Ground state properties

Chart files for Isotope Explorer

Ground state properties

This is a very preliminary write-up of the GS properties data. The chart option is a marvellous way of spotting errors. I have indicated a few problems (mostly in the data, but possibly some in the program) below in italics.

The chart data file gsprop.dat contains experimentally determined ground state nuclear properties. The data are from the Table of Isotopes except as noted.

Level energy and uncertainty: *** What is the point of this - they are all zero. Do you want to include isomers also in the same chart?
Spin/parity: Ground state spin/parity. *** I doubt that 265Hs has JPI=0+.
Half-life: Ground state half-life in given units.
Half-life in seconds: Ground state half-life in seconds. 128Te: > missing (is this general?)
Magnetic dipole moment: Ground state magnetic moment in nuclear magnetons
Electric quadrupole moment: Ground state electric quadrupole moment in e²b²
Percent abundance: Percent abundance *** where? On earth or in the universe?$$
Percent decay by electron capture/beta+: Ground state decay by electron capture/beta+ in percent. *** Many are = ? There are lots of strange-looking gaps, e.g. 166,169Re
Percent decay by beta-: Ground state decay by beta- in percent ***258Hs in -5!!!!***
Percent decay by alpha emission: Ground state decay by alpha particle emission in percent
Percent decay by isomeric transition and uncertainty: *** By definition zero, so why not skip this? *** There are some very strange values here, there must be a bug***
Percent decay by proton emission: Ground state decay by proton emission in percent
Percent decay by ¹⁴C emission: Ground state decay by ¹⁴C emission in percent
Percent decay by ²⁰Ne emission: Ground state decay by ²⁰Ne emission in percent
Percent double beta minus decay: Ground state decay by double beta minus emission in percent
Percent decay by neutron emission: *** Values=? 234U: value incorrect, it says %Ne= in the file!
Percent decay by two proton emission
Percent decay by two proton, alpha emission: *** No data, skip
Percent decay by two alpha emission and uncertainty
Percent decay by spontaneous fission: *** Values=? No errors
Percent decay by beta minus delayed neutron emission: *** 149Ba + several: ) in value.
Percent decay by beta minus delayed two neutron emission
Percent decay by beta minus delayed three neutron emission: *** No data, skip
Percent decay by beta minus delayed alpha emission: *** Bi: uncertainty missing. Where do these values come from??
Percent decay by beta minus delayed two alpha emission
Percent decay by beta minus delayed three alpha emission
Percent decay by beta minus delayed triton emission and: *** No data, skip
Percent decay by electron capture delayed proton emission: *** Many values=? 149ER: ) in value
Percent decay by electron capture delayed two proton
Percent decay by electron capture delayed three proton
Percent decay by electron capture delayed alpha emission: *** Some values=? ) in values
Percent decay by electron capture delayed two alpha
Percent decay by electron capture delayed three alpha
Percent double electron capture decay: *** No data, skip
Percent decay by electron capture delayed proton two alpha emission: *** Value=?
Mass excess: Mass excess M-A in keV *** Wapstra's masses?
Binding energy: Binding energy in keV
Binding energy per nucleon: Binding energy per nucleon in keV
Q(beta-): Q-value for beta- decay in keV
Q(EC): Q-value for electron capture in keV
Q(alpha): Q(alpha) in keV
S_n: Neutron separation energy in keV
S_p: Proton separation energy in keV
Sigma(n,g) Maxw.: (n,gamma) cross section in barns for T=300^o maxwellian neutrons *** ALL SIGMA'S MISSING!
*** Are all these really interesting? Where do they come from? sig0=Sigma-2200m/sec sigs=Sigma-free sigr=Sigma-reactor siga=Sigma(n,a) sigp=Sigma(n,p) sigF=Sigma(n,f) sigA=Sigma(abs) sigT=Sigma(tot) sigf=Sigma(n,f)-r sigR=Sigma(n,a)-r sigg=Sigma(n,f)-2200 sigS=Sigma(abs)-r sigP=Sigma(n,p)-2200 sig@=Sigma(n,a)-2200