ENTRY O0798 20190419 O068O079800000001 SUBENT O0798001 20190419 O068O079800100001 BIB 14 52 O079800100002 TITLE Measurement of the exclusive d(p,e+e-)3-He and O079800100003 d(p,gamma)3-He reactions at 98 and 176 MeV. O079800100004 REFERENCE (J,NP/A,641,389,1998) O079800100005 AUTHOR (R.Johansson, T.B.Bright, G.Faeldt, B.Hoeistad, O079800100006 E.Traneus, J.Bacelar, H.Huisman, O079800100007 N.Kalantar-Nayestanaki, J.G.Messchendorp, M.Seip) O079800100008 INSTITUTE (2SWDUPP) Department of radiation sciences. O079800100009 (2NEDKVI) O079800100010 SAMPLE A 35.0 mg/cm2 CD2 target. Since previous test runs O079800100011 have indicated that deuterium vanishes during O079800100012 measurements, the deuterium content of the CD2 target O079800100013 was continously monitored during the runs by a O079800100014 deuterium monitor. However, the observed deuterium O079800100015 deterioration was small, in fact less than the O079800100016 uncertainty in target thickness. O079800100017 REL-REF (I,,B.Hoeistad+,J,NIM/A,295,172,1990) A comprehensive O079800100018 description of PACMAN spectrometer. O079800100019 FACILITY (ISOCY,2SWDUPP) Gustav Werner cyclotron. O079800100020 METHOD (EXTB) The beam was focused to a 5 mm diam. beam spot. O079800100021 DETECTOR (SPEC) The experimental set-up consists of ihe magneticO079800100022 pair spectrometer PACMAN, a beam monitoring system O079800100023 including two threefold scintillation telescopes aimed O079800100024 at the target and two ion chambers placed in the beam O079800100025 behind the scattering chamber. O079800100026 COMMENT -By authors. The electron-positron pair resulting fromO079800100027 the virtual photon enter the spectrometer directly O079800100028 while the real photons are converted into O079800100029 electron-positron pairs in a 12 X 20.6 cm2 converter O079800100030 foil located in the fringe field, 58.5 cm from the O079800100031 target. The magnetic field bends the electron and O079800100032 positron pair 180 degr., where they reach the O079800100033 detectors that give the event trigger and the track O079800100034 coordinates. The detectors are arranged in two O079800100035 identical groups that are positioned symmetrically O079800100036 above and below the scattering centre. Each detector O079800100037 group consists of three drift chamber packages and O079800100038 three planes of trigger scintillators, where each O079800100039 scintillator plane consists of four separate detectors.O079800100040 An event trigger is generated by a simultaneous signal O079800100041 in all three scintillator planes above and below the O079800100042 scattering centre. The measurement of the (p,e+e-) O079800100043 reaction cross section is made by simply removing the O079800100044 converter at the spectrometer entrance. O079800100045 STATUS (TABLE) Tbl.1 from Nucl.Phys.A641(1998)389 O079800100046 ERR-ANALYS (ERR-S) Statistical error O079800100047 ADD-RES (THEO) Model calculation. O079800100048 HISTORY (20061101C) O079800100049 (20070605A) Data-heading in Subentries 002-003 is O079800100050 corrected according N.Otsuka remarks. O079800100051 (20070605U) Last checking has been done. O079800100052 (20170418A) SD: REACTION code in Subent 003 corrected. O079800100053 (20190419U) SD: Small correction in Subent 002. O079800100054 ENDBIB 52 0 O079800100055 NOCOMMON 0 0 O079800100056 ENDSUBENT 55 0 O079800199999 SUBENT O0798002 20190419 O068O079800200001 BIB 4 6 O079800200002 REACTION (1-H-2(P,G)2-HE-3,,DA) O079800200003 PART-DET (G) O079800200004 REL-REF (A,,M.A.Pickar+,J,PR/C,35,37,1987) Data from the O079800200005 publication were used to compare with the data which O079800200006 are presented in compiled paper. O079800200007 HISTORY (20190419U) SD: Year of ref. in REL-REF corrected. O079800200008 ENDBIB 6 0 O079800200009 NOCOMMON 0 0 O079800200010 DATA 4 4 O079800200011 EN ANG DATA-CM ERR-S O079800200012 MEV ADEG NB/SR NB/SR O079800200013 98. 40. 279. 11. O079800200014 98. 80. 186. 18. O079800200015 176. 40. 130. 8. O079800200016 176. 80. 83. 12. O079800200017 ENDDATA 6 0 O079800200018 ENDSUBENT 17 0 O079800299999 SUBENT O0798003 20190419 O068O079800300001 BIB 4 5 O079800300002 REACTION (1-H-2(P,PAI)2-HE-3,,DA) O079800300003 PART-DET (E) Electron-positron pair O079800300004 MISC-COL (MISC) Production cross section for pair energy <7 MeV.O079800300005 (MISC-ERR) Statistical error in 'MISC' col. O079800300006 HISTORY (20170418A) SD: SF3=X -> PAI. O079800300007 ENDBIB 5 0 O079800300008 NOCOMMON 0 0 O079800300009 DATA 6 4 O079800300010 EN ANG DATA-CM ERR-S MISC MISC-ERR O079800300011 MEV ADEG NB/SR NB/SR NB/SR NB/SR O079800300012 98. 40. 2.59 0.18 1.31 0.09O079800300013 98. 80. 1.92 0.36 0.97 0.18O079800300014 178. 40. 1.18 0.11 0.52 0.05O079800300015 178. 80. 0.52 0.19 0.23 0.08O079800300016 ENDDATA 6 0 O079800300017 ENDSUBENT 16 0 O079800399999 ENDENTRY 3 0 O079899999999