Am + On. Converted from NRDF D1609 J160900100045 (20051103T) On. Converted from EXFOR E1609 J160900100046 ENDBIB 44 0 J160900100047 COMMON 2 3 J160900100048 MOM MOM-RSL J160900100049 GEV/C PER-CENT J160900100050 1. 1.5 J160900100051 ENDCOMMON 3 0 J160900100052 ENDSUBENT 51 0 J160900199999 SUBENT J1609002 20070514 J006J160900200001 BIB 6 8 J160900200002 REACTION (2-HE-4(PIP,P+X)1-H-1,,DA) J160900200003 PART-DET (P) J160900200004 EN-SEC ANG is polar angle between beam and proton in J160900200005 laboratory system J160900200006 METHOD (COINC) Detect proton and proton in coincidence. J160900200007 STATUS (CURVE) Data scanned from Fig.3 solid circles, p333 in J160900200008 reference J160900200009 HISTORY (20061219A) At. Re-digitized J160900200010 ENDBIB 8 0 J160900200011 NOCOMMON 0 0 J160900200012 DATA 3 11 J160900200013 ANG DATA DATA-ERR J160900200014 ADEG MU-B/SR MU-B/SR J160900200015 4.555E+00 5.512E+02 J160900200016 7.531E+00 4.756E+02 J160900200017 1.052E+01 1.936E+02 J160900200018 1.350E+01 1.740E+02 J160900200019 1.653E+01 1.894E+02 3.069E+01 J160900200020 1.951E+01 1.368E+02 J160900200021 2.249E+01 9.108E+01 J160900200022 2.547E+01 6.856E+01 1.115E+01 J160900200023 2.856E+01 8.671E+01 J160900200024 3.153E+01 9.831E+01 J160900200025 3.451E+01 6.817E+01 J160900200026 ENDDATA 13 0 J160900200027 ENDSUBENT 26 0 J160900299999 SUBENT J1609003 20070514 J006J160900300001 BIB 6 8 J160900300002 REACTION (2-HE-4(PIP,N+X)1-H-1,,DA,P) J160900300003 PART-DET (P,N) J160900300004 EN-SEC ANG is polar angle between beam and proton in J160900300005 laboratory system J160900300006 METHOD (COINC) Detect proton and neutron in coincidence. J160900300007 STATUS (CURVE) Data scanned from Fig.3 solid squares, p333 in J160900300008 reference J160900300009 HISTORY (20061219A) At. Re-digitized J160900300010 ENDBIB 8 0 J160900300011 NOCOMMON 0 0 J160900300012 DATA 3 11 J160900300013 ANG DATA DATA-ERR J160900300014 ADEG MU-B/SR MU-B/SR J160900300015 4.498E+00 4.615E+02 1.335E+02 J160900300016 7.541E+00 2.644E+02 6.010E+01 J160900300017 1.054E+01 7.145E+01 1.991E+01 J160900300018 1.351E+01 6.783E+01 1.550E+01 J160900300019 1.650E+01 3.679E+01 1.064E+01 J160900300020 1.954E+01 2.449E+01 2.051E+01 J160900300021 2.251E+01 2.056E+01 9.738E+00 J160900300022 2.550E+01 9.336E+00 8.047E+00 J160900300023 2.854E+01 5.133E+00 9.964E+00 J160900300024 3.151E+01 6.317E+00 9.889E+00 J160900300025 3.450E+01 2.948E+00 1.066E+01 J160900300026 ENDDATA 13 0 J160900300027 ENDSUBENT 26 0 J160900399999 ENDENTRY 3 0 J160999999999