ENTRY M0669 20210620 M113M066900000001 SUBENT M0669001 20210620 M113M066900100001 BIB 12 49 M066900100002 TITLE Near threshold measurement of the 4He(g,n) reaction. M066900100003 AUTHOR (B.Nilsson,J.-O.Adler,B.-E.Andersson,J.R.M.Annand, M066900100004 I.Akkurt,M.J.Boland,G.I.Crawford,K.G.Fissum, K.Hansen, M066900100005 P.D.Harty,D.G.Ireland,L.Isaksson, M.Karlsson,M.Lundin, M066900100006 J.C.Mcgeorge,G.J.Miller, H.Ruijter,A.Sandell, M066900100007 B.Schroder,D.A.Sims,D.Watts) M066900100008 REFERENCE (J,PL/B,626,65,2005) M066900100009 INSTITUTE (2SWDLND,2UK GLS) M066900100010 FACILITY (MICRT,2SWDLND) Race-track microtron tagged-photon M066900100011 facility. M066900100012 SAMPLE A storage-cell cryostat held the liquid 4He at M066900100013 liquid-N2 temperature. M066900100014 INC-SOURCE (QMPH,TAGD) Quasimonoenergetic photons from M066900100015 bremsstrahlung tagging. M066900100016 DETECTOR (SPEC,SCIN) Two large solid-angle spectrometers, each M066900100017 consisting of 9 20 cm x 20 cm deep rectangular cells M066900100018 mounted in 3 x 3 lattice and filled with liquid M066900100019 scintillator NEA2132A. M066900100020 METHOD (TOF) Time-of-flight spectrometer consisted of liquid M066900100021 and plastic scintillators. M066900100022 ERR-ANALYS (ERR-S) Statistical uncertainties. M066900100023 (ERR-1) Uncertainty in neutron-detection efficiency M066900100024 (ERR-2) Uncertainty in neutron inscattering M066900100025 (ERR-3) Uncertainty in neutron-yield attenuation M066900100026 (ERR-4) Uncertainty in tagger focal-plane lifetime M066900100027 (ERR-5) Uncertainty in neutron-detector lifetime M066900100028 (ERR-6) Uncertainty in scale quantity value M066900100029 uncertainty tagging efficiency. M066900100030 (ERR-7) Uncertainty in particle misidentification M066900100031 (ERR-8) Uncertainty in photon-beam attenuation M066900100032 COMMENT A near-threshold 4He(g,n) cross section measurement M066900100033 has been performed at MAX-lab. Tagged photons from M066900100034 23 < Eg < 42 MeV were directed toward a liquid 4He M066900100035 target, and neutrons were detected by time-of-flight M066900100036 in two liquid-scintillator arrays. Seven-point M066900100037 angular distributions were measured for eight photon M066900100038 energies. The results are compared to experimental M066900100039 data measured at comparable energies and M066900100040 Recoil-Corrected Continuum Shell Model, Resonating M066900100041 Group Method, and recent Hyperspherical-Harmonic M066900100042 Expansion calculations. The angle-integrated cross M066900100043 section data are peaked at a photon energy of about M066900100044 28 MeV, in disagreement with value recommended by M066900100045 Calarco, Berman, and Donelly in 1983. M066900100046 HISTORY (20060306C) Data were compiled at the MSU SINP CDFE M066900100047 by V.V.Varlamov. M066900100048 (20210620U) Corrected by SD and VV: Corrections in all M066900100049 SUBENTs, AUTHOR corrected (B.Nilson -> B.Nilsson). M066900100050 ERR-ANALYS. M066900100051 ENDBIB 49 0 M066900100052 COMMON 9 6 M066900100053 EN-RSL ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 M066900100054 ERR-6 ERR-7 ERR-8 M066900100055 MEV PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT M066900100056 PER-CENT PER-CENT PER-CENT M066900100057 0.3 8. 9. 6. 2. 1. M066900100058 3. 1. 1. M066900100059 ENDCOMMON 6 0 M066900100060 ENDSUBENT 59 0 M066900199999 SUBENT M0669002 20210620 M113M066900200001 BIB 4 6 M066900200002 REACTION (2-HE-4(G,N)2-HE-3,,DA) M066900200003 METHOD (PSD) Pulse-shape discrimination was employed to M066900200004 distinguish neutrons from photons. M066900200005 STATUS (CURVE) Data from Fig. 1 of Phys.Let.,B626(2005)65. M066900200006 HISTORY (20210620U) Corrected by SD and VV: ANALYSIS - METHOD, M066900200007 STATUS added. M066900200008 ENDBIB 6 0 M066900200009 COMMON 1 3 M066900200010 EN M066900200011 MEV M066900200012 28.8 M066900200013 ENDCOMMON 3 0 M066900200014 DATA 3 7 M066900200015 ANG-CM DATA-CM ERR-S M066900200016 ADEG MU-B/SR MU-B/SR M066900200017 45. .078 .007 M066900200018 60. .108 .005 M066900200019 75. .146 .005 M066900200020 90. .144 .006 M066900200021 105. .155 .005 M066900200022 120. .145 .006 M066900200023 135. .109 .006 M066900200024 ENDDATA 9 0 M066900200025 ENDSUBENT 24 0 M066900299999 SUBENT M0669003 20210620 M113M066900300001 BIB 4 5 M066900300002 REACTION (2-HE-4(G,N)2-HE-3,,SIG) M066900300003 ANALYSIS (INTAD) M066900300004 STATUS (CURVE) Data from Fig. 3 of Phys.Let.,B626(2005)65. M066900300005 HISTORY (20210620U) Corrected by SD and VV: ANALYSIS, M066900300006 STATUS added. M066900300007 ENDBIB 5 0 M066900300008 NOCOMMON 0 0 M066900300009 DATA 3 8 M066900300010 EN DATA ERR-S M066900300011 MEV MB MB M066900300012 24. 1.315 .132 M066900300013 27. 1.613 .066 M066900300014 29. 1.396 .045 M066900300015 31. 1.076 .036 M066900300016 34. .879 .032 M066900300017 37. .733 .034 M066900300018 39. .633 .032 M066900300019 41. .541 .028 M066900300020 ENDDATA 10 0 M066900300021 ENDSUBENT 20 0 M066900399999 ENDENTRY 3 0 M066999999999