Directory: levels/ File: levels-param.readme (August, 2015) Updated on October 2016 to correct an error in N0 discovered by O. Litaize (CEA) ******************************************************************************** levels-param.dat Constant temperature fit of nuclear level schemes based on ENSDF source files (April 2014) ************************************************* Content ------- Results of the constant temperature (CT) fit of nuclear level schemes. The main purpose of the file is to provide cut-off energies defining completeness of level schemes (Umax) and completeness of spin assignment (Uc) for a given isotope. Included are the parameters that can be used in level density calculations with constant temperature formula. Other parameters define quality of the decay scheme and of the constant temperature fit. Details of the fitting procedure can be found in the report INDC(NDS)-416, in the RIPL-2 TECDOC, and in the RIPL paper (Nuclear Data Sheets 2009) Format: * NOTE on the August 2015 version * the Nox, Xm, Ex field are now obsolete. In this RIPL-Discrete Levels release the "+X" energies were removed. These fields are still present in levels-param.dat, with default values, to provide backward-compatibility. ------ Each record of the file contains: Z : charge number A : mass number El : elemental symbol T : temperature T in the CT model dT : uncertainty of T U0 : back-shift in CT model dU0 : uncertainty of U0 Nlev : number of levels in the ENSDF data set Nmax : maximum level number up to which the level scheme is complete N0 : minimum level number from which the fit is considered Nc : number of level at which unique spin sequence ends Umax : energy corresponds to Nmax Uc : energy corresponds to Nc Chi : measure of the quality of fit (blank if there was no fit) Fit : =* if the record comes from the fit of pre-selected nuclei, which provided the T(A) function = blank if there was no fit Flag : ='F' if Chi>0.05 (bad fit) = blank otherwise NoX : number of levels with +X, +Y, +Z ... notation (X,Y,Z... are unknown energy values) Xm : level number where the first +X, +Y, +Z ... notation appears Ex : level energy where the first +X, +Y, +Z ... notation appears sigma: spin cut-off values extracted from the discrete level library The corresponding FORTRAN format is (2i4,1x,a2,4(1x,f9.5),4i4,1x,f8.5,1x,f8.5,(1x,e10.3),1x,A1,1x,A1,2i4,f7.4,1x,f6.3) level-param.dat can be read with the following FORTRAN code character el*2,char*1,flag integer z,a,nlev,nmin,nc,NoX,Xm real tfitted,td,u0,du0,umax0,uc,chi,EX,sigma open(1,file='level-param.dat',status='old') read(1,*) read(1,*) read(1,*) read(1,*) do while(.not.eof(1)) read(1,100) z,a,el,tfitted,td,u0,du0,nlev,nmax,nmin,nc,umax0,uc,chi,char,flag,NoX,Xm,EX,sigma write(*,100) z,a,el,tfitted,td,u0,du0,nlev,nmax,nmin,nc,umax0,uc,chi,char,flag,NoX,Xm,EX,sigma enddo 100 format(2i4,1x,a2,4(1x,f9.5),4i4,1x,f8.5,1x,f8.5,(1x,e10.3),1x,A1,2i4,f7.4,1x,f6.3) END