/*===================================================================*/ /* NRDF D2004 Data No.4 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,4; D#=D2004; TITLE=/ Astrophysical reaction rate for alpha (alpha n, gamma)9Be by photodisintegration /; ATH=(K.SUMIYOSHI'1', H.UTSUNOMIYA'2', S.GOKO'2', T.KAJINO'3'); INST-ATH=(2JPNJPN'1', 2JPNKON'2', 2JPNJPN'3'); /* '1' Numazu College of Technology, Numazu */ /* '2' Department of Physics */ /* '3' National Astronomical Observatory, Mitaka */ REF=NP/A; VLP=709(2002)467; /* Secondary reference - Utsunomiya, Private communication(2007) RCTS=(9BE(GAMMA,N)8BE, 9BE(GAMMA,), 9BE(GAMMA,GAMMA)9BE, 9BE(GAMMA,N)); PHQS=(XSECTN, RESN-WDTH); /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,4; /* 2007-01-09 : Recieved, On. Received by e-mail from A.Makinaga /* 2007-01-12 : Compiled, On */ /* Related references - Proofread by Hiroaki Utsunomiya (2007.01.13), k2003003, J(Phys)63. /* Additional results shown but not compiled - Reaction rate (Thermal reaction rate for alpha+alpha+n -> gamma + 9Be) CHM=ELM; PHYS-FORM=SLD; THK-TGT=XMG/CM**2'4'; /* '4' 4 cm thick */ POL-TGT=0%; ALGN-TGT=0%; ACC=X'5'; /* '5' Electron storage ring, To store electron beam at 308 to 587 MeV */ INST-ACC=2JPNAIS'6'; /* '6' Electron storage ring TERAS */ POL-PRJ=0%; ION-SOURCE=/ Laser compton scattering photons (lambda=1053 nm (1.2 eV) laser photons used) /; DET-PARTCL=N; COINC=NO; ANT-COINC=NO; DET-SYS=(BF3'7',BGO'8'); /* '7' To detect neutrons */ /* '8' To monitor flux of photon beam */ /* n+8Be and 5He+ alpha channel cannot be distinguished experimentally. Cross sections presented in the reference are based on the detection efficiency for the n+8Be channel. (Authors confirmed that the difference in detection efficiency between the two channels is negligible.) */ RCT=(9BE(GAMMA,), 9BE(GAMMA,GAMMA)9BE, 9BE(GAMMA,N)); RTY=ELA-SCATT; PHQ=RESN-WDTH; /* Additional results shown but not compiled - B(E1)= 0.104+-0.002 (e**2 fm**2) for 1/2+ state and 0.0406+-0.0007 (e**2 fm**2) for 5/2+ state, B(M1)= 0.295+-0.072 (e hbar/2Mc)**2 for 5/2- state /* Analysis: - Er and Gamma(n) were deduced from least squares fit, while Gamma(gamma) was deduced from energy-integrated cross section. /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,4; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; SPIN PTY RESN-ENGY DELTA-RESN-ENGY'15' RESN-ENGY'16' DELTA-RESN-ENGY'16,17' RESN-ENGY'18' DELTA-RESN-ENGY'18,19' (NODIM) (NODIM) (MEV) (MEV) (MEV) (MEV) (MEV) (MEV) 0.5 1 1.735 +-0.003 0.568 +-0.011 225 +-12 2.5 -1 2.43 +-X 0.049 +-0.012 X +-X 2.5 1 3.077 +-0.009 1.24 +-0.02 549 +-12 \END; /*===================================================================*/ |